| abstract |
methodnfor coating steel products, wherein a surface of thenSteel product firstncoated with a zinc or zinc alloy coatingnand in which a magnesium or zinc alloy coating isnor magnesium alloy layer is applied, characterizednthat before applying the magnesium or magnesium alloy layerna chemical preconditioning is carried out, in which the surface with anPre-conditioner rinsednwhich is a solutionnan alkali phosphate, an alkaline earth phosphate or an ammonium phosphatenand / or ascorbic acid,na salt of ascorbic acidnor a derivative thereof, on the first metallic layernremove existing oxides and / or a new formation of oxidesnto prevent as far as possible. |