4.4 Article

Effect of microstructural features on the corrosion behavior of severely deformed Al-Mg-Si alloy

期刊

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/maco.202012056

关键词

Al-Mg-Si alloy; intermetallic particles; pitting corrosion; ultrafine grained microstructure

向作者/读者索取更多资源

The study demonstrates that the corrosion resistance of the Al-Mg-Si alloy is primarily influenced by the intermetallic particles rather than grain boundaries. Grain refinement plays a role in mitigating corrosion attack.
The aim of this study was to determine the influence of severe plastic deformation processing and the changes in microstructure resulting therefrom on the corrosion resistance of an Al-Mg-Si alloy. The alloy was processed using incremental equal channel angular pressing, which caused a reduction in grain size from 15 to 0.9 mu m. The grain refinement was accompanied by an increase in the number of grain boundaries and dislocations, and by changes in grain orientation. However, there was no change in the size and number of intermetallic particles, which presumably resulted in a constant number of galvanic couplings. Electrochemical experiments revealed only slight differences between the samples before and after processing. Higher potential transients/oscillations upon immersion and increased corrosion currents in the vicinity of corrosion potential point to slightly higher reactivity of the most refined material. This indicates that intermetallic particles are the most crucial microstructural elements in terms of corrosion resistance. Their impact exceeds that of grain boundaries, in particular, at the stage of corrosion initiation. The development of corrosion attack is controlled more by the microstructure of the matrix as the grain refinement resulted in a less pronounced corrosion attack in comparison with the coarse-grained sample.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据