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Repassivation Method to Predict Long Term Integrity of Low Alloy Titanium for Nuclear Waste Package

Published online by Cambridge University Press:  28 February 2011

Shigeo Tsujikawa  and
Yoichi Kojima
Shigeo Tsujikawa
Affiliation:
Faculty of Engineering, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo, 113 Japan
Yoichi Kojima
Affiliation:
Faculty of Engineering, The University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo, 113 Japan
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Abstract

Long term corrosion resistance is evaluated for G-2 and G-12 titanium as a candidate of the high-level nuclear waste packages. The repassivation potential for crevice corrosion, ER, in comparison with the well known spontaneous potential, ESP, of a metal passivated in given environment, allows conclusions to be drawn whether it performs “permanent” or does not. This repassivation method is extended to determine critical conditions in terms of NaCl concentration and temperature for specimens kept at an electrode potential which is more noble than ER and is included in ESP ranges. Thus obtained NaCl concentration - temperature - crevice corrosion map could predict critical conditions for the titanium used in geologic formations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 212: Symposium P – Scientific Basis for Nuclear Waste Management XIV , 1990 , 261
Copyright
Copyright © Materials Research Society 1991

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References

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