Anodising and corrosion resistance of AA 7050 friction stir welds

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• 作者：Pedro Atz Dick ^{pedro.dick@gmail.com} ; Gerhard H. Knö ; rnschild ^{gerhard.hans@ufrgs.br} ; Luí ; s F.P. Dick ; ^{lfdick@ufrgs.br}
• 关键词：A. aluminium ; B. SVET ; B. polarization ; C. welding ; C. anodic films ; C. pitting corrosion
• 刊名：Corrosion Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：114
• 期：Complete
• 页码：28-36
• 全文大小：2883 K
• 卷排序：114

文摘

Sulphuric Anodizing films of AA7050 friction stir welds are 25% thinner on the nugget zone. Semicoherent MgZn2 precipitates locally pin the formation of anodic oxide film. Coarse Al7Cu2Fe precipitates anodize irregularly and produces locally thicker films. Localized corrosion occurs preferentially on the nugget zone and is related to the thinner oxide film and irregular anodizing on stirring voids.