Abstract
A measurement procedure of the surface temperature in high-rate electrochemical processes, using rotating and fixed disk electrodes, is described. The activation energy and its dependence on potential during anodic copper dissolution in nitrate solutions were obtained by surface temperature measurements. It is shown that the transition to transpassive copper dissolution in NH 4NO 3 solution is caused by the establishment of a critical surface temperature corresponding to the transition to thermokinetic instability.
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