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Interrelation between Partial Reactions during Alternating-Current Polarization of Copper in Chlorid |
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18.09.2008 г. |
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Interrelation between Partial Reactions during Alternating-Current Polarization of Copper in Chloride Environments O. Yu. Kuksina, V. Yu. Kondrashin, and I. K. Marshakov Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 Russia e-mail:
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Received October 1, 2004 Abstract — Infralow-frequency alternating-current polarization of a copper electrode in chloride environments causes an increase in the pH of a near-electrode layer, as well as the concentration of hydroxide ions adsorbed at the electrode, during the cathodic half-period. This facilitates the oxidation of copper during the subsequent anodic half-period and changes the character of the oxidation products, that is, instead of soluble, insoluble compounds form. During the anodic half-period, consumption of hydroxide ions restores the initial pH in a near-electrode layer. The oxidation products of copper may become soluble again.
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