期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 165, 期 11, 页码 C807-C820出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0931811jes
关键词
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资金
- Office of Naval Research [N00014-14-2-0002]
- University of Michigan College of Engineering
- NSF [DMR-9871177, DMR-0723032]
- University of Michigan
The intermetallic phases in AA7075-T6, including the nm-scale precipitate MgZnCu and 10-mu m size Mg2Si, S -phase, Al7Fe2 Cu(Mn), and Al-15(FeMn)(3)(SiCu)(2), were identified and evaluated with respect to chemical composition, structure, and relative nobility. Evaluation of each major intermetallic particle (IMP) after exposure of the alloy to electrolyte allowed assessment of their roles in the localized corrosion. Different corrosion scenarios, including dealloying, trenching, particle etching out/dissolution, localized anodic and cathodic behavior of the IMPs, and corrosion sequences were studied. Combined with previous studies, the results advance the understanding of the electrochemical properties and the associated mechanisms of localized corrosion in aluminum alloys. (C) The Author(s) 2018. Published by ECS.
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