Elongation of Lifetime of Ni-W Alloy Electroplating Bath by Using Sacrificial Organic Compound

Ni-W alloy plating is expected as a substitute for Cr plating, because of its hard, superior corrosion resistance and resistance to softening at high temperature. The effect on suppression of electrolytic oxidation of organic compound by the addition of sacrificial organic compound in Ni-W alloy plating was investigated by electrochemical measurements and a plating experiment. It became clear that the addition of sacrificial organic compound to electrolyte suppress the decomposition of organic complex agent on an insoluble anode.