Corrosion behaviors of Zn/Al-Mn alloy composite coatings deposited on magnesium alloy AZ31B (Mg-Al-Zn)
文献类型：期刊论文
| 作者 | J. F. Zhang ; W. Zhang ; C. W. Yan ; K. Q. Du ; F. H. Wang |
| 刊名 | Electrochimica Acta
 |
| 出版日期 | 2009 |
| 卷号 | 55期号:2页码:560-571 |
| 关键词 | Magnesium alloy Al-Mn alloy Composite coatings Corrosion resistance EIS plasma electrolytic oxidation molten-salts impedance spectroscopy aluminum films az91d steel eis electrodeposition resistance |
| ISSN号 | 0013-4686 |
| 中文摘要 | After being pre-plated a zinc layer, an amorphous Al-Mn alloy coating was applied onto the surface of AZ31B magnesium alloy with a bath of molten salts. Then the corrosion performance of the coated magnesium alloy was examined in 3.5% NaCl solution by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed that the single Zn layer was active in the test solution with a high corrosion rate while the Al-Mn alloy coating could effectively protect AZ31B magnesium alloy from corrosion in the solution. The high corrosion resistance of Al-Mn alloy coating was ascribed to an intact and stable passive film formed on the coating. The performances of the passive film on Al-Mn alloy were further investigated by Mott-Schottky curve and X-ray photoelectron spectroscopy (XPS) analysis. It was confirmed that the passive film exhibited n-type semiconducting behavior in 3.5% NaCl solution with a carrier density two orders of magnitude less than that formed on pure aluminum electrode. The XPS analysis indicated that the passive film was mainly composed of AlO(OH) after immersion for long time and the content of Mn was negligible in the outer part of the passive film. Based on the EIS measurement, electronic structure and composition analysis of the passive film, a double-layer structure, with a compact inner oxide and a porous outer layer, of the film was proposed for understanding the corrosion process of passive film, with which the experimental observations might be satisfactorily interpreted. (C) 2009 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32551]  |
| 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 | J. F. Zhang,W. Zhang,C. W. Yan,et al. Corrosion behaviors of Zn/Al-Mn alloy composite coatings deposited on magnesium alloy AZ31B (Mg-Al-Zn)[J]. Electrochimica Acta,2009,55(2):560-571. |
| APA | J. F. Zhang,W. Zhang,C. W. Yan,K. Q. Du,&F. H. Wang.(2009).Corrosion behaviors of Zn/Al-Mn alloy composite coatings deposited on magnesium alloy AZ31B (Mg-Al-Zn).Electrochimica Acta,55(2),560-571. |
| MLA | J. F. Zhang,et al."Corrosion behaviors of Zn/Al-Mn alloy composite coatings deposited on magnesium alloy AZ31B (Mg-Al-Zn)".Electrochimica Acta 55.2(2009):560-571. |
入库方式： OAI收割
来源：金属研究所
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