热门
Corrosion behaviour of AZ21, AZ501 and AZ91 in sodium chloride
文献类型：期刊论文
| 作者 | G. L. Song ; A. Atrens ; X. L. Wu ; B. Zhang |
| 刊名 | Corrosion Science
 |
| 出版日期 | 1998 |
| 卷号 | 40期号:10页码:1769-1791 |
| ISSN号 | 0010-938X |
| 关键词 | magnesium alloys corrosion negative difference effect microstructure magnesium alloys electrode |
| 中文摘要 | The corrosion behaviour of AZ21, AZ501 and AZ91 was studied in 1 N NaCl at pH 11 by measuring electrochemical polarization curves, electrochemical AC impedance spectroscopy (EIS) and simultaneously measuring the hydrogen evolution rate and the: magnesium dissolution rate. The corrosion rates increased in the following order: AZ501 < AZ21 < AZ91. The: corrosion behaviour was related to alloy microstructure as revealed by optical and electron microscopy. The beta phase was very stable in the test solution and was an effective cathode. The beta phase served two roles, as a barrier and as a galvanic cathode. If the beta phase is present in the alpha matrix as intergranular precipitates with a small volume fraction, then the beta phase mainly serves as a galvanic cathode, and accelerates the corrosion of the alpha matrix. If the beta Fraction is high, then the beta phase may mainly act as an anodic barrier to inhibit the overall corrosion of the alloy. The composition and compositional distribution in the alpha phase is also crucial to the overall corrosion performance of dual phase alloys. Increasing the aluminum concentration in the alpha phase increases the anodic dissolution rate and also increases the cathodic hydrogen evolution rate. Increasing the zinc concentration in the alpha phase may have the opposite effect. (C) 1998 Elsevier Science Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37773]  |
| 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 | G. L. Song,A. Atrens,X. L. Wu,et al. Corrosion behaviour of AZ21, AZ501 and AZ91 in sodium chloride[J]. Corrosion Science,1998,40(10):1769-1791. |
| APA | G. L. Song,A. Atrens,X. L. Wu,&B. Zhang.(1998).Corrosion behaviour of AZ21, AZ501 and AZ91 in sodium chloride.Corrosion Science,40(10),1769-1791. |
| MLA | G. L. Song,et al."Corrosion behaviour of AZ21, AZ501 and AZ91 in sodium chloride".Corrosion Science 40.10(1998):1769-1791. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。