| AZ91D镁合金微弧氧化膜耐蚀性的试验研究 |
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| 引用本文： | 缪姚军,沈承金,刘建军.AZ91D镁合金微弧氧化膜耐蚀性的试验研究[J].轻合金加工技术,2006,34(10):43-46,56. |
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| 作者姓名： | 缪姚军 沈承金 刘建军 |
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| 作者单位： | 1. 中国矿业大学,材料学院,江苏,徐州,221008
2. 上海重型机器厂有限公司,上海,200245 |
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| 基金项目： | 中国矿业大学校科研和教改项目 |
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| 摘 要： | 研究了AZ91D镁合金微弧氧化膜在复合铝酸盐溶液中的耐蚀性。利用X射线衍射（XRD）和扫描电子显微镜（SEM）分析了AZ91D镁合金微弧氧化膜的物相和表面形貌；利用IM6e型电化学工作站测量了氧化膜的电化学阻抗和稳态电流／电位极化曲线；利用CMB-1501B型便携式瞬时腐蚀速度测量仪测量了氧化膜的腐蚀电流密度Icorr和年腐蚀深度MMA。试验结果表明，微弧氧化的镁合金耐蚀性提高了2～3个数量级，镁合金微弧氧化膜主要由MgO、MgAl2O4、Al12Mg17组成。
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| 关 键 词： | 镁合金 微弧氧化 电化学 耐蚀性 |
| 文章编号： | 1007-7235（2006）10-0043-04 |
| 收稿时间： | 2006-06-10 |
| 修稿时间： | 2006-06-10 |
Corrosion resistance of ceramic layer on AZ91D magnesiumalloy formed by micro-arc oxidation |
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| MIAO Yao-jun,SHEN Cheng-jin,LIU Jian-jun.Corrosion resistance of ceramic layer on AZ91D magnesiumalloy formed by micro-arc oxidation[J].Light Alloy Fabrication Technology,2006,34(10):43-46,56. |
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| Authors: | MIAO Yao-jun SHEN Cheng-jin LIU Jian-jun |
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| Affiliation: | 1.School of Materials Science and Engineering, CUMT, Xuzhou 221008, China; 2. Shanghai Heavy Plant Co., Ltd., Shanghai 200245, China |
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| Abstract: | In this paper,corrosion resistance of ceramic layer formed by micro-arc oxidation of AZ91D magnesium alloy on aluminate solutions were investigated.X-ray diffraction apparatus and the scanning electron microscope were used to observe the phase composition and surface morphology,electrochemical workstation IM6e was used to measure the electrochemical impedance and steady state I-E polarization curves of ceramic layer formed by micro-arc oxidation of AZ91D magnesium alloy.CMB-1501B corrosion rate measurement was used to measure corrosion current rate and corrosion depth.The result shows that: the corrosion resistance of magnesium alloy micro arc oxidation coating was improved two-three orders,and the ceramic layer was mainly composed of MgO,MgAl_2O_4,Al_(12)Mg_(17). |
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| Keywords: | magnesium alloy micro-arc oxidation electrochemical corrosion resistance |
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