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On the Mechanism of Rust Exfoliation in Marine Environments
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2017 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 164, no 2, C8-C16 p.Article in journal (Refereed) Published
Abstract [en]

Based on exposures in chloride-rich field and laboratory atmospheres, a mechanism of rust exfoliation of carbon steel is proposed. Key ingredients are structural transformations between main rust phases (goethite, lepidocrocite, spinel oxides and akageneite) during varying exposure conditions and their large difference in molar volume with a factor of five between the most compact and least compact rust phase. Akaganeite transformed to spinel results in volume contraction, lepidocrocite to spinel in volume expansion and in both cases stresses are introduced in the rust multilayer. At sufficiently high chloride deposition rates (similar to 300 mg/m(2).d), the rust multilayer eventually detaches resulting in rust exfoliation.

Place, publisher, year, edition, pages
ELECTROCHEMICAL SOC INC , 2017. Vol. 164, no 2, C8-C16 p.
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Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-206309DOI: 10.1149/2.0131702jesISI: 000397850800016OAI: oai:DiVA.org:kth-206309DiVA: diva2:1093356
Note

QC 20170505

Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-05-05Bibliographically approved

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Odnevall Wallinder, IngerLeygraf, Christopher
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