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The Corrosion Behavior of Nickel-base Austenitic Alloys for Nuclear Hydrogen Generation

Published online by Cambridge University Press:  01 February 2011

Rama S Koripelli ,
Joydeep Pal  and
Ajit K Roy
Rama S Koripelli
Affiliation:
rs_mech@yahoo.com, UNLV, Mechanical Engineering, 1600E Rochelle Ave, apt 301, las vegas, NV, 89119, United States, 7022807297
Joydeep Pal
Affiliation:
rs_mech@yahoo.com, UNLV, Mechanical Engineering, 1600E Rochelle Ave, apt 301, las vegas, NV, 89119, United States, 7022807297
Ajit K Roy
Affiliation:
rs_mech@yahoo.com, UNLV, Mechanical Engineering, 1600E Rochelle Ave, apt 301, las vegas, NV, 89119, United States, 7022807297
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Abstract

Three nickel-base austenitic alloys, namely Alloy C-22, Alloy C-276 and Waspaloy have been tested for evaluation of their corrosion resistance in an acidic solution at ambient and elevated temperatures. The results of stress corrosion cracking studies indicate that none of these materials did exhibit any failure at constant load. The cracking susceptibility determined by the slow strain rate technique was gradually enhanced at higher temperatures showing reduced ductility and true failure stress. The critical potentials determined by the polarization technique, became more active (negative) with increasing temperature. The fractograpic evaluations by scanning electron microscopy (SEM) revealed ductile failure in Alloys C-22 and C-276. However, Waspaloy showed brittle failure at elevated temperature.

Keywords

corrosionscanning electron microscopy (SEM)optical metallography
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 929: Symposium II – Materials in Extreme Environments , 2006 , 0929-II05-06
Copyright
Copyright © Materials Research Society 2006

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References

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