Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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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)
  • Published : 2008.08.31
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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.

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References

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