Polarization Behavior of Magnesium Alloy AZ91D with Micro-Arc Oxidation Coating in NaCl Solution
文献类型：期刊论文
| 作者 | L. R. Chang ; F. H. Cao ; J. S. Cai ; W. J. Liu ; J. J. Zheng ; J. Q. Zhang ; C. N. Cao |
| 刊名 | Acta Physico-Chimica Sinica
 |
| 出版日期 | 2012 |
| 卷号 | 28期号:1页码:127-136 |
| 关键词 | AZ91D Micro-arc oxidaton coating Polarization curve Fourier transform infrared spectroscopy microscopic mapping Electrochemical impedance spectroscopy plasma electrolytic oxidation corrosion-resistance electrochemical-behavior peo coatings aqueous-solution anodization silicate films microstructure performance |
| ISSN号 | 1000-6818 |
| 中文摘要 | The polarization curves of magnesium alloy AZ91D with a micro-arc oxidation (MAO) coating showed several typical patterns caused by differences in the composition and structure of the coating. The pattern of the polarization curve of magnesium alloy AZ91D with a MAO coating depends on the primary composition and structure of the MAO coating and many experimental factors, such as the concentration of chloride ions, pH of the electrolyte, degree of cathodic polarization, and the exposed area of the specimen. These factors change the pattern of polarization curve of magnesium alloy AZ91D with MAO coating by affecting the main composition and structure of the MAO coating because of its instability in aqueous solution. Compositional and structural changes in the MAO coating on magnesium alloy AZ91D were investigated by Fourier transform infrared microscopic mapping and the corresponding optical photographs, respectively. A model was proposed to describe the transformation of the MAO coating in aqueous NaCl solution. For magnesium alloy AZ91D with a MAO coating immersed in NaCl solution, the rate determining steps of the anodic and cathodic reactions are the mass diffusion and charge transfer steps, respectively. As a result, the corrosion current density fitted from the polarization curve is not an accurate corrosion rate. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/59894]  |
| 专题 | 金属研究所_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. Polarization Behavior of Magnesium Alloy AZ91D with Micro-Arc Oxidation Coating in NaCl Solution[J]. Acta Physico-Chimica Sinica,2012,28(1):127-136. |
| APA | L. R. Chang.,F. H. Cao.,J. S. Cai.,W. J. Liu.,J. J. Zheng.,...&C. N. Cao.(2012).Polarization Behavior of Magnesium Alloy AZ91D with Micro-Arc Oxidation Coating in NaCl Solution.Acta Physico-Chimica Sinica,28(1),127-136. |
| MLA | L. R. Chang,et al."Polarization Behavior of Magnesium Alloy AZ91D with Micro-Arc Oxidation Coating in NaCl Solution".Acta Physico-Chimica Sinica 28.1(2012):127-136. |
入库方式： OAI收割
来源：金属研究所
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