Method for coating the inner surface of a gun barrel

The invention relates to a method for the internal coating of a gun barrel (2), on its inner surface (25) to prevent erosion at least in a partial area of ​​a chromium layer (26) is applied by electroplating. DOLLAR A around the weapon barrel (2) provided with an inner coating, is achieved with the that the pipe erosions are lower than for similar weapon barrels, the invention proposes that for the electrolytic deposition of the chromium layer (26) by means of a pulsed electrical current (8 ) to the number of electric current pulses (9-15) corresponding number of part chromium layers (17-23) is deposited on each other and that the pulse duration (16) of the electric current (8) is selected such that the crystallite growth during the individual deposited portion chromium layers ( 17-23) is interrupted before its natural end and the chromium layer (26) has a globular structure polytropic.