| AZ91 镁合金表面Ce-Mn 转化膜组织及性能表征 |
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| 引用本文： | 姚泽江,盘艳红,杜军,罗鹏,宇文惠惠. AZ91 镁合金表面Ce-Mn 转化膜组织及性能表征[J]. 表面技术, 2012, 0(6): 47-50 |
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| 作者姓名： | 姚泽江 盘艳红 杜军 罗鹏 宇文惠惠 |
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| 作者单位： | 华南理工大学材料科学与工程学院, 广州510640,华南理工大学材料科学与工程学院, 广州510640,华南理工大学材料科学与工程学院, 广州510640,华南理工大学材料科学与工程学院, 广州510640,华南理工大学材料科学与工程学院, 广州510640 |
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| 基金项目： | 华南理工大学学生研究计划(SRP)项目(2011-126) |
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| 摘 要： | 室温下,在AZ91 镁合金表面制备Ce-Mn 复合转化膜,通过单因素实验研究了Ce(NO3 )3 浓度和KMnO4 浓度对转化膜耐腐蚀性能的影响,确定了较佳的浓度配比。分析了转化膜的结构及组成,通过交流阻抗谱,研究了Ce-Mn 对基体镁合金的防护机制。结果表明:Ce-Mn 转化膜为非晶态物相结构,膜层主要由铈、锰和少量镁的氧化物或氢氧化物组成,Ce-Mn 转化膜可对镁合金起到较好的防护作用。
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| 关 键 词： | 镁合金 Ce-Mn 转化膜 组织成分 耐蚀性 |
| 收稿时间： | 2012-06-27 |
| 修稿时间： | 2012-12-20 |
Characterization of Microstructure and Anti-corrosion Resistance of Ce-Mn Chemical Conversion Coating on AZ91 Magnesium Alloy |
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| YAO Ze-jiang,PAN Yan-hong,DU Jun,LUO Peng and YUWEN Hui-hui. Characterization of Microstructure and Anti-corrosion Resistance of Ce-Mn Chemical Conversion Coating on AZ91 Magnesium Alloy[J]. Surface Technology, 2012, 0(6): 47-50 |
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| Authors: | YAO Ze-jiang PAN Yan-hong DU Jun LUO Peng YUWEN Hui-hui |
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| Affiliation: | School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China,School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China,School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China,School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China and School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Ce-Mn chemical conversion coating was prepared on AZ91 magnesium alloy at room temperature. The effects of Ce(NO3 )3 and KMnO4 concentrations on the corrosion resistance of conversion coating were investigated by the single factor experiment and the optimum concentrations were obtained. The conversion coating structures and compositions were studied. The anti-corrosion mechanism of Ce-Mn coating on magnesium alloy was investigated through electrochemical impedance spectroscopy (EIS). The results show that Ce-Mn conversion coating is mainly composed of oxide or hydroxide of Ce, Mn and little Mg with amorphous structure. The Ce-Mn conversion coating can play better anti-corrosion to magnesium alloy. |
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| Keywords: | magnesium alloy Ce-Mn conversion coating composition corrosion resistance |
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