部分スズめっき鋼板上への金属クロム析出挙動の検討

抄録

The mechanism of the electrodeposition of metallic chromium on partially tin-coated steel sheet is discussed from the viewpoint of cathodic polarization behavior in the plating solution. The current density required for stable deposition of metallic chromium is higher on tin than on steel, doubtless due to the higher hydrogen overvoltage of tin. Lengthening of the period after tin plating and pre-electrolysis under the third peak region in the chromium plating bath are both effective in facilitating the formation of cathodic film and in accelerating the resultant deposition of metallic chromium.