Corrosion Mechanisms of Copper Investigated by Channel Flow Electrode Method and Electrochemical Impedance Spectroscopy

用沟道流动电极法和交流阻抗谱研究了铜在多种电解液中的阳极溶解机理。在测定极化曲线的同时，对从铜工作电极上溶解的铜和铜离子进行了检测。根据上述实验得到的反应参数，对铜的溶解机理进行了详细的讨论。将电解液中离子的作用归类为：促进溶解速率的物种：CL^-，SO_4^&lt；2-&gt；，H_2PO_4^-，SO_2^-，NO_3^-，NO_2^-，ClO^-；抑制溶解速率的物种：HPO_4^-；2-gt；、NH_4^+。

Anodic dissolution mechanisms of copper in many kinds of electrolyte solutions were investigated by a channel flow electrode method and an electrochemical impedance spectroscopy. The detections of cuprous and cupric ions, which are dissolved from copper working electrode, are carried out simultaneously with the measurements of polarization curves. On the basis of reaction parameters obtained by the above-mentioned experiments, the detail dissolution mechanisms of copper were discussed.The roles of ions presenting in the electrolyte solutions were classified into as follows.The species accelerating the dissolution rate : Cl^-,SO_4^<2->,H_2PO_4^-,SO_2^-,NO_3^-,NO_2^-,ClO^-.The species inhibiting the dissolution rate : HPO_4^<2->.The species whose role depends on the environment : HCO_3^-,CO_3^<2->,NH_4^+.