Plasma electrolytic oxidation of AZ91D magnesium alloy with different additives and its corrosion behavior
文献类型：期刊论文
| 作者 | F. H. Cao ; J. L. Cao ; Z. Zhang ; J. Q. Zhang ; C. N. Cao |
| 刊名 | Materials and Corrosion-Werkstoffe Und Korrosion
 |
| 出版日期 | 2007 |
| 卷号 | 58期号:9页码:676-683 |
| 关键词 | ac-impedance measurements oxide-films aluminum coatings |
| ISSN号 | 0947-5117 |
| 中文摘要 | Plasma electrolytic oxidation (PEO) of Mg-based AZ91D alloys was investigated using 50 Hz AC anodizing technique in an alkaline borate solution, which contained a new kind of organic additive and without F, P, and Cr. The anodizing technological parameters have been optimized and a kind of ivory-white smooth anodic film with high corrosion resistance was obtained. It was found that the formation of the anodic films was always coupled with sparking and oxygen evolution, whose intensity changed with the additive and anodizing voltage. All EIS plots have two capacitive loops and one low frequency inductive component. Two capacitive arcs present the barrier and porous layer of the PEO film and the inductive component in the low frequency domain is a complex behavior due to the porous structure connected to the electrolyte.EIS plots and fitting results show that a self-sealing process of the PEO firm with different additives takes place in the beginning of immersion time, then corrosion attack becomes a preponderant process to promote the degradation of the film. Tafel results show that PEO treatment decreases the corrosion current density by four, even five orders of magnitude, while additives content does not affect strongly the electrochemical corrosion behavior. Salt spray test shows that the PEO film formed with NaAlO2 and Na2SiO3 presents good corrosion resistance, over 600 h without any sealing treatment. The difference of corrosion resistance arose by additives examined by electrochemical techniques and salt spray test does not show strict corresponding relationship. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33431]  |
| 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 | F. H. Cao,J. L. Cao,Z. Zhang,et al. Plasma electrolytic oxidation of AZ91D magnesium alloy with different additives and its corrosion behavior[J]. Materials and Corrosion-Werkstoffe Und Korrosion,2007,58(9):676-683. |
| APA | F. H. Cao,J. L. Cao,Z. Zhang,J. Q. Zhang,&C. N. Cao.(2007).Plasma electrolytic oxidation of AZ91D magnesium alloy with different additives and its corrosion behavior.Materials and Corrosion-Werkstoffe Und Korrosion,58(9),676-683. |
| MLA | F. H. Cao,et al."Plasma electrolytic oxidation of AZ91D magnesium alloy with different additives and its corrosion behavior".Materials and Corrosion-Werkstoffe Und Korrosion 58.9(2007):676-683. |
入库方式： OAI收割
来源：金属研究所
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