| Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source | |
| L. R. Chang; F. H. Cao; J. S. Cai; W. J. Liu; Z. Zhang; J. Q. Zhang | |
| 2011 | |
| 发表期刊 | Transactions of Nonferrous Metals Society of China
 |
| ISSN | 1003-6326 |
| 卷号 | 21期号:2页码:307-316 |
| 摘要 | Micro-arc oxidation (MAO) process was carried out on AZ91D alloy in alkaline borate solution using an alternative square-wave power source with different parameters. The effects of voltage, frequency and duty cycle on the coatings were investigated by orthogonal experiment. It is found that the thickness of coatings increases with the increase of voltage and duty cycle, but decreases with the increase of frequency. The structure and morphology of the coatings also depend on voltage, frequency and duty cycle. The coatings become more porous and crack with increasing voltage and duty cycle. The coating is thin and transparent when the voltage is lower than 120 V. The corrosion resistances of different coatings were evaluated by polarization curves and electrochemical impedance spectroscopy (EIS) in 3.5% NaCl (mass fraction) solution. When the optimized values of voltage, frequency and duty cycle are 140 V, 2 000 Hz and 0.4, respectively, the anodic coating shows the best corrosion resistance. |
| 部门归属 | [chang lin-rong; cao fa-he; cai jing-shun; liu wen-juan; zhang zhao; zhang jian-qing] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang jian-qing] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;cao, fh (reprint author), zhejiang univ, dept chem, hangzhou 310027, peoples r china;nelson_cao@zju.edu.cn |
| 关键词 | Az91d Magnesium Alloy Micro-arc Oxidation (Mao) Alternative Square-wave Duty Cycle Applied Voltage Frequency Plasma Electrolytic Oxidation Mg-al Alloys Corrosion Behavior Anodic Films Coatings Additives Performance Resistance Phase |
| URL | 查看原文 |
| WOS记录号 | WOS:000288451200013 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/30248 |
| 专题 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. R. Chang,F. H. Cao,J. S. Cai,et al. Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source[J]. Transactions of Nonferrous Metals Society of China,2011,21(2):307-316. |
| APA | L. R. Chang,F. H. Cao,J. S. Cai,W. J. Liu,Z. Zhang,&J. Q. Zhang.(2011).Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source.Transactions of Nonferrous Metals Society of China,21(2),307-316. |
| MLA | L. R. Chang,et al."Influence of electric parameters on MAO of AZ91D magnesium alloy using alternative square-wave power source".Transactions of Nonferrous Metals Society of China 21.2(2011):307-316. |
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