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TitleMechanistic studies of atmospheric pitting corrosion of stainless steel for ILW containers
Publication TypeJournal Article
Year of Publication2014
AuthorsDavenport, A.J., Guo L., Mi N., Mohammed-Ali H., Ghahari M., Street S.R., Laycock N.J., Rayment T., Reinhard C., Padovani C., and Krouse D.P.
JournalCorrosion Engineering Science and Technology
Pagination514 - 520
Date Published2014
ISSN1478422X (ISSN)
KeywordsMechanistic studies, Stainless steel, X ray microtomography
AbstractAtmospheric pitting corrosion of stainless steel was examined with synchrotron X-ray microtomography, laboratory based tests and electrochemical measurements in order to provide a mechanistic basis for the development of corrosion prediction models. It was found that the morphology of corrosion pits was affected by the presence of residual ferrite, and some pits showed dense covers that may affect pit stability. Fluctuations in relative humidity may lead to partial or complete repassivation of pits, sometimes leading to the formation of new pits. Electrochemical measurements in artificial pits containing concentrated salt solutions show a strong dependence of the diffusion limited current density on chloride concentration. © 2014 Institute of Materials, Minerals and Mining.

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