CORROSION ENGINEERING DIGEST
Online ISSN : 1884-1155
Print ISSN : 0010-9355
ISSN-L : 0010-9355
Effect of Sulfate and Chloride Ions on Corrosion Inhibition of Mild Steel by Chromate
Shizuo KawamuraNoriaki TanakaMasaichi Nagayama
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1973 Volume 22 Issue 12 Pages 500-503

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Abstract

Corrosion rates of mild steel in chromate solutions containing sulfate or chloride ions were estimated at a pH of 8 by the polarization resistance method. The critical concentration of chromate above which corrosion rate is below 1mdd increased with increase of sulfate or chloride concentration. Presence of Ca2+ ions did not affect the value of the critical concentration. It was demonstrated for waters from different sources that a rough estimation of the critical concentration of chromate could be made preliminarily as far as the concentrations of sulfate and chloride are known.

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