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Modeling localized corrosion with an effective medium approximation

Author(s)
Cross, Samuel Robert; Schuh, Christopher A
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Abstract
A model of localized corrosion is developed, in which the effective local properties of the electrolyte are adjusted based on a continuously variable porosity parameter that permits penetration of the electrolyte into the corroding medium in an average sense. The model is applied to corrosion of multilayer aluminum alloy electrodeposits in salt water, and compared to experimental results on several different coatings. The model can accurately reproduce a number of phenomena specific to localized corrosion, including the effects of vari ations in film thickness, dissolution through a barrier, and relative lifetimes of different coatings in immersion conditions.
Date issued
2017-02
URI
http://hdl.handle.net/1721.1/120476
Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Corrosion Science
Publisher
Elsevier
Citation
Cross, Samuel R., and Christopher A. Schuh. “Modeling Localized Corrosion with an Effective Medium Approximation.” Corrosion Science 116 (February 2017): 53–65.
Version: Author's final manuscript
ISSN
0010938X

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