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| 微弧氧化处理对AZ91D镁合金腐蚀行为的影响 | |
| 引用本文： | 王燕华,王佳,张际标.微弧氧化处理对AZ91D镁合金腐蚀行为的影响[J].中国腐蚀与防护学报,2006,26(4):216-220. |
| 作者姓名： | 王燕华 王佳 张际标 |
| 作者单位： | 1. 中国海洋大学,海洋化学理论与工程技术教育部重点实验室,青岛,266003 2. 中国海洋大学,海洋化学理论与工程技术教育部重点实验室,青岛,266003;金属腐蚀与防护国家重点实验室,沈阳,110016 3. 广东海洋大学,湛江,524088 |
| 摘 要： | 采用碱性硅酸盐溶液,在AZ91D镁合金试样表面制得微弧氧化膜,并利用电化学阻抗方法对镁合金及微弧氧化处理试样在3.5%NaCl溶液中的腐蚀行为进行比较研究.结果表明,镁合金经微弧氧化处理后,腐蚀电位和膜层阻抗均有一定程度的提高.但在浸泡过程中,微弧氧化处理试样的电化学参数呈现出不同的变化规律,初期波动较大,后期则逐渐降低,趋向稳定. |
| 关 键 词： | 微弧氧化 镁合金 腐蚀 电化学阻抗 |
| 文章编号： | 1005-4537（2006）04-0216-05 |
| 收稿时间： | 2005-11-20 |
| 修稿时间： | 2005-11-20 |
INFLUENCE OF MICRO- ARC OXIDATION TREATMENT ON THE CORROSION BEHAVIOR OF AZ91D MAGNESIUM ALLOY |
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| WANG Yanhua,WANG Jia,ZHANG Jibiao.INFLUENCE OF MICRO- ARC OXIDATION TREATMENT ON THE CORROSION BEHAVIOR OF AZ91D MAGNESIUM ALLOY[J].Journal of Chinese Society For Corrosion and Protection,2006,26(4):216-220. | |
| Authors: | WANG Yanhua WANG Jia ZHANG Jibiao |
| Affiliation: | 1. Key Laboratory of Maline Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266003; 2. State Key Laboratory for Corrosion and Protection, Shenyang 110016;3. Guangdong Ocean University, Zhanjiang 524088 |
| Abstract: | To investigate the influence of micro-arc oxidation(MAO) treatment,a layer of ceramic coating was prepared on AZ91D magnesium alloy by using MAO technique in alkali-silicate solution.The corrosion resistance of MAO treated and untreated AZ91D magnesium alloy was studied in 3.5mass% NaCl solution by means of the electrochemical impedance spectroscopy(EIS) method.During the immersion process,both specimens exhibited two kinds of impedance diagrams,two capacitive loops at the initial stage and one capacitive with one inductive loop at the later stage.Compared with the untreated magnesium alloy,the MAO treated specimen exhibited positive corrosion potential and increased resistance.Both the corrosion potential and the resistance of the MAO treated specimen fluctuated at the initial stage of immersion,afterwards decreased.A two-stage deterioration mechanism,the MAO coating deterioration and the Mg alloy localized corrosion,was proposed to describe the corrosion process of the MAO treated Mg alloy. |
| Keywords: | micro - arc oxidation Mg - alloy corrosion EIS |
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