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Perspectives on Localized Corrosion in Thin Layers of Particulate

Published online by Cambridge University Press:  19 October 2011

Joe H. Payer  and
Robert G. Kelly
Joe H. Payer
Affiliation:
[email protected], Case Western Reserve University, Materials Science & Engineering, 10900 Euclid Ave., 404 White Bldg., Cleveland, OH, 44106, United States, 216-368-4218, 216-368-2981
Robert G. Kelly
Affiliation:
[email protected], University of Virginia, Materials Science & Engineering, 116 Engineer's Way, Materials Science Building 323, PO Box 400745, Charlottesville, VA, 22904-4745, United States
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Abstract

The requirements for the initiation and propagation of localized corrosion are reviewed, and the stability criteria for sustained localized corrosion are discussed. A conceptual framework is applied to a specific scenario of a hot metal surface covered by a thin layer of particulate containing dissolvable salts in the presence of air of limited humidity. A number of processes are demonstrated to affect the crevice corrosion propagation, stifling and arrest. Contributions of the particulate layer properties, the anode, cathode and coupled processes are identified, showing that any of these can control localized corrosion propagation. The findings add to the technical basis for the analysis of localized corrosion by a decision tree methodology.

Keywords

corrosionalloythin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN08-01
Copyright
Copyright © Materials Research Society 2007

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References

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