Abstract
To clarify the anodic reaction mechanism of copper-sulfide and chalcopyrite in acidic solution, measurements of the electrode potentials and the anodic polarization curves, and the galvanostatic anodizing were carried out. From the experimental results obtained, the following became clear: (1) The electrode potentials of copper-sulfide and chalcopyrite were more positive than that of the each component metal, and this agrees with the general tendency already given. (2) Both sulfides were anodically dissolved in sulfuric acidic solution, and the sulfur of sulfides was mostly oxidized to elemental sulfur according to the following equation, respectively:
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