Scanning Electrochemical Microscopy of Precursor Sites for Pitting Corrosion on Titanium
- 1 September 1993
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 140 (9) , L142-L145
- https://doi.org/10.1149/1.2220897
Abstract
Scanning electrochemical microscopy, SECM, of oxide‐covered titanium foils (∼50 Å oxide thickness) immersed in potassium bromide solutions is reported. Electrogeneration of bromine at the film is shown to occur rapidly at a few microscopic surface sites. The regions of intense faradaic activity observed in SECM images correlate directly with the location of pit nucleation. The direct correspondence between sites of faradaic activity and oxide breakdown provides a means of identifying precursor sites for pit formation.Keywords
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