Modeling the environment influence on the anodic metal dissolution

The influence of the electrolyte composition on the anodic indium dissolution is studied by the RRDE method. A model is designed for the active dissolution of indium according to the hydroxide and anion mechanisms. The model is used for calculating polarization curves and the limiting current of the oxidation of intermediate ions of univalent indium on the ring electrode at different solution compositions and electrode rotation rates. The calculated curves agree well with the experimental ones, which confirms validity of the model. The paper illustrates the way one can analyze the active metal dissolution kinetics in the case of the hydroxide and anion mechanisms.