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Effect of the Composition of Nickel Alloys on the Anodic Behavior in Aqueous Solutions of Chloride and Bicarbonate

Published online by Cambridge University Press:  28 March 2012

Natalia S. Zadorozne ,
Ricardo M. Carranza ,
Mabel C. Giordano ,
Alicia E. Ares  and
Raul B. Rebak
Natalia S. Zadorozne
Affiliation:
CONICET, Argentina.
Ricardo M. Carranza
Affiliation:
Departamento Materiales, Comisión Nacional de Energía Atómica, Argentina. Instituto Sabato, UNSAM / CNEA, Argentina.
Mabel C. Giordano
Affiliation:
Departamento Materiales, Comisión Nacional de Energía Atómica, Argentina. Instituto Sabato, UNSAM / CNEA, Argentina.
Alicia E. Ares
Affiliation:
Universidad Nacional de Misiones, Posadas, Misiones, Argentina
Raul B. Rebak
Affiliation:
GE Global Research, Schenectady, NY, USA.
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Abstract

The stress corrosion cracking (SCC) of Alloy 22 in concentrated ground waters was associated to the presence of bicarbonate and chloride ions in the water. SCC occurred when an anodic peak appeared in the polarization curve of Alloy 22. The aim of this work was to investigate further which element in Alloy 22 was responsible for the anodic peak and therefore SCC. Four alloys (22, 800H, 600 and 201) were mainly used for this study. It has been found that Alloy 22, 600 and 800H show anodic peaks; which are affected by chloride and temperature. It is likely that the anodic peak is associated to the presence of either chromium, molybdenum or both.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1475: Symposium NW – Scientific Basis for Nuclear Waste Management XXXV , 2012 , imrc11-1475-nw35-p70
Copyright
Copyright © Materials Research Society 2012

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References

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