Copper corrosion and anodic electrodissolution mechanisms in naturally aerated stagnant 0.5 M H2SO4H2SO4

Mechanisms of copper corrosion and electrodissolution in naturally aerated, stagnant 0.5 M H2SO4H2SO4 were investigated by means of electrochemical techniques, compared with deaerated measurements. The role of dissolved oxygen was suggested, and three models were proposed in -0.05∼0.15-0.05∼0.15 V vs. SCE range. Near to corrosion potential, chemical redox between cuprous intermediate and oxygen reduction reaction (ORR) intermediate accelerated copper corrosion, and corrosion rate was controlled by a combined cathodic kinetic–anodic diffusion process. In low and high potential ranges, chemical redox, occurred between cuprous intermediate and oxygen molecule, synergistically accelerated the electrodissolution of copper.