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Crevice Corrosion - NaCl Concentration Map for Alloy 625 at Elevated Temperature

Published online by Cambridge University Press:  15 February 2011

Toshiaki Amano ,
Yoichi Kojima  and
Shigeo Tsujikawa
Toshiaki Amano
Affiliation:
The University of Tokyo, Faculty of engineering, Department of Metallurgy 7–3–1 Hongo, Bunkyo-ku, Tokyo, 113 JAPAN
Yoichi Kojima
Affiliation:
The University of Tokyo, Faculty of engineering, Department of Metallurgy 7–3–1 Hongo, Bunkyo-ku, Tokyo, 113 JAPAN
Shigeo Tsujikawa
Affiliation:
The University of Tokyo, Faculty of engineering, Department of Metallurgy 7–3–1 Hongo, Bunkyo-ku, Tokyo, 113 JAPAN
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Abstract

The repassivation potentials, Er.crev’s, for metal/metal-crevice of Alloy 625 were determined in 0.3–10% NaCl solutions for temperatures up to 250 C. The Er.crev’s were found to be the least noble at temperatures around 100 and 125 C. The Er.crev became more noble as temperature increased; this tendency was particularly strong in diluted solutions. Based on the experimental data, a crevice corrosion map showing the critical condition in terms of temperature and NaCl concentration was presented. As for the map, a wide repassivation region was found in elevated temperatures, similar to that of commercially pure titanium, C.P.Ti.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 727
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Tsujikawa, Shigeo and Kojima, Yoichi, in Scientific Basis for Nuclear Waste Management XIV, edited by Abrayano, T. Jr and Johnson, Lawrence H. (MRS, 1991) pp.261–268 Google Scholar
2. Tsujikawa, Shigeo and Kojima, Yoichi, in Scientific Basis for Nuclear Waste Management XVI, edited by Interrante, Charles G. and Pabalan, Roberto T. (MRS, 1993) pp.311–316 Google Scholar
3. Tsujikawa, S. and Okayama, S., Corrosion Science, 31, 441 (1990)Google Scholar