The electrochemistry of intermetallic particles and localized corrosion in Al alloys |
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Authors: | R G Buchheit R K Boger M C Carroll R M Leard C Paglia J L Searles |
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Affiliation: | (1) the Department of Materials Science and Engineering, The Ohio State University, USA;(2) The Proctor and Gamble Company, USA |
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Abstract: | Intermetallic particle electrochemistry plays significant role in localized corrosion and stress-corrosion cracking of aluminum
alloys. This article presents specific examples from recent and on-going studies of stress-corrosion cracking in Al-Mg alloys
and localized corrosion in Al-Cu alloys. The common approach in these examples is an explicit accounting of the intermetallic
particle-dissolution characteristics, which is developed by measuring the electrochemical behavior of bulk analog compounds.
Findings from these types of measurements combined with results from new and advanced small-length scale measurements confirm
some of the established ideas about localized corrosion in aluminum alloys, but also lead to new insights that are important
for a thorough understanding of corrosion damage accumulation.
For more information, contact R.G. Buchheit, The Ohio State University, Department of Materials Science and Engineering, 477
Watts Hall, 2041 College Road, Columbus, Ohio 43210; (614) 292-6085; fax (614) 292-9857; e-mail buchheit.8@osu.edu. |
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