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5083鋁合金攪拌摩擦焊接頭微弧氧化膜電化學(xué)腐蝕行為
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國家自然科學(xué)基金項目（51071031）；北京市自然科學(xué)基金項目（2102018）


Electrochemical Corrosion Behavior of Microarc Oxidation Coatings on Friction stir weld Joints of 5083 Aluminum Alloy
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    摘要:

    利用微弧氧化技術(shù)在5083鋁合金攪拌摩擦焊 (FSW) 接頭表面制備一層均勻的微弧氧化膜。通過動電位極化和電化學(xué)阻抗譜 (EIS) 分析，評估微弧氧化前后攪拌摩擦焊接頭的腐蝕特性。結(jié)果表明，經(jīng)過微弧氧化表面處理的攪拌摩擦焊樣品腐蝕電流密度減小，電化學(xué)阻抗增加，抗腐蝕性能得到了顯著改善。未氧化處理的不同焊接組織區(qū)域腐蝕行為存在明顯的差異，而5083鋁合金母相和焊縫表面的微弧氧化膜具有相同的形貌和抗腐蝕性能。

    Abstract:

    Uniform microarc oxidation coatings on the friction stir weld (FSW) joint of 5083 aluminum alloy were prepared by microarc oxidation (MAO) technique. The corrosion resistance of the friction stir weld joint before and after microarc oxidation surface treatment was evaluated by potentiodynamic polarization test and electrochemical impedance spectroscopic analysis (EIS). The results show that by microarc oxidation surface treatment, the corrosion current density of friction stir weld samples is decreased, and its electrochemical impedance is increased, thus the corrosion resistance of coated samples being significantly improved. In addition, the corrosion behavior at Fsw microstructure zones without MAO surface treatment have rather obvious difference, but after MAO treatment, both the coated base metal and Fsw joint on 5083 aluminum alloy have similar surface morphology and corrosion resistance.

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魯 亮,薛文斌,金小越,杜建成,華 銘.5083鋁合金攪拌摩擦焊接頭微弧氧化膜電化學(xué)腐蝕行為[J].稀有金屬材料與工程,2012,41(9):1597~1601.[Lu Liang, Xue Wenbin, Jin Xiaoyue, Du Jiancheng, Hua Ming. Electrochemical Corrosion Behavior of Microarc Oxidation Coatings on Friction stir weld Joints of 5083 Aluminum Alloy[J]. Rare Metal Materials and Engineering,2012,41(9):1597~1601.]
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  • 收稿日期:2011-09-15
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