Patent ID: 8636854
Filing Date: 2014-01-28
Classification: C23C

Abstract:
1. A method for coating a flat steel product including alloy constituents with a metallic coating, wherein the flat steel product is initially subjected to a heat treatment, in order then, in the heated state, to be hot-dip coated with the metallic coating in a melting bath including at least 85% zinc and/or aluminum, wherein the heat treatment comprises the following method steps: a) heating the flat steel product in a reducing atmosphere with an H b) converting said same surface from step a) into an iron oxide layer by a heat treatment of the flat steel product lasting 1 to 10 secs. at a temperature of >750° C. to 850° C. in a reaction chamber integrated into a continuous furnace, with an oxidizing atmosphere with an O c) then annealing the flat steel product in a reducing atmosphere with an H d) then cooling the flat steel product to melting bath temperature.