Bath for electrodeposition of zinc or zinc nickel alloy on a conducting substrate having acid pH and containing zinc chloride, useful to protect parts of iron, cast iron or steel, comprises polyvinylimidazole and zinc in aqueous solution

摘要

Bath for electrodeposition of zinc or zinc nickel alloy on a conducting substrate having an acid pH and containing zinc chloride and optionally nickel chloride hexahydrate, comprises polyvinylimidazole (0.1-30 g/l, preferably 1-10 g/l), zinc (>= 10 g/l, preferably 10-60 g/l) and optionally nickel (>= 5 g/l, preferably 10-50 g/l), in aqueous solution.