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Mechanisms of Inhibition of Crevice Corrosion in Alloy 22

Published online by Cambridge University Press:  19 October 2011

Raul B. Rebak
Raul B. Rebak*
Affiliation:
rebak1@llnl.gov, Lawrence Livermore National Laboratory, Chemistry and Materials Science, 7000 East Ave, L-631, Livermore, CA, 94550, United States, 925-422-1854, 925-422-2105
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Abstract

Alloy 22 may be susceptible to crevice corrosion in chloride-containing environments, especially at temperatures above ambient. The presence of oxyanions, especially nitrate, minimizes or eliminates the susceptibility of Alloy 22 to crevice corrosion. Other anions such as sulfate, carbonate and fluoride were also reported as inhibitors of crevice corrosion in Alloy 22. It is argued that the occurrence of crevice corrosion is due to the formation of hydrochloric acid solution in the creviced region. Inhibitors act by eliminating the occurrence of hydrochloric acid or by hampering its action.

Keywords

corrosionNiCl
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN08-04
Copyright
Copyright © Materials Research Society 2007

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