ELECTROPLATING METHOD OF ALLOY COMPOSED OF IRON GROUP METAL AND Mo AND/OR W

摘要

Disclosed is an electroplating method of an alloy composed of an iron group metal and Mo and/or W which enables to continuously and stably obtain good adhesion between an enamel layer and a steel sheet. In electroplating of an alloy composed of one or more metals selected from the group consisting of Ni, Co and Fe, and Mo and/or W, plating is carried out while maintaining the plating bath composition within an appropriate range by reproducing lower oxides of Mo and/or W increased in the plating bath through continuous power distribution into hexavalent Mo ions and/or hexavalent W ions by adding an oxidant into the plating bath of the alloy composed of one or more metals selected from the group consisting of Ni, Co and Fe, and Mo and/or W every certain time.