Concerning the Distribution of the Overpotential during Anodic Oxide Film Growth
- 1 May 1990
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 137 (5) , 1496-1501
- https://doi.org/10.1149/1.2086699
Abstract
Data obtained for the repassivation of a number of metals (Fe, Cr, Ni, Ta, and W) by oxide film growth provide evidence for the separation of the applied overpotential into two regions: one lies across the oxide film itself and the other across either of the metal/film or film/electrolyte interface. The former controls transport through the oxide in accordance with the classical high field ion conduction equation; the latter controls the metal oxidation reaction and follows a Tafel relationship. The kinetic parameters associated with each of the processes are presented.Keywords
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