Procedure for the manufacture of a steel flake product with a metallic coating based on zinc and a phosphatic coating produced on a surface of the metallic coating and such a steel flake product

摘要

The invention makes it possible to carry out, within a short period of time, the phosphation of steel flax products in the manufacture of steel flakes with a Zn-based protective coating. To this end, the invention shall take at least the following steps:(a) the provision of a steel flap product with at least one side of a protective metal layer based on zinc;(b) at least partial removal of a native oxide layer on the surface of the metallic protective layer by wetting that surface with an acidic solution;(c) optionally rinse the surface of the protective metal layer moistened with the acid solution with an aqueous solution;(d) activate the surface of the protective metal layer by applying an aqueous activation solution to the surface of the protective metal layer;(e) Phosphate the activated surface of the protective metal layer by applying an aqueous phosphate solution to the activated surface of the protective metal layer.