PLAIN OR ZINC-PLATED STEEL PLATE COATED WITH A ZINC OR ZINC ALLOY LAYER COMPRISING A POLYMER, AND METHOD FOR MAKING SAME BY ELECTROPLATING

摘要

The invention concerns a plain or zinc-plated steel plate, additionally coated on at least one of its surfaces with a single zinc or zinc alloy layer containing 0.15 to 1 wt. % of a polymer consisting of 6 to 150 identical or different units of general formula: (CH2C(R)(CONH2))-, with R = H or CH3 and optionally comprising polyallyl units, and a method for making said plates by electroplating in sulphate baths.