粗銅中に存在する化合物の陽極分極特性について

抄録

Anodic polarization curves of the compounds Cu₂S, Cu₂Se, Cu₂Te, Cu₃As, Ag₂S, Ag₂Se, Ag₂Te, AgCuSe, and NiO in copper sulfate-sulfuric acid solution were studied with the aid of the potentiostatic technique. Some anodic oxidation mechanisms of these compounds have been made clear. It is shown that the oxidation potentials of copper compounds are slightly more noble than that of copper, but the polarization curves of silver compounds are shifted considerably to the noble side. There is a possibility that copper arsenide dissolves at some electrolytic conditions of copper refining. Nickel oxide does not dissolve on account of passivity.