| 镁合金表面新颖多层的耐腐蚀Mg-Al金属间化合物涂层(英文) |
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| 引用本文： | 何美凤,胡文彬,赵素,刘磊,仵亚婷.镁合金表面新颖多层的耐腐蚀Mg-Al金属间化合物涂层(英文)[J].中国有色金属学会会刊,2012(Z1):74-78. |
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| 作者姓名： | 何美凤 胡文彬 赵素 刘磊 仵亚婷 |
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| 作者单位： | 上海理工大学材料科学与工程实验室;上海交通大学复合材料国家重点实验室;上海电机学院机械工程学院 |
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| 基金项目： | Project (11R21414700) supported by Shanghai Postdoctoral Sustentation Fund, China;Project (20110490715) supported by the National Science Foundation for Post-doctoral Scientists of China;Projects (50974088, 51004070) supported by the National Natural Science Foundation of China;Project (10QA1403400) supported by Shanghai Rising-Star Program;Project (10540500900) supported by the Shanghai Municipal Education Commission |
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| 摘 要： | 通过AlCl3-NaCl熔盐扩散表面改性,在镁合金表面制备多层的Mg-Al金属间化合物层。熔盐扩散的处理温度为400 °C,此温度低于纯铝粉扩散的处理温度。熔盐扩散处理后,在镁合金表面形成 Al12Mg17、Al0.58Mg0.42和Al3Mg2多相层的金属间化合物涂层。通过电化学阻抗实验将表面改性和未经表面改性的镁合金的耐蚀性进行比较,发现镁合金表面经过熔盐扩散处理的极化电阻远大于未经表面改性镁合金的。这是因为在镁合金表面形成均匀的多相金属间化合物层。
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| 关 键 词： | Mg-Al金属间化合物涂层 多相层 扩散 腐蚀 镁合金 熔盐处理 |
Novel multilayer Mg-Al intermetallic coating for corrosion protection of magnesium alloy by molten salts treatment |
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| HE Mei-feng,HU Wen-bin,ZHAO Su,LIU Lei,WU Ya-ting.Novel multilayer Mg-Al intermetallic coating for corrosion protection of magnesium alloy by molten salts treatment[J].Transactions of Nonferrous Metals Society of China,2012(Z1):74-78. |
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| Authors: | HE Mei-feng HU Wen-bin ZHAO Su LIU Lei WU Ya-ting |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China; 3. School of Mechanical Engineering, Shanghai Dianji University, Shanghai 200240, China |
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| Abstract: | A novel multilayer Mg-Al intermetallic coating on the magnesium alloy was obtained by AlCl3-NaCl molten salt bath treatment. The molten salt was treated at 400 °C, which is lower than the treatment temperature of solid diffusion Al powder. The thick Al12Mg17, Al0.58Mg0.42 and Al3Mg2 multilayer Mg-Al intermetallic coating forms on the magnesium alloy. The corrosion resistance of AZ91D alloy with and without coating by multilayer of Mg-Al intermetallic compound was evaluated by electrochemical impedance spectroscopy measurements in 3.5% (mass fraction) NaCl solution. The polarization resistance value of the multilayer coating on the magnesium alloy by molten salt bath treatment is greater than that of the uncoated one, which is attributed to the homogenously distributed intermetallic phases. |
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| Keywords: | Mg-Al intermetallic coating multilayer diffusion corrosion magnesium alloy molten salt treatment |
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