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http://dx.doi.org/10.5229/JKES.2008.11.3.184

Inhibition Effects of Chromate, Phosphate, Sulfate, and Borate on Chloride Pitting Corrosion of Al  

Lee, Ho-Chun (Battery R&D, LG Chem Ltd.)
Isaacs, Hugh S. (Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory)
Publication Information
Journal of the Korean Electrochemical Society / v.11, no.3, 2008 , pp. 184-189 More about this Journal
Abstract
Inhibitive effects of chromate, phosphate, sulfate, and borate on chloride pitting corrosion of Al have been investigated using cyclic voltammetry. During the anodic oxide growth, the critical concentration of chloride for pit initiation decreased in the order: chromate > phosphate > sulfate > borate, and the maximum pitting current density increases in the reverse order: chromate < phosphate < sulfate < borate. The decreasing pitting current density was observed in the successive polarization cycles, which was attributed to the aging of Al oxides and field relaxation at oxide/solution interface.
Keywords
Aluminum; Pitting; Chloride; Inhibition; Cyclic voltammetry;
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