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Improvements in an acidic aqueous composition for the electrowinning of nickel
Improvements in an acidic aqueous composition for the electrowinning of nickel
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机译:用于镍电积的酸性水性组合物的改进
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摘要
Plating defects may occur during the electrodeposition of nickel using compositions containing primary and secondary brighteners. According to the invention such defects are avoided by including 0.01 to 1 g/l of a sulfonated acetylenic compound or a salt of such a compound in an aqueous acidic nickel plating bath containing 0.2 to 10 g/l of saccharin, and 20 to 500 parts per million of Zn ions. The acetylenic bond and the sulfonate radical of the sulfonated acetylenic compound are connected by a carbon chain of at least one carbon atom and not more than 6 carbon atoms. The invention relates to the composition of such a bath, to the method of bright nickel plating using such a bath and to compositions for forming the bath.
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