Use of yttrium, zirconium, lanthanum, cerium, praseodymium and/or neodymium as reinforcing agent for an anticorrosion coating composition
Abstract
The subject of the present invention is the use of at least one element chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides or salts, as reinforcing agent for the anticorrosion properties of an anticorrosion coating composition containing a particulate metal, in aqueous or organic phase, for metal parts.
Term
Term ended
Expired 13 July 2024, 2.2 years ago.
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38 claims: 38 independent, 0 dependent
- 1Use of at least one element chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium in the form of oxides as reinforcing agent for anticorrosion of a coating composition containing a particulate metal in aqueous phase, for metal parts. Utilisation d'au moins un élément choisi parmi l'yttrium, le zirconium, le lanthane, le cérium, le praséodyme et le néodyme, sous la forme d'oxydes, en tant qu'agent de renforcement pour l'anticorrosion d'une composition de revêtement contenant un métal particulaire en phase aqueuse, pour des parties métalliques. Verwendung mindestens eines Elements, das aus Yttrium, Zirconium, Lanthan, Cer, Praseodym und Neodym ausgewählt ist, in Form von Oxiden als Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung, die in wässriger Phase ein teilchenförmiges Metall enthält, für Metallteile.
- 2Use according to claim 1, characterized in that one of the above-cited elements as anticorrosion property reinforcing agent is associated with molybdenum oxide MoO3. Utilisation selon la revendication 1, caractérisée en ce que les éléments cités ci-dessus en tant qu'agent de renforcement ayant des propriétés anticorrosives est associé à l'oxyde de molybdène MoO3. Verwendung nach Anspruch 1, dadurch gekennzeichnet, dass eines der vorstehend angeführten Elemente als ein die Antikorrosionseigenschaft verstärkendes Mittel mit Molybdänoxid MoO3 assoziiert ist.
- 3Use according to any of claims 1 or 2 characterized in that the element used is yttrium in the oxide form Y2O3. Utilisation selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que l'élément utilisé est l'yttrium sous la forme d'oxyde Y2O3. Verwendung nach irgendeinem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das verwendete Element Yttrium in der Oxidform Y2O3 ist.
- 4Use according to claim 3, characterized in that yttrium oxide Y2O3 is used in the form of particles having a size between 1 µm and 40 µm with a D50 of less than 3 µm. Utilisation selon la revendication 3, caractérisée en ce que l'oxyde d'yttrium Y2O3 est utilisé sous la forme de particules ayant une taille comprise entre 1 µm et 40 µm avec un D50 de moins de 3 µm. Verwendung nach Anspruch 3, dadurch gekennzeichnet, dass Yttriumoxid Y2O3 in Form von Teilchen mit einer Größe zwischen 1 µm und 40 µm mit einem D50 von weniger als 3 µm verwendet wird.
- 5Use according to any of claims 1 or 2 characterized in that the element used is cerium in the oxide form CeO2. Utilisation selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que l'élément utilisé est le cérium sous la forme d'oxyde CeO2. Verwendung nach irgendeinem der Ansprüche 1oder 2, dadurch gekennzeichnet, dass das verwendete Element Cerin der Oxidform CeO2, ist.
- 6Use according to any of claims 1 or 2 characterized in that the element used is La2O3, Pr6O11, Nd2O3 or ZrO2. Utilisation selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que l'élément utilisé est La2O3, Pr6O11, Nd2O3 ou ZrO2. Verwendung nach irgendeinem der Ansprüche 1oder 2, dadurch gekennzeichnet, dass das verwendete Element La2O3, Pr6O11, Nd2O3 oder ZrO2 ist.
- 7Use according to any of claims 1 to 6, to reinforce the efficacy of the anticorrosion protection imparted by the particulate metal, the latter preferably being added to the composition in powder form of varying geometric structure, homogenous or heterogeneous, in particular of spherical, lamellar or lenticular structure. Utilisation selon l'une quelconque des revendications 1 à 6, pour renforcer l'efficacité de la protection anticorrosive apportée par le métal particulaire, ce dernier étant de préférence ajouté à la composition sous la forme de poudre de diverses structures géométriques, homogènes ou hétérogènes, en particulier une structure sphérique, lamellaire ou lenticulaire. Verwendung nach irgendeinem der Ansprüche 1 bis 6, um die Wirksamkeit des Antikorrosionsschutzes zu verstärken, welcher durch das teilchenförmige Metall verliehen ist, wobei das Letztgenannte der Zusammensetzung vorzugsweise in Pulverform mit variierender geometrischer Struktur, homogen oder heterogen, insbesondere mit kugelförmiger, lamellarer oder linsenförmiger Struktur, zugesetzt wird.
- 8Use according to any of claims 2 to 7, characterized in that molybdenum oxide MoO3 is used in an essentially pure orthorhombic crystalline form having a molybdenum content greater than 60 % by weight. Utilisation selon l'une quelconque des revendications 2 à 7, caractérisée en ce que l'oxyde de molybdène MoO3 est utilisé sous une forme cristalline orthorhombique essentiellement pure ayant une teneur en molybdène supérieure à 60 % en poids. Verwendung nach irgendeinem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass Molybdänoxid MoO3 in im Wesentlichen reiner orthorhombischer kristalliner Form mit einem Molybdän-Gehalt von mehr als 60 Gew.-% verwendet wird.
- 9Use according to any of claims 2 to 8, characterized in that the molybdenum oxide MoO3 is in the form of particles having a size of between 1 µm and 200 µm. Utilisation selon l'une quelconque des revendications 2 à 8, caractérisée en ce que l'oxyde de molybdène MoO3 est sous la forme de particules ayant une taille comprise entre 1 µm et 200 µm. Verwendung nach irgendeinem der Ansprüche 2 bis 8, dadurch gekennzeichnet, dass das Molybdänoxid MoO3 in Form von Teilchen mit einer Größe zwischen 1 µm und 200 µm vorliegt.
- 10Use according to any of claims 2 to 9, characterized in that said reinforcing agent for anticorrosion is associated with molybdenum oxide MoO3 in a weight proportion of 0.25 < reinforcing agent for anticorrosion :MoO3 < 20, preferably 0.5 < reinforcing agent for anticorrosion : MoO3 < 16, further preferably 0.5 < reinforcing agent for anticorrosion MoO3 < 14. Utilisation selon l'une quelconque des revendications 2 à 9, caractérisée en ce que ledit agent de renforcement pour l'anticorrosion est associé à l'oxyde de molybdène MoO3 en une proportion en poids de 0,25 < agent de renforcement pour l'anticorrosion : MoO3 < 20, de préférence 0,5 < agent de renforcement pour l'anticorrosion : MoO3 < 16, plus préférablement 0,5 < agent de renforcement pour l'anticorrosion : MoO3 < 14. Verwendung nach irgendeinem der Ansprüche 2 bis 9, dadurch gekennzeichnet, dass das Verstärkungsmittel für einen Korrosionsschutz mit Molybdänoxid MoO3 in einem Gewichtsverhältnis von 0,25 < Verstärkungsmittel für Korrosionsschutz: MoO3 < 20, bevorzugt 0,5 < Verstärkungsmittel für Korrosionsschutz: MoO3 < 16, weiter bevorzugt 0,5 < Verstärkungsmittel für Korrosionsschutz: MoO3 <14, assoziiert ist.
- 11Anticorrosion coating composition for metal parts, characterized in that it contains:- at least one particulate metal;- a reinforcing agent for anticorrosion of the composition chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides;- a binder;and- water optionally associated with one or more organic solvents. Antikorrosionsbeschichtungszusammensetzung für Metallteile, dadurch gekennzeichnet, dass sie enthält: - mindestens ein teilchenförmiges Metall;- ein Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung, das aus Yttrium, Zirconium, Lanthan, Cer, Praseodym und Neodym in Form von Oxiden ausgewählt ist;- ein Bindemittel;und- Wasser, das gegebenenfalls mit einem oder mehreren organischen Lösungsmitteln assoziiert ist. Composition de revêtement anticorrosive pour des parties métalliques, caractérisée en ce qu'elle contient : - au moins un métal particulaire ;- un agent de renforcement pour l'anticorrosion de la composition choisi parmi l'yttrium, le zirconium, le lanthane, le cérium, le praséodyme et le néodyme, sous la forme d'oxydes ou de sels ;- un liant ;et- de l'eau optionnellement associée avec un ou plusieurs solvants organiques.
- 12Composition according to claim 11, characterized in that the reinforcing agent for anticorrosion of the composition is associated with molybdenum oxide MoO3. Composition selon la revendication 11, caractérisée en ce que l'agent de renforcement pour l'anticorrosion de la composition est associé à l'oxyde de molybdène MoO3. Zusammensetzung nach Anspruch 11, dadurch gekennzeichnet, dass das Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung mit Molybdänoxid MoO3 assoziiert ist.
- 13Composition according to claim 12, characterized in that it contains 0.5 % to 2 % by weight molybdenum oxide MoO3. Composition selon la revendication 12, caractérisée en ce qu'elle contient de 0,5 à 2 % en poids d'oxyde de molybdène MoO3. Zusammensetzung nach Anspruch 12, dadurch gekennzeichnet, dass sie 0,5 bis 2 Gew.-% Molybdänoxid MoO3 enthält.
- 14Composition according to any of claims 11 to 13, characterized in that the reinforcing agent for anticorrosion of the composition is yttrium in the oxide form Y2O3. Composition selon l'une quelconque des revendications 11 à 16, caractérisée en ce que l'agent de renforcement pour l'anticorrosion de la composition est l'yttrium sous la forme d'oxyde Y2O3. Zusammensetzung nach irgendeinem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass das Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung Yttrium istin der Oxidform Y2O3.
- 15Composition according to any of claims 11 to 13, characterized in that the reinforcing agent for anticorrosion of the composition is cerium in the oxide form CeO2. Composition selon l'une quelconque des revendications 11 à 16, caractérisée en ce que l'agent de renforcement pour l'anticorrosion de la composition est le cérium sous la forme d'oxyde CeO2. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass das Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung Cer ist in der Oxidform CeO2.
- 16Composition according to any of claims 11 to 13, characterized in that the element used is La2O3, Pr6O11, Nd2O3 and ZrO2. Composition selon l'une quelconque des revendications 11 à 16, caractérisée en ce que l'élément utilisé est du La2O3, Pr6O11, Nd2O3 ou ZrO2. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass das verwendete Element aus La2O3, Pr6O11, Nd2O3 und ZrO2 ausgewählt ist.
- 17Composition according to any of claims 11 to 16, characterized in that it contains 10 % to 40 % by weight of at least one particulate metal. Composition selon l'une quelconque des revendications 11 à 16, caractérisée en ce qu'elle contient de 10 à 40 % en poids d'au moins un métal particulaire. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass sie 10 bis 40 Gew.-% mindestens eines teilchenförmigen Metalls enthält.
- 18Composition according to any of claims 11 to 17, characterized in that the particulate metal is chosen from among zinc, aluminium, tin, manganese, nickel, their alloys, and their mixtures. Composition selon l'une quelconque des revendications 11 à 17, caractérisée en ce que le métal particulaire est choisi parmi le zinc, l'aluminium, l'étain, le manganèse, le nickel, leurs alliages, et leurs mélanges. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 17, dadurch gekennzeichnet, dass das teilchenförmige Metall aus Zink, Aluminium, Zinn, Mangan, Nickel, deren Legierungen und deren Mischungen ausgewählt ist.
- 19Composition according to any of claims 11 to 18, characterized in that the particulate metal is chosen from among zinc, aluminium, their alloys and their mixtures. Composition selon l'une quelconque des revendications 11 à 18, caractérisée en ce que le métal particulaire est choisi parmi le zinc, l'aluminium, leurs alliages, et leurs mélanges. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 18, dadurch gekennzeichnet, dass das teilchenförmige Metall aus Zink, Aluminium, deren Legierungen und deren Mischungen ausgewählt ist.
- 20Composition according to any of claims 11 to 19, characterized in that it contains 0.5 % to 10 % weight of said reinforcing agent for anticorrosion of the composition, preferably from 1 % to 8 % by weight, further preferably from 1 to 7 % by weight, relative to the weight of the composition. Composition selon l'une quelconque des revendications 11 à 19, caractérisée en ce qu'elle contient de 0,5 % à 10 % en poids dudit agent de renforcement pour l'anticorrosion de la composition, de préférence de 1 % à 8 % en poids, plus préférablement de 1 à 7 % en poids, par rapport au poids de la composition. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 19, dadurch gekennzeichnet, dass sie 0,5 bis 10 Gew.-% des Verstärkungsmitteis für die Antikorrosion einer Beschichtungszusammensetzung, vorzugsweise 1 bis 8 Gew.-%, weiter bevorzugt 1 bis 7 Gew.-%, bezogen auf das Gewicht der Zusammensetzung, enthält.
- 21Composition according to any of claims 12 to 20, characterized in that said reinforcing agent for anticorrosion of the composition is associated with molybdenum oxide MoO3 in a weight ratio 0.25 < reinforcing agent for anticorrosion :MoO3 <20, preferably 0.5 < reinforcing agent for anticorrosion: MoO3 < 16, further preferably 0.5 < reinforcing agent for anticorrosion: MoO3 < 14. Composition selon l'une quelconque des revendications 12 à 20, caractérisée en ce que ledit agent de renforcement pour l'anticorrosion de la composition est associé à l'oxyde de molybdène MoO3 en un rapport en poids de 0,25 < agent de renforcement pour l'anticorrosion : MoO3 <20, de préférence 0,5 < agent de renforcement pour l'anticorrosion : MoO3 < 16, plus préférablement 0,5 < agent de renforcement pour l'anticorrosion : MoO3 < 14. Zusammensetzung nach irgendeinem der Ansprüche 12 bis 20, dadurch gekennzeichnet, dass das Verstärkungsmittel für die Antikorrosion einer Beschichtungszusammensetzung mit Molybdänoxid MoO3 in einem Gewichtsverhältnis 0,25 < Verstärkungsmittel für Korrosionsschutz: MoO3 < 20, bevorzugt 0,5 < Verstärkungsmittel für Korrosionsschutz: MoO3 < 16, weiter bevorzugt 0,5 < Verstärkungsmittel für Korrosionsschutz: MoO3 <14 assoziiert ist.
- 22Composition according to any of claims 11 to 21, characterized in that it contains 3 % to 20 % by weight of an organic binder and/or mineral binder, in aqueous phase. Composition selon l'une quelconque des revendications 11 à 21, caractérisée en ce qu'elle contient de 3 % à 20 % en poids d'un liant organique et/ou d'un liant minéral, en phase aqueuse. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 21, dadurch gekennzeichnet, dass sie 3 bis 20 Gew.-% eines organischen Bindemittels und/oder mineralischen Bindemittels in wässriger Phase enthält.
- 23Composition according to any of claims 11 to 22, characterized in that the binder is chosen from among an alkoxylated silane, optionally organofunctionalised, a silicone resin, a colloidal silica, a silicate of sodium and/or potassium and/or lithium, a zirconate, a titanate, an epoxy resin, a phenoxy resin, an acrylic and their mixtures, optionally associated with a crosslinking agent of phenolic type, aminoplast type, or dicyandiamide type, or with an acid catalyst. Composition selon l'une quelconque des revendications 11 à 22, caractérisée en ce que le liant est choisi parmi un silane alcoxylé, éventuellement organofonctionnalisé, une résine silicone, une silice colloïdale, un silicate de sodium et/ou de potassium et/ou de lithium, un zirconate, un titanate, une résine époxy, une résine phénoxy, un acrylique et leurs mélanges, éventuellement associé à un agent de 15 réticulation de type phénolique, de type aminoplaste, ou de type dicyandiamide, ou avec un catalyseur acide. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 22, dadurch gekennzeichnet, dass das Bindemittel aus einem alkoxylierten Silan, das gegebenenfalls organofunktionalisiert ist, einem Siliconharz, einem kolloidalen Siliciumdioxid, einem Silicat von Natrium und/oder Kalium und/oder Lithium, einem Zirconat, einem Titanat, einem Epoxyharz, einem Phenoxyharz, einem Acrylharz und deren Mischungen, gegebenenfalls mit einem Vernetzungsmittel vom phenolischen Typ, Aminoplast-Typ oder Dicyandiamid-Typ oder mit einem Säurekatalysator assoziiert, ausgewählt ist.
- 24Composition according to claim 23, characterized in that the binder is an organo-functionalised silane such as γ-glycidoxypropyl-trimetboxysilane and γ-glycidoxypropyltriethoxysilane. Composition selon la revendication 23, caractérisée en ce que le liant est un silane organofonctionnalisé tel que le γ-glycidoxypropyl-triméthoxysilane et le γ-glycidoxypropyltriéthoxy-silane. Zusammensetzung nach Anspruch 23, dadurch gekennzeichnet, dass das Bindemittel ein organofunktionalisiertes Silan, wie γ-Glycidoxypropyltrimethoxysilan und γ-Glycidoxypropyltriethoxysilan, ist.
- 25Composition according to any of claims 11 to 24, characterized in that it contains an organic solvent chosen from among white spirit, alcohols, ketones, aromatic solvents and glycol solvents such as glycol ethers, in particular diethyleneglycol, triethyleneglycol and dipropyleneglycol, acetates, polyethyleneglycol and nitropropane, and their mixtures. Composition selon l'une quelconque des 25 revendications 11 à 24, caractérisée en ce qu'elle contient un solvant organique choisi parmi le white spirit, les alcools, les cétones, les solvants aromatiques et les solvants glycoliques tels que les éthers de glycol, en particulier le diéthylène glycol, le triéthylène glycol et le dipropylène glycol, les acétates, le polyéthylène glycol et le nitropropane, et leurs mélanges. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 24, dadurch gekennzeichnet, dass sie ein organisches Lösungsmittel enthält, das aus Lackbenzin, Alkoholen, Ketonen, aromatischen Lösungsmitteln und Glycol- Lösungsmitteln, wie Glycolethern, insbesondere Diethylenglycol, Triethylenglycol und Dipropylenglycol, Acetaten, Polyethylenglycol und Nitropropan und deren Mischungen ausgewählt ist.
- 26Composition according to any of claims 11 to 25, characterized in that it also contains up to 7 % by weight of a thickening agent. Composition selon l'une quelconque des 35 revendications 11 à 25, caractérisée en ce qu'elle contient également jusqu'à 7 % en poids d'un agent épaississant. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 25, dadurch gekennzeichnet, dass sie auch bis zu 7 Gew.-% eines Verdickungsmittels enthält.
- 27Composition according to any of claims 11 to 26, characterized in that the thickening agent is chosen from among cellulose derivatives such as hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose or hydroxypropylmethylcellulose, xanthane gum, associative thickeners of polyurethane or acrylic type, silicas, silicates such as silicates of magnesium and/or lithium optionally treated, or organophilic clays, and their mixtures. Composition selon l'une quelconque des 5 revendications 11 à 26, caractérisée en ce que l'agent épaississant est choisi parmi les dérivés de la cellulose tels que l'hydroxyméthylcellulose, l'hydroxyéthylcellulose, l'hydroxypropylcellulose ou l'hydroxypropylméthylcellulose, la gomme xanthique, des épaississants associatifs de type polyuréthane ou acrylique, les silices, les silicates de magnésium et/ou de lithium éventuellement traités, ou les argiles organophiles, et leurs mélanges. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 26, dadurch gekennzeichnet, dass das Verdickungsmittel aus Cellulosederivaten, wie Hydroxymethylcellulose, Hydroxyethylcellulose, Hydroxypropylcellulose oder Hydroxypropylmethylcellulose, Xanthangummi, assoziativen Verdickungsmitteln vom Polyurethan- oder Acryl-Typ, Siliciumdioxiden, Silicaten, wie Silicaten von Magnesium und/oder Lithium, die gegebenenfalls behandelt sind, oder organophilen Tonen und deren Mischungen ausgewählt ist.
- 28Composition according to any of claims 11 to 27, characterized in that it also contains a lubricating agent to obtain a self-lubricated system chosen from among polyethylene, polytetrafluoroethylene, MoS2, graphite, polysulfones, synthetic or natural waxes and nitrides, and their mixtures. Composition selon l'une quelconque des revendications 11 à 27, caractérisée en ce qu'elle contient également un agent lubrifiant pour obtenir un système auto-lubrifié choisi parmi le polyéthylène, le polytétrafluoroéthylène, MoS2, le graphite, les polysulfones, les cires naturelles ou synthétiques et les nitrures, et leurs mélanges. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 27, dadurch gekennzeichnet, dass sie zum Erhalt eines selbstschmierenden Systems auch ein Schmiermittel enthält, das aus Polyethylen, Polytetrafluorethylen, MoS2, Graphit, Polysulfonen, synthetischen oder natürlichen Wachsen und Nitriden und deren Mischungen ausgewählt ist.
- 29Composition according to any of claims 11 to 28, characterized in that it also contains an additive chosen from among an antifoam agent, a wetting agent, a surfactant and a biocide. Composition selon l'une quelconque des revendications 11 à 28, caractérisée en ce qu'elle contient également un additif choisi parmi un agent anti-mousse, un agent mouillant, un tensioactif et un biocide. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 28, dadurch gekennzeichnet, dass sie auch einen Zusatz enthält, der aus einem Schaumverhütungsmittel, einem Benetzungsmittel, einem Tensid und einem Biozid ausgewählt ist.
- 30Composition according to any of claims 11 to 16, characterized in that it contains:- 10 % to 40 % by weight of at least one particulate metal;- 0.5 % to 10 % of a reinforcing agent for anticorrosion of the composition chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides, optionally associated with molybdenum oxide MoO3;- up to 7 % by weight of a thickener;- 3 % to 20 % by weight of a binder;- up to 3 % by weight, preferably between 0.05 % and 2 % by weight of a sodium and/or potassium and/or lithium silicate;- up to 7 % by weight of one or more lubricating agents;- 1 % to 30 % by weight of an organic solvent or a mixture of organic solvents, and- water to make up to 100 % Composition selon l'une quelconque des revendications 11 à 29, caractérisée en ce qu'elle contient : - de 10 % à 40 % en poids d'au moins un métal particulaire ;- de 0,5 % à 10 % d'un agent de renforcement pour l'anticorrosion de la composition choisi parmi l'yttrium, le zirconium, le lanthane, le cérium, le praséodyme et le néodyme, sous la forme d'oxydes, éventuellement associé à l'oxyde de molybdène Mo03 ;- jusqu'à 7 % en poids d'un épaississant ;- de 3 % à 20 % en poids d'un liant ;- jusqu'à 3 % en poids, de préférence entre 0,05 % et 2 % en poids d'un silicate de sodium et/ou de potassium et/ou de lithium ;- jusqu'à 7 % en poids d'un ou plusieurs agents lubrifiants ;- de 1 % à 30 % en poids d'un solvant organique ou d'un mélange de solvants organiques ;et- de l'eau jusqu'à 100 %. Zusammensetzung nach irgendeinem der Ansprüche 11 bis 29, dadurch 5 gekennzeichnet, dass sie enthält: - 10 bis 40 Gew.-% mindestens eines teilchenförmigen Metalls;- 0,5 bis 10 % eines Verstärkungsmitteis für die Antikorrosion einer Beschichtungszusammensetzung, das aus Yttrium, Zirconium, Lanthan, Cer, Praseodym und Neodym in Form von Oxiden ausgewählt ist, und gegebenenfalls mit Molybdänoxid MoO3 assoziiert ist;- bis zu 7 Gew.-% eines Verdickungsmittels;- 3 bis 20 Gew.-% eines Bindemittels;- bis zu 3 Gew.-%, bevorzugt zwischen 0,05 und 2 Gew.-%, eines Natrium- und/oder Kalium- und/oder Lithiumsilicats;- bis zu 7 Gew.-% eines oder mehrerer Schmiermittel;- 1 bis 30 Gew.-% eines organischen Lösungsmittels oder einer Mischung von organischen Lösungsmitteln und- Wasser zum Auffüllen auf 100 %.
- 31Composition according to claim 30 characterized in that it also contains 0.1 % to 10 % by weight of a weak mineral acid such as boric acid. Composition selon la revendication 30, caractérisée en ce qu'elle contient également de 0,1 % à 10 % en poids d'un acide minéral faible tel que l'acide borique. Zusammensetzung nach Anspruch 30, dadurch gekennzeichnet, dass sie auch 0,1 bis 10 Gew.-% einer schwachen Mineralsäure, wie Borsäure, enthält.
- 32Composition according to either of claims 30 or 31, characterized in that it also contains 0.01 % to 1 % by weight of an anionic surfactant. Composition selon la revendication 30 ou 31, caractérisée en ce qu'elle contient également de 0,01 % à 1 % en poids d'un tensioactif anionique. Zusammensetzung nach einem der Ansprüche 30 oder 31, dadurch gekennzeichnet, dass sie auch 0,01 bis 1 Gew.-% eines anionischen Tensids enthält.
- 33Anticorrosion coating for metal parts, characterized in that it is obtained from a coating composition according to any of claims 11 to 32, by spraying, dip-draining or dip-centrifuging, the coating layer being baked by convection or infrared for example, preferably conducted at a temperature of between 79°C and 350°C, for 10 to 60 minutes, by convection. Antikorrosionsbeschichtung für Metallteile, dadurch gekennzeichnet, dass sie aus einer Beschichtungszusammensetzung nach irgendeinem der Ansprüche 11 bis 32 durch Aufsprühen, Eintauchen-Ablaufenlassen oder Eintauchen-Zentrifugieren erhalten ist, wobei die Beschichtungsschicht durch beispielsweise Konvektion oder Infrarot wärmebehandelt wird, vorzugsweise bei einer Temperatur zwischen 79°C und 350°C über 10 bis 60 Minuten mittels Konvektion durchgeführt. Revêtement anticorrosif pour parties métalliques, caractérisé en ce qu'il est obtenu à partir d'une composition de revêtement selon l'une quelconque des revendications 11 à 32, par pulvérisation, égouttage du trempé ou centrifugation du trempé, la couche de revêtement étant cuite par convection ou infrarouge par exemple, de préférence réalisée à une température comprise entre 79°C et 350°C, pendant 10 à 60 minutes, par convection.
- 34Anticorrosion coating for metal parts according to claim 33, characterized in that prior to a baking operation, the coated metal parts are dried, by convection or infrared for example, in particular by convection at a temperature in the region of 70°C for 10 to 30 minutes on line. Antikorrosionsbeschichtung für Metallteile nach Anspruch 33, dadurch gekennzeichnet, dass vor der Durchführung der Wärmebehandlung die beschichteten Metallteile zum Beispiel durch Konvektion oder Infrarot, insbesondere durch Konvektion bei einer Temperatur im Bereich von 70°C über 10 bis 30 Minuten, on-line getrocknet werden. Revêtement anticorrosif pour parties métalliques selon la revendication 33, caractérisé en ce qu'avant une opération de cuisson, les parties métalliques enduites sont séchées, par convection ou infrarouge par exemple, en particulier par convection à une température d'environ 70°C pendant 10 à 30 minutes sur une ligne.
- 35Anticorrosion coating for metal parts according to either of claims 33 to 34, characterized in that it is applied to the metal parts to be protected with a dry film thickness of between 3 µm (11 g/m2) and 15 µm (55 g/m2), preferably between 4 µm (15 g/m2) and 10 µm (40 g/m2), further preferably between 5 µm (18 m/g2) and 10 µm (40 g/m2). Antikorrosionsbeschichtung für Metallteile nach einem der Ansprüche 33 oder 34, dadurch gekennzeichnet, dass sie mit einer Trockenfilmdicke von zwischen 3 µm (11 g/m2) und 15 µm (55 g/m2), bevorzugt zwischen 4 µm (15 g/m2) und 10 µm (40 g/m2), weiter bevorzugt zwischen 5 µm (18 g/m2) und 10 µm (40 g/m2), auf die zu schützenden Metallteile aufgebracht ist. Revêtement anticorrosif pour parties 10 métalliques selon la revendication 33 ou 34, caractérisé en ce qu'il est appliqué à des parties métalliques à protéger avec une épaisseur de film sec comprise entre 3 µm (11 g/m2) et 15 µm (55 g/m2), de préférence entre 4 µm (15 g/m2) et 10 µm (40 g/m2), plus préférablement entre 5 µm (18 g/m2) et 10 µm (40 g/m2).
- 36Metal substrate, preferably in steel, having with an anticorrosion coating according to any of claims 33 to 35. Metallsubstrat, bevorzugt aus Stahl, mit einer Antikorrosionsbeschichtung nach irgendeinem der Ansprüche 33 bis 35. Substrat métallique, de préférence l'acier, ayant un revêtement anticorrosif selon l'une quelconque des revendications 33 à 35.
- 37Substrat nach Anspruch 36, dadurch gekennzeichnet, dass die Antikorrosionsbeschichtung selbst mit einer weiteren Beschichtung beschichtet ist, die ein Alkalisilicat, insbesondere ein Natrium- und/oder Kalium- und/oder Lithiumsilicat, ein Acrylharz, ein Zirconat, ein Titanat, ein Silan, ein Epoxyharz, ein Phenolharz oder eine von deren Mischungen umfasst, wobei diese Harze gegebenenfalls mit kolloidalem Siliciumdioxid assoziiert sind. Substrat selon la revendication 36, caractérisé en ce que le revêtement anticorrosif est lui-même enduit avec un autre revêtement comprenant un silicate alcalin, en particulier un silicate de sodium et/ou de potassium et/ou de lithium, un acrylique, un zirconate, un titanate, un silane, une résine époxy, une résine phénolique ou un de leurs mélanges, ces résines étant éventuellement associées avec une silice colloïdale. Substrate according to claim 36, characterized in that the anticorrosion coating is itself coated with another coating comprising an alkaline silicate, in particular a sodium and/or potassium and/or lithium silicate, an acrylic, a zirconate, a titanate, a silane, an epoxy resin, a phenol resin or one of their mixtures, these resins optionally being associated with a colloidal silica.
- 38Substrat nach Anspruch 36, dadurch gekennzeichnet, dass die Antikorrosionsbeschichtung selbst mit einer weiteren Beschichtung beschichtet ist, die ein Schmiermittel umfasst, das aus Polyethylen, Polytetrafluorethylen, MoS2, Graphit, Polysulfonen, synthetischen oder Naturwachsen und Nitriden und deren Mischungen ausgewählt ist. Substrat selon la revendication 36, caractérisé en ce que le revêtement anticorrosif est lui-même enduit avec un autre revêtement comprenant un agent lubrifiant choisi parmi le polyéthylène, le polytétrafluoroéthylène, MoS2, le graphite, les polysulfones, les cires naturelles ou synthétiques et les nitrures, et leurs mélanges. Substrate according to claim 36, characterized in that the anticorrosion coating is itself coated with another coating comprising a lubricating agent chosen from among polyethylene, polytetrafluoroethylene, MoS2, graphite, polysulfones, synthetic or natural waxes and nitrides and their mixtures.
Independent claims38
103 paragraphs in 4 sections, as filed
The present invention sets out to develop an anticorrosion coating for metal parts, preferably free of hexavalent chromium, that has anticorrosion properties.
The present invention applies to all types of metal parts, in particular in steel or cast iron or whose surface is formed of a layer of zinc or zinc alloy, which require high resistance to corrosion, on account of their intended use in the automotive industry for example. Anticorrosion coating compositions, free of hexavalent chromium, have already been recommended. Some of these compositions contain a particulate metal. The particulate metal, such as zinc and/or aluminium, is in suspension in the composition and provides the metal part with sacrificial protection against a corrosive medium. Aqueous anticorrosion coating compositions for example have been described for metal parts, containing a particulate metal, an appropriate solvent, a thickener and a binder formed of a silane. Particulate metal-based compositions have also been described whose storage stability and anticorrosion performance are improved through the incorporation of molybdenum oxide (MoO<sub>3</sub>) in the composition (<patcit id="pcit0001" dnum="FR2816641"><text>FR-2 816 641</text></patcit>).
The abstract of <patcit id="pcit0002" dnum="JP3007785A"><text>JP-03 007785</text></patcit> discloses a metal particle dispersing resin coating material containing epoxy 15 resin and one or more fine powders chosen from aluminium, Al<sub>2</sub>O<sub>3</sub>, boron nitride, titanium dioxide, Cr<sub>2</sub>O<sub>3</sub> or Y<sub>2</sub>O<sub>3</sub>.
The abstract of <patcit id="pcit0003" dnum="SU1049567"><text>SU 1 049 567</text></patcit> discloses a corrosion-resistant diffusion coating composition for nickel plated steel containing oxides of chromium, molybdenum, magnesium and aluminium, powdered aluminium and copper and potassium tetrafluoroborate.
Within the scope of the present invention, the applicant has discovered that it is possible to improve the anticorrosion properties of compositions containing particulate metal by incorporating therein at least one element chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides.
The anticorrosion performance of coating compositions containing particulate metal prove to be further improved when the above-cited elements are associated with molybdenum oxide.
The compositions containing particulate metal concerned by the present invention are in aqueous phase compositions. They are recommended when high resistance to corrosion is required.
The subject of the present invention is therefore the use of at least one element chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium in the form of oxides, as agent to reinforce the anticorrosion properties of anticorrosion coating composition containing a particulate metal, in aqueous phase, for metal parts.
A further subject of the invention is the use of at least one of the above-cited elements, optionally associated with molybdenum oxide MoO<sub>3</sub>, as reinforcing agent for the anticorrosion properties of an anticorrosion coating composition containing a particulate metal, in aqueous phase, for metal parts.
Without this interpretation being restrictive, it would seem that the presence of at least one of the above-cited elements makes it possible to reinforce the efficacy of the anticorrosion protection imparted by the particulate metal in the composition.
The particulate metal present in the composition is preferably added in powder form, of different geometric, homogeneous or heterogeneous structures, in particular spherical, laminar, lenticular forms or other specific forms.
The oxides of the above-cited elements which are used as reinforcing agents for the anticorrosion properties of the composition, are generally in powder form whose particles have a D<sub>50</sub> of less than 20 µm (the value D<sub>50</sub> means that 50% by number of the particles have a particle size of less than this value, and 50% by number of the particles have a particle size greater than this value). During the preparation of the coating composition, a prior particle grinding or dispersion step (to break up agglomerates into elementary particles) may be conducted so that the composition contains particles with a D<sub>50</sub> of less than 3 µm.
These oxides may be fully soluble, partially soluble or completely insoluble in aqueous phase phase. They may be in dispersed or solubilised form within the composition.
Yttrium oxide is advantageously in the form Y<sub>2</sub>O<sub>3</sub>.
Yttrium is used in oxide form.
The yttrium oxide Y<sub>2</sub>O<sub>3</sub> used to prepare the coating composition is generally in the form of particles having a size of between 1 µm and 40 µm, with a D<sub>50</sub> of approximately 6 to 8 µm. When preparing the coating composition, a prior particle grinding or dispersion step (to break up agglomerates into elementary particles) may be conducted so that the composition contains particles having a D<sub>50</sub> of less than 3 µm.
Zirconium oxide is advantageously in the form ZrO<sub>2</sub>.
Lanthanum oxide is preferably in the form La<sub>2</sub>O<sub>3</sub>.
Cerium oxide is advantageously in the form CeO<sub>2</sub>.
Praseodymium oxide is advantageously in the form Pr<sub>6</sub>O<sub>11</sub>.
Neodymium oxide is advantageously in the form Nd<sub>2</sub>O<sub>3</sub>.
When the composition also contains molybdenum oxide MoO<sub>3</sub> associated with one of the above-cited elements used as reinforcing agent for the anticorrosion properties of the composition, MoO<sub>3</sub> is advantageously incorporated in essentially pure orthorhombic crystalline form, having a molybdenum content of more than around 60 % by weight.
Preferably, the molybdenum oxide MoO<sub>3</sub> is in the form of particles having a size of between 1 µm and 200 µm.
Preferably, said reinforcing agent for the anticorrosion properties of the composition is associated with molybdenum oxide MoO<sub>3</sub> in a weight ratio of 0.25 < anticorrosion property reinforcing agent : MoO<sub>3</sub> < 20, preferably 0.5 < anticorrosion property reinforcing agent : MoO<sub>3</sub> < 16, further preferably 0.5 < anticorrosion property reinforcing agent: MoO<sub>3</sub> < 14.
In particular, it contains 0.5% to 2% by weight MoO<sub>3</sub>.
Preferably yttrium oxide Y<sub>2</sub>O<sub>3</sub> is used in association with molybdenum oxide MoO<sub>3</sub>. A further subject of the invention is the use of yttrium oxide Y<sub>2</sub>O<sub>3</sub> in association with molybdenum oxide MoO<sub>3</sub> in a weight ratio of 0.25 < Y<sub>2</sub>O<sub>3</sub>: MoO<sub>3</sub> < 20, preferably 0.5 < Y<sub>2</sub>O<sub>3</sub>: MoO<sub>3</sub> < 16, further preferably 0.5 < Y<sub>2</sub>O<sub>3</sub>: MoO<sub>3</sub> < 14.
A further subject of the invention concerns anticorrosion coating compositions for metal parts, comprising: <ul id="ul0001" list-style="dash" compact="compact"><li>at least one particulate metal;</li><li>a reinforcing agent for the anticorrosion properties of the composition, chosen from among yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides, optionally associated with molybdenum oxide MoO<sub>3</sub>;</li><li>a binder; and</li><li>water, optionally associated with one or more organic solvents</li></ul>
The coating composition contains at least one particulate metal, i.e. one or more particulate metals.
Advantageously, the particulate metal content lies between 10 % and 40 % by weight relative to the weight of the composition.
The particulate metal may be chosen from among zinc, aluminium, tin, manganese, nickel, their alloys, and their mixtures.
Preferably the particulate metal is chosen from among zinc, aluminium, their alloys and their mixtures. Preferably the alloys are chosen from the alloys of zinc and aluminium containing at least 3 % by weight aluminium, preferably 7 % by weight of aluminium, and the zinc and tin alloys containing at least 10 % by weight of tin.
The content of anticorrosion property reinforcing agent of the composition preferably lies between 0.5 % and 10 % by weight relative to the weight of the composition, preferably between 1 % and 8 % by weight relative to the weight of the composition, further preferably between 1 % and 7 % by weight relative to the weight of the composition.
The reinforcing agent for the anticorrosion properties of the composition is advantageously yttrium, preferably in the oxide form Y<sub>2</sub>O<sub>3</sub> or cerium preferablyin the oxide form CeO<sub>2</sub>. In addition, the reinforcing agent may be chosen among La<sub>2</sub>O<sub>3</sub>, Pr<sub>6</sub>O<sub>11</sub>, Nd<sub>2</sub>O<sub>3</sub> and ZrO<sub>2</sub>.
The reinforcing agent anticorrosion properties of the composition is advantageously associated with molybdenum oxide MoO<sub>3</sub> in a weight ratio of 0.25 < anticorrosion property reinforcing agent : MoO<sub>3</sub> < 20, preferably 0.5 < anticorrosion property reinforcing agent : MoO<sub>3</sub> < 16, further preferably 0.5 < anticorrosion property reinforcing agent : MoO<sub>3</sub> < 14.
The binder content preferably lies between 3 % and 20 % by weight relative to the weight of the composition. The binder may be of organic and/or mineral type in aqueous or organic phase. The choice of the binder depends on different criteria, among which is the baking temperature of the coating composition.
The binder is preferably chosen from among an alkoxylated silane, optionally organofunctionalised, such as γ-glycidoxypropyltrimethoxysilane or γ-glycidoxypropyltriethoxysilane, a silicone resin, a colloidal silica, a silicate of sodium and/or potassium and/or lithium, a zirconate, a titanate, an epoxy resin, a phenoxy resin, an acrylic and their mixtures.
The binder may be associated with a crosslinking agent of phenolic type, aminoplast type, or dicyandiamide type. Acid catalysts may also be added in order to catalyse the crosslinking reaction.
The composition being in aqueous phase, a colloidal silica may be used in association with resins, as binder.
The liquid phase is formed of water and may also contain up to 30 % by weight of an organic solvent or a mixture of organic water-miscible solvents.
The organic solvent or solvents are chosen in relation to the binder, so as to solubilise the latter or stabilise a dispersion thereof. The organic solvent or solvents are advantageously chosen from white spirit, alcohols, ketones, aromatic solvents and glycol solvents such as glycol ethers, in particular diethyleneglycol, triethyleneglycol and dipropyleneglycol, acetates, polyethyleneglycol and nitropropane, and their mixtures.
The coating composition may also contain a thickener if the type of application so requires, if it is to be applied by dipping-centrifuging for example.
The content of thickening agent is advantageously up to 7 % by weight relative to the weight of the composition, preferably between 0.005 % and 7 % by weight relative to the weight of the composition.
The thickening agent is advantageously chosen from among the cellulose derivatives such as hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose or hydroxypropylmethylcellulose, xanthane gum, associative thickeners of polyurethane or acrylic type, silicas, silicates such as silicates of magnesium and/or lithium optionally treated, or organophilic clays, and their mixtures.
The coating composition may also comprise a lubricating agent in sufficient quantity to obtain a self-lubricated system, chosen in particular from among polyethylene, polytetrafluoroethylene, MoS<sub>2</sub>, graphite, polysulfones, synthetic or natural waxes and nitrides, and their mixtures.
Being in aqueous phase, the coating composition may also contain other additives compatible with the binder, chosen from among an antifoam agent such as Schwego foam (emulsified hydrocarbon) from Schwegman, a wetting agent such as an ethoxylated monylphenol or an ethoxylated polyalcohol, a surfactant agent such as Aerosol TR 70 (sodium sulfosuccinate) from Cytec, and a biocide such as Ecocide D<sub>75</sub> from Progiva, and a weak acid such as boric acid to adjust the pH of the composition.
In preferred manner, the coating composition contains the following ingredients: <ul id="ul0002" list-style="dash" compact="compact"><li>10 % to 40 % by weight of at least one particulate metal;</li><li>0.5 % to 10 % by weight of an anticorrosion property reinforcing agent for the composition chosen from yttrium, zirconium, lanthanum, cerium, praseodymium and neodymium, in the form of oxides, optionally associated with molybdenum oxide MoO<sub>3</sub>;</li><li>up to 7 % by weight of a thickener;</li><li>3 % to 20 % by weight of a binder;</li><li>up to 3 % by weight, preferably 0.05 % to 2 % by weight of a sodium and/or potassium and/or lithium silicate;</li><li>up to 7 % by weight of one or more lubricating agents;</li><li>1 % to 30 % by weight of an organic solvent or a mixture of organic solvents;</li><li>optionally 0.1 % to 10 % by weight of a weak mineral acid such as boric acid;</li><li>optionally 0.01 % to 1 % by weight of an anionic surfactant; and</li><li>water to make up to 100 %.</li></ul>
If the above-cited anticorrosion property reinforcing agent is associated with molybdenum oxide, the latter preferably represents 0.5 % to 2 % by weight of the composition.
Evidently, the present invention also extends to anticorrosion coatings applied to metal parts using the above-cited compositions.
Application may be made by spraying, dipping-draining or dipping-centrifuging, the layer of coating then being subjected to a baking operation (by convection or infrared for example) preferably conducted at a temperature of between 70°C and 350°C, for approximately 10 to 60 minutes, by convection.
According to one advantageous embodiment, the anticorrosion coating derives from an application operation so involving, prior to the baking operation, a drying operation of the coated metal parts (by convection, or infrared for example), in particular by convection at a temperature in the region of 70°C for approximately 10 to 30 minutes on line.
Under these conditions, the thickness of the dry film so applied lies between 3 µm (11 g/m<sup>2</sup>) and 15 µm (55 g/m<sup>2</sup>), preferably between 4 µm (15 g/m<sup>2</sup>) and 10 µm (40 g/m<sup>2</sup>), further preferably between 5 µm (18 g/m<sup>2</sup>) and 10 µm (40 g/m<sup>2</sup>).
The present invention also extends to the metal substrate, preferably in steel, provided with an anticorrosion coating applied using the above-cited compositions.
This itself may be coated with another coating to further reinforce some properties, such as anticorrosion protection or lubrication. A coating to reinforce the anticorrosion protection may contain an alkaline silicate, in particular a sodium and/or potassium and/or lithium silicate, an acrylic, a zirconate, a titanate, a silane, an epoxy resin, a phenol resin or one of their mixtures, these resins optionally being associated with a colloidal silica. A coating for lubrication may contain a lubricating agent chosen from among polyethylene, polytetrafluoroethylene, MoS<sub>2</sub>, graphite, polysulfones, synthetic or natural waxes, and nitrides, and their mixtures.
Corrosion tests
A)
Influence of yttrium oxide (Y
<u>9</u>
O
<u>3</u>
), in aqueous phase, optionally associated with molybdenum oxide (MoO
<u>3</u>
) on anticorrosion performance.
Comparative experiments were conducted on the coating compositions given in table 1. <tables id="tabl0001" num="0001"><table frame="all"><title>Table 1</title><tgroup cols="5"><colspec colnum="1" colname="col1" colwidth="43mm" /><colspec colnum="2" colname="col2" colwidth="25mm" /><colspec colnum="3" colname="col3" colwidth="25mm" /><colspec colnum="4" colname="col4" colwidth="25mm" /><colspec colnum="5" colname="col5" colwidth="25mm" /><thead><row><entry morerows="1" valign="top">weight %</entry><entry namest="col2" nameend="col5" align="left" valign="top">composition</entry></row><row><entry valign="top">1</entry><entry valign="top">2</entry><entry valign="top">3</entry><entry valign="top">4</entry></row></thead><tbody><row><entry>Y<sub>2</sub>O<sub>3</sub><sup>1</sup></entry><entry>0</entry><entry>3.0</entry><entry>0</entry><entry>3.0</entry></row><row><entry>MoO<sub>3</sub></entry><entry>0</entry><entry>0</entry><entry>0.9</entry><entry>0.9</entry></row><row><entry>Zinc <sup>2</sup></entry><entry namest="col2" nameend="col5" align="left">23.6</entry></row><row><entry>Aluminium <sup>3</sup></entry><entry namest="col2" nameend="col5" align="left">3.0</entry></row><row><entry>Silane A187 <sup>4</sup></entry><entry namest="col2" nameend="col5" align="left">10.1</entry></row><row><entry>Sodium silicate 20N32 <sup>5</sup></entry><entry namest="col2" nameend="col5" align="left">0.9</entry></row><row><entry>Rempcopal® N4 100 <sup>6</sup></entry><entry namest="col2" nameend="col5" align="left">1.4</entry></row><row><entry>Rempcopal® N9 100<sup>7</sup></entry><entry namest="col2" nameend="col5" align="left">1.6</entry></row><row><entry>Dipropylene glycol</entry><entry namest="col2" nameend="col5" align="left">7.5</entry></row><row><entry>Aerosil® 380<sup>8</sup></entry><entry namest="col2" nameend="col5" align="left"><0.1</entry></row><row><entry>Schwego Foam® 8325<sup>9</sup></entry><entry namest="col2" nameend="col5" align="left">0.5</entry></row><row><entry>Boric acid</entry><entry colsep="0" /><entry colsep="0" /><entry colsep="0">0.8</entry><entry /></row><row><entry>Deionised water</entry><entry colsep="0" /><entry colsep="0" /><entry colsep="0">Up to 100%</entry><entry /></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>1</sup> Y<sub>2</sub>O<sub>3</sub> of 99.99 % purity (Rhodia)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>2</sup> Zinc in paste form, approx. 92 % in white spirit (80 % Alu Stapa PG Chromal VIII, from Eckart Werke)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>3</sup> Aluminium, approx. 80 % in dipropylene glycol</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>4</sup> γ-glycidoxypropyltrimethoxysilane (Crompton)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>5</sup> Sodium silicate (Rhodia)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>6</sup> Wetting agent of ethoxylated nonylphenol type (Uniqema)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>7</sup> Wetting agent of ethoxylated nonylphenol type (Uniqema)</entry></row><row rowsep="0"><entry namest="col1" nameend="col5" align="left"><sup>8</sup> Anti-sedimentation agent of silica type (Degussa)</entry></row><row><entry namest="col1" nameend="col5" align="left"><sup>9</sup> Antifoam of hydrocarbon type</entry></row></tbody></tgroup></table></tables>
Prepared samples
<ul id="ul0003" list-style="dash"><li>Treated substrate: degreased, shot-blasted steel screws</li><li>Application of coating composition: dip-centrifuging</li><li>Baking: 25 min at 310°C</li><li>Weight of coating layer: 26±2 g/m<sup>2</sup></li></ul>
The steel screws treated in this manner were tested with salt spray according to standard NFISO 9227. Results of salt spray resistance are given in table 2. <tables id="tabl0002" num="0002"><table frame="all"><title>Table 2</title><tgroup cols="4"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="27mm" /><colspec colnum="3" colname="col3" colwidth="29mm" /><colspec colnum="4" colname="col4" colwidth="52mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top">Y<sub>2</sub>O<sub>3</sub> (weight %)</entry><entry valign="top">MoO<sub>3</sub> (weight%)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>1</entry><entry>0</entry><entry>0</entry><entry>140-260</entry></row><row><entry>2</entry><entry>3</entry><entry>0</entry><entry>840</entry></row><row><entry>3</entry><entry>0</entry><entry>0.9</entry><entry>500</entry></row><row><entry>4</entry><entry>3</entry><entry>0.9</entry><entry>1300</entry></row></tbody></tgroup></table></tables>
Table 2 clearly shows that the addition of yttrium oxide Y<sub>2</sub>O<sub>3</sub> to coating compositions increases resistance to salt spray in samples treated with these compositions.
Also, when yttrium oxide Y<sub>2</sub>O<sub>3</sub> is associated with molybdenum oxide MoO<sub>3</sub>, the anticorrosion performance is further improved. An interaction is observed or a synergy effect between Y<sub>2</sub>O<sub>3</sub> and MoO<sub>3</sub>, which increases the composition's anticorrosion performance.
B)
Influence of zinc alloyed with 7 % aluminium
(Stapa Zn
4
Al
7
, from Eckkart Werke)
on anticorrosion performance
.
Comparative experiments were conducted on the coating compositions listed in table 3. <tables id="tabl0003" num="0003"><table frame="all"><title>Table 3</title><tgroup cols="2"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="143mm" /><thead><row><entry valign="top">composition</entry><entry valign="top" /></row></thead><tbody><row><entry>5</entry><entry>Identical to composition n° 3</entry></row><row><entry>6</entry><entry>Identical to composition n° 4</entry></row><row><entry>7</entry><entry>Identical to composition n°4 with the difference that 30 % by weight zinc is replaced by zinc alloyed with 7 % by weight of aluminium (Stapa Zn<sub>4</sub>Al<sub>7</sub>, from Eckart Werke).</entry></row></tbody></tgroup></table></tables>
Prepared samples
<ul id="ul0004" list-style="dash"><li>treated substrate: degreased, shot-blasted steel screws</li><li>Application of coating composition: dip-centrifuging</li><li>Baking: 25 min at 310°C</li><li>Weight of coating layer: 26 ± 2 g/m<sup>2</sup></li></ul>
The steel screws were treated with the coating compositions in table 3, then tested with salt spray according to standard NFISO 9227.
Results of resistance to salt spray are given in table 4. <tables id="tabl0004" num="0004"><table frame="all"><title>Table 4</title><tgroup cols="5"><colspec colnum="1" colname="col1" colwidth="22mm" /><colspec colnum="2" colname="col2" colwidth="26mm" /><colspec colnum="3" colname="col3" colwidth="28mm" /><colspec colnum="4" colname="col4" colwidth="41mm" /><colspec colnum="5" colname="col5" colwidth="51mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top">Y<sub>2</sub>O<sub>3</sub> (weight %)</entry><entry valign="top">MoO<sub>3</sub> (weight %)</entry><entry valign="top">Stapa Zn<sub>4</sub>Al<sub>7</sub>/Zn (weight %)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>5</entry><entry>0</entry><entry>0.9</entry><entry>0</entry><entry>450</entry></row><row><entry>6</entry><entry>3</entry><entry>0.9</entry><entry>0</entry><entry>1370</entry></row><row><entry>7</entry><entry>3</entry><entry>0.9</entry><entry>30</entry><entry>1900</entry></row></tbody></tgroup></table></tables>
Table 4 shows that the anticorrosion performance of the composition is better with alloyed zinc than with zinc.
C) Comparative example:
influence of cerium chloride in aqueous phase on anticorrosion performance
Comparative experiments were conducted on the coating compositions listed in table 5. <tables id="tabl0005" num="0005"><table frame="all"><title>Table 5</title><tgroup cols="2"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="143mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top" /></row></thead><tbody><row><entry>8</entry><entry>Identical to composition n° 3</entry></row><row><entry>9</entry><entry>Identical to composition n° 1 with the difference that 0.5 % by weight of cerium chloride is added in addition to the other ingredients</entry></row><row><entry>10</entry><entry>Identical to composition n°1 with the difference that 2 % by weight of cerium chloride is added in addition to the other ingredients</entry></row></tbody></tgroup></table></tables>
Prepared samples
<ul id="ul0005" list-style="none"><li>Treated substrate: degreased, shot blasted steel screws</li><li>Application of coating composition: dip-centrifuging</li><li>Baking: 25 min at 310°C</li><li>Weight of coating layer: 26 ± 2 g/m<sup>2</sup></li></ul>
The steel screws were treated with the coating compositions in table 5, then tested with salt spray in accordance with standard NFISO 9227.
The results of resistance to salt spray are given in table 6. <tables id="tabl0006" num="0006"><table frame="all"><title>Table 6</title><tgroup cols="3"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="41mm" /><colspec colnum="3" colname="col3" colwidth="53mm" /><thead><row><entry valign="top">composition</entry><entry valign="top">cerium chloride (weight %)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>8</entry><entry>0</entry><entry>200</entry></row><row><entry>9</entry><entry>0.5</entry><entry>500</entry></row><row><entry>10</entry><entry>2</entry><entry>770</entry></row></tbody></tgroup></table></tables>
Table 6 clearly shows that the addition of cerium chloride to coating compositions increases the resistance to salt spray of the samples treated with these compositions.
D) Comparative example:
influence of yttrium carbonate in aqueous phase on anticorrosion performance
Comparative experiments were conducted on the coating compositions listed in table 7. <tables id="tabl0007" num="0007"><table frame="all"><title>Table 7</title><tgroup cols="2"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="143mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top" /></row></thead><tbody><row><entry>11</entry><entry>Identical to composition n° 1</entry></row><row><entry>12</entry><entry>Identical to composition n° 3 with the difference that 0.8 % by weight of MoO<sub>3</sub> is present in the composition instead of 0.9 %</entry></row><row><entry>13</entry><entry>Identical to composition n° 2 with the difference that 3 % by weight of Y<sub>2</sub>O<sub>3</sub> are replaced with 6.9 % by weight of yttrium carbonate</entry></row><row><entry>14</entry><entry>Identical to composition n° 4 with the difference that 3 % by weight of Y<sub>2</sub>O<sub>3</sub> are replaced with 6.9 % by weight of yttrium carbonate and 0.8 % by weight of MoO<sub>3</sub> are present in the composition instead of 0.9%</entry></row></tbody></tgroup></table></tables>
Steel screws were prepared, treated and tested as in example 1. Results of salt spray resistance are given in table 8. <tables id="tabl0008" num="0008"><table frame="all"><title>Table 8</title><tgroup cols="4"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="45mm" /><colspec colnum="3" colname="col3" colwidth="29mm" /><colspec colnum="4" colname="col4" colwidth="53mm" /><thead><row><entry valign="top">composition</entry><entry valign="top">Yttrium carbonate (weight %)</entry><entry valign="top">MoO<sub>3</sub> (weight %)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>11</entry><entry>0</entry><entry>0</entry><entry>288</entry></row><row><entry>12</entry><entry>0</entry><entry>0.8</entry><entry>400</entry></row><row><entry>13</entry><entry>6.9</entry><entry>0</entry><entry>288</entry></row><row><entry>14</entry><entry>6.9</entry><entry>0.8</entry><entry>1296</entry></row></tbody></tgroup></table></tables>
Table 8 clearly shows that, when yttrium carbonate is associated with molybdenum oxide MoO<sub>3</sub>, the anticorrosion performance is improved. An interaction is observed or a synergy effect between yttrium carbonate and MoO<sub>3</sub>, which increases the composition's anticorrosion performance.
E)
Influence of various oxides in aqueous phase on anticorrosion performance
Comparative experiments were conducted on the coating compositions listed in table 9. <tables id="tabl0009" num="0009"><table frame="all"><title>Table 9</title><tgroup cols="2"><colspec colnum="1" colname="col1" colwidth="22mm" /><colspec colnum="2" colname="col2" colwidth="144mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top" /></row></thead><tbody><row><entry>15</entry><entry>Identical to composition n° 1</entry></row><row><entry>16</entry><entry>Identical to composition n° 3</entry></row><row><entry>17</entry><entry>Identical to composition n° 2</entry></row><row><entry>18</entry><entry>Identical to composition n° 4</entry></row><row><entry>19</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is provided by Sogemet</entry></row><row><entry>20</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is provided by Sogemet</entry></row><row><entry>21</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with CeO<sub>2</sub> provided by Rhodia</entry></row><row><entry>22</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with CeO<sub>2</sub> provided by Rhodia</entry></row><row><entry>23</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with CeO<sub>2</sub> provided by Sogemet</entry></row><row><entry>24</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with CeO<sub>2</sub> provided by Sogemet</entry></row><row><entry>25</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with La<sub>2</sub>O<sub>3</sub> provided by Rhodia</entry></row><row><entry>26</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with La<sub>2</sub>O<sub>3</sub> provided by Rhodia</entry></row><row><entry>27</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with La<sub>2</sub>O<sub>3</sub> provided by Sogemet</entry></row><row><entry>28</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with La<sub>2</sub>O<sub>3</sub> provided by Sogemet</entry></row><row><entry>29</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with Pr<sub>6</sub>O<sub>11</sub></entry></row><row><entry>30</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with Pr<sub>6</sub>O<sub>11</sub></entry></row><row><entry>31</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with Nd<sub>2</sub>O<sub>3</sub></entry></row><row><entry>32</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with Nd<sub>2</sub>O<sub>3</sub></entry></row><row><entry>33</entry><entry>Identical to composition n° 2 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with ZrO<sub>2</sub></entry></row><row><entry>34</entry><entry>Identical to composition n° 4 with the difference that Y<sub>2</sub>O<sub>3</sub> is replaced with ZrO<sub>2</sub></entry></row></tbody></tgroup></table></tables>
E-1) Electrochemistry
<ul id="ul0006" list-style="none"><li>Treated substates: degreased and sanded steel plates</li><li>Application of coating composition: by means of a hand-coater,</li><li>Baking : 25 min at 310°C,</li><li>Weight of coating layer: 26 ± 2 g/m<sup>2</sup>.</li></ul>
Polarisation resistance of the coatings was measured during one hour with SOLARTRON 1250 analyzer (Schlumberger), air exposed, with a scanning rate of ± 10mV at 0.1 mV.s<sup>-1</sup>. Results of these measurements are given in 5 table 10. The higher the value of polarization resistance, the better the anticorrosion performance of the coatings is expected. <tables id="tabl0010" num="0010"><table frame="all"><title>Table 10</title><tgroup cols="5"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="24mm" /><colspec colnum="3" colname="col3" colwidth="29mm" /><colspec colnum="4" colname="col4" colwidth="28mm" /><colspec colnum="5" colname="col5" colwidth="51mm" /><thead><row><entry valign="top">composition</entry><entry valign="top">Oxide</entry><entry valign="top">Oxide (weight%)</entry><entry valign="top">MoO<sub>3</sub> (weight %)</entry><entry valign="top">Polarisation Resistance (Ω.cm<sup>2</sup>)</entry></row></thead><tbody><row><entry>15</entry><entry>-</entry><entry>0</entry><entry>0</entry><entry>3300</entry></row><row><entry>16</entry><entry>-</entry><entry>0</entry><entry>0.9</entry><entry>9100</entry></row><row><entry>17</entry><entry>Y<sub>2</sub>O<sub>3Rhodia</sub></entry><entry>3</entry><entry>0</entry><entry>n.d.</entry></row><row><entry>18</entry><entry>Y<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0.9</entry><entry>12100</entry></row><row><entry>21</entry><entry>CeO<sub>2 RHODIA</sub></entry><entry>3</entry><entry>0</entry><entry>10600</entry></row><row><entry>22</entry><entry>CeO<sub>2 RHODIA</sub></entry><entry>3</entry><entry>0.9</entry><entry>12000</entry></row><row><entry>23</entry><entry>CeO<sub>2 Sogemet</sub></entry><entry>3</entry><entry>0</entry><entry>10000</entry></row><row><entry>24</entry><entry>CeO<sub>2 Sogemet</sub></entry><entry>3</entry><entry>0.9</entry><entry>12000</entry></row><row><entry>25</entry><entry>La<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0</entry><entry>n.d.</entry></row><row><entry>26</entry><entry>La<sub>2</sub>O<sub>3Rhodia</sub></entry><entry>3</entry><entry>0.9</entry><entry>11900</entry></row><row><entry>27</entry><entry>La<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0</entry><entry>9300</entry></row><row><entry>28</entry><entry>La<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0.9</entry><entry>10100</entry></row><row><entry>29</entry><entry>Pr<sub>6</sub>O<sub>11</sub></entry><entry>3</entry><entry>0</entry><entry>9900</entry></row><row><entry>30</entry><entry>Pr<sub>6</sub>O<sub>11</sub></entry><entry>3</entry><entry>0.9</entry><entry>9800</entry></row><row><entry>31</entry><entry>Nd<sub>2</sub>O<sub>3</sub></entry><entry>3</entry><entry>0</entry><entry>9400</entry></row><row><entry>32</entry><entry>Nd<sub>2</sub>O<sub>3</sub></entry><entry>3</entry><entry>0.9</entry><entry>10000</entry></row><row><entry>33</entry><entry>ZrO<sub>2</sub></entry><entry>3</entry><entry>0</entry><entry>9200</entry></row><row><entry>34</entry><entry>ZrO<sub>2</sub></entry><entry>3</entry><entry>0.9</entry><entry>12000</entry></row></tbody></tgroup></table></tables>
Table 10 clearly shows that the addition of oxide of yttrium, cerium, lanthanum, praseodymium, neodymium or zirconium to coating compositions increases the polarization resistance of coatings, which indicates that the corrosion resistance of the coatings will be likely increased.
E-2) Corrosion resistance
Steel screws were prepared, treated and tested as in example 1. Results of salt spray resistance are given in table 11. <tables id="tabl0011" num="0011"><table frame="all"><title>Table 11</title><tgroup cols="5"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="25mm" /><colspec colnum="3" colname="col3" colwidth="29mm" /><colspec colnum="4" colname="col4" colwidth="29mm" /><colspec colnum="5" colname="col5" colwidth="52mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top">Oxide</entry><entry valign="top">Oxide (weight%)</entry><entry valign="top">MoO<sub>3</sub> (weight %)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>15</entry><entry>-</entry><entry>0</entry><entry>0</entry><entry>288</entry></row><row><entry>16</entry><entry>-</entry><entry>0</entry><entry>0.9</entry><entry>400</entry></row><row><entry>17</entry><entry>Y<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0</entry><entry>1056</entry></row><row><entry>18</entry><entry>Y<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0.9</entry><entry>>1500</entry></row><row><entry>19</entry><entry>Y<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0</entry><entry>1296</entry></row><row><entry>20</entry><entry>Y<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0.9</entry><entry>>1656</entry></row></tbody></tgroup><tgroup cols="5"><colspec colnum="1" colname="col1" colwidth="23mm" /><colspec colnum="2" colname="col2" colwidth="25mm" /><colspec colnum="3" colname="col3" colwidth="29mm" /><colspec colnum="4" colname="col4" colwidth="29mm" /><colspec colnum="5" colname="col5" colwidth="52mm" /><thead><row><entry valign="top">Composition</entry><entry valign="top">Oxide</entry><entry valign="top">Oxide (weight%)</entry><entry valign="top">MoO<sub>3</sub> (weight %)</entry><entry valign="top">Resistance to salt spray (N° hours)</entry></row></thead><tbody><row><entry>21</entry><entry>CeO<sub>2 RHODIA</sub></entry><entry>3</entry><entry>0</entry><entry>144</entry></row><row><entry>22</entry><entry>CeO<sub>2 RHODIA</sub></entry><entry>3</entry><entry>0.9</entry><entry>720</entry></row><row><entry>23</entry><entry>CeO<sub>2 Sogemet</sub></entry><entry>3</entry><entry>0</entry><entry>144</entry></row><row><entry>24</entry><entry>CeO<sub>2 Sogemet</sub></entry><entry>3</entry><entry>0.9</entry><entry>792</entry></row><row><entry>25</entry><entry>La<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0</entry><entry>336</entry></row><row><entry>26</entry><entry>La<sub>2</sub>O<sub>3 Rhodia</sub></entry><entry>3</entry><entry>0.9</entry><entry>552</entry></row><row><entry>27</entry><entry>La<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0</entry><entry>552</entry></row><row><entry>28</entry><entry>La<sub>2</sub>O<sub>3 Sogemet</sub></entry><entry>3</entry><entry>0.9</entry><entry>864</entry></row><row><entry>29</entry><entry>Pr<sub>6</sub>O<sub>11</sub></entry><entry>3</entry><entry>0</entry><entry>504</entry></row><row><entry>30</entry><entry>Pr<sub>6</sub>O<sub>11</sub></entry><entry>3</entry><entry>0.9</entry><entry>864</entry></row><row><entry>31</entry><entry>Nd<sub>2</sub>O<sub>3</sub></entry><entry>3</entry><entry>0</entry><entry>288</entry></row><row><entry>32</entry><entry>Nd<sub>2</sub>O<sub>3</sub></entry><entry>3</entry><entry>0.9</entry><entry>1560</entry></row><row><entry>33</entry><entry>ZrO<sub>2</sub></entry><entry>3</entry><entry>0</entry><entry>288</entry></row><row><entry>34</entry><entry>ZrO<sub>2</sub></entry><entry>3</entry><entry>0.9</entry><entry>456</entry></row></tbody></tgroup></table></tables>
Table 11 clearly shows that the addition of oxide of yttrium, lanthanum, praseodymium, neodymium or zirconium to coating compositions increases the resistance to salt spray of the samples treated with these compositions. The best oxide appears to be Y<sub>2</sub>O<sub>3</sub>, but Neodynium, Praseodynium and Lanthanum give also very good results too.
Furthermore, when the oxide is associated with molybdenum oxide MoO<sub>3</sub>, the anticorrosion performance is further improved. An interaction is observed or a synergy effect between the oxide and MoO<sub>3</sub>, which increases the composition's anticorrosion performance.
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| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: PATENT MAINTAINED AS AMENDEDSTAA | STAA | EP | |
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| Definitive protectionFG2A | FG2A | ES | |
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| Translation of ep patentT3 | T3 | PL | |
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| Standard patents granted in hong kongGrantedGR | GR | HK | |
| Translation is availableAVAILABILITY OF NATIONAL TRANSLATIONSC4A | SC4A | PT | |
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| European patents granted designating irelandGrantedFG4D | FG4D | IE | |
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Numbers
- Publication
- 1644451
- Publication, DOCDB
- 1644451
- Publication, EPODOC
- EP1644451
- Application
- 47441035
- Application, DOCDB
- 04744103
- Application, EPODOC
- EP20040744103
Titles3
- German
- VERWENDUNG VON YTTRIUM, ZIRKONIUM, LANTHAN, CER, PRASEODYM UND/ODER NEODYM ALS VERSTÄRKUNGSMITTEL FÜR EINE ANTIKORROSION-BESCHICHTUNG
- English
- USE OF YTTRIUM, ZIRCONIUM, LANTHANUM, CERIUM, PRASEODYMIUM AND/OR NEODYMIUM AS REINFORCING AGENT FOR AN ANTICORROSION COATING COMPOSITION
- French
- UTILISATION D'YTTRIUM, DE ZIRCONIUM, DE LANTHANE, DE CERIUM, DE PRASEODYME ET/OU DE NEODYME COMME AGENT DE RENFORT DANS UNE COMPOSITION DE REVETEMENT ANTICORROSION
Classification
- CPC, 8
- C09D183/04
- C09D1/00
- C09D5/084
- Y10T428/265
- Y10T428/31663
- Y10T428/31529
- Y10T428/31678
- C09D5/08
- IPC, 3
- C09D5 08
- C09D5 10
- C09D183 04
Designated states28
- Contracting states, 28
- Austria
- Belgium
- Bulgaria
- Switzerland
- Cyprus
- Czechia
- Germany
- Denmark
- Estonia
- Spain
- Finland
- France
- United Kingdom
- Greece
- Hungary
- Ireland
- Italy
- Liechtenstein
- Luxembourg
- Monaco
- Netherlands (Kingdom of the)
- Poland
- Portugal
- Romania
and 4 moreShow fewer
- Sweden
- Slovenia
- Slovakia
- Türkiye