The corrosion of In-Bi alloys in HCl was studied using x-ray, scanning electron microscopy, atomic absorption spectroscopy, and cyclic voltammetry techniques. In deaerated 3N HCl solutions, the selective dissolution of indium was the predominant mechanism in the corrosion of In-Bi alloys. The corrosion was always accompanied by a phase change on the surface, and the corrosion rates of In-Bi alloys were found to increase in the presence of oxygen.

The corrosion potential values indicated that the corrosion of In-Bi alloys was cathodically controlled, and the occurrence of preferential or simultaneous dissolution in In-Bi alloys was also dependent on potential.

Subject
Electric current, Anode potential, Corrosion rate, Metal surfaces, Structures, Dissolution, Voltammetry, Anodic current, Surface layers, Alloys, Dealloying, Corrosion potential, Electrode potential
National Association of Corrosion Engineers
1985
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