Anodic dissolution of copper in perchlorate solutions of different ionic strength

By means of the potentiodynamic method, the anodic behavior of copper is studied in perchlorate solutions in a wide range of pH and ClO4− ion concentrations. The activating action of ClO4− ions in the anodic process is associated with their weak ability to form hydrates, which facilitates their incorporation into the electrical layer and displacement of OH− ions from the surface complexes. The schemes of mechanisms proposed for the copper anodic dissolution imply the possibility of the formation of intermediate adsorption complexes with participation of ClO4− ions. By the technique of nonlinear regression analysis, the constants in the kinetic equations are calculated for the proposed schemes.