Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Effect of NaCl on Rusting of Steel in Wet and Dry Corrosion Cycle
Toshiyasu NISHIMURAKen-itsu TANAKAYoshiaki SHIMIZU
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1995 Volume 81 Issue 11 Pages 1079-1084

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Abstract

Relation between corrosion resistance of steel and NaCl concentration has been studied by wet and dry corrosion test. Corrosion products of steel were directly analyzed in wet and dry corrosion test using In-situ X-ray diffraction equipment. Corrosion rate of steel increased with increasing NaCl concentration. The reduction reaction of rust accelerated corrosion of steel. Ratio of β-FeOOH in rust tends to increase with increasing NaCl concentration. β-FeOOH is reduced to amorphous intermediate oxide in wet cycle, and reproduced in dry one. Amorphous intermediate oxide is reduced to Fe3O4 in constant current reduction, but hardly reduced to that in actual wet and dry corrosion cycle.

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© The Iron and Steel Institute of Japan
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