Abstract
In a previous paper the kinetics of the deposition and dissolution of indium was studied by a galvanostatic method of single current pulses. At c.d. higher than a change in the mechanism of the deposition and dissolution of indium was observed. To study the phenomenon, the cathodic and anodic polarization in solutions of indium sulfate with pH 2.5, pH 1.56, and pH 1.0 was investigated as well as the deposition of hydrogen at cathodic polarization in equivalent sulfate solution without indium. After cathodic polarization at chosen c.d.'s, the polarographic investigation of the indium sulfate solution was done. Analysis of the experimental data obtained by cathodic polarization in indium sulfate solution at higher c.d. points to the reaction step as rate‐determining. For anodic polarization one can conclude that a disproportionation reaction occurs with increasing c.d., and that the first anodic reaction step becomes rate‐determining.
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