Achieving robust long-term corrosion resistance and high strength of wrought Mg-Al-Y alloy via introducing continuous precipitates

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-10-11 DOI:10.1016/j.corsci.2025.113407

Haiyang Wang , Yao Yang , Jie Wang , Yuyang Chen , Xingpeng Liao , Yue Yang , Zhansheng Chen , Tao Ying , Xiaoqin Zeng

引用次数: 0

Abstract

The corrosion resistance and strength of the extruded Mg-9Al-0.2Y (wt%) alloy were significantly improved by simple rolling and aging treatment. Compared with the as-extruded alloy, the rolled alloy containing high-density dislocations also exhibits superior corrosion resistance due to the formation of a more compact passive film. Owing to the introduction of dense Mg₁₇Al₁₂ continuous precipitates (CPs), the aged alloy exhibits excellent long-term corrosion resistance and high strength, with a corrosion rate (P_w) of 0.18 mm/y and a yield strength of 284 MPa. The stronger barrier effect of dense CPs on localized corrosion propagation and the formation of a stable Mg-Al LDH passive film are the primary reasons for the superior long-term corrosion resistance of the aged alloy.

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通过引入连续析出物，实现锻造Mg-Al-Y合金的长期耐腐蚀性和高强度

挤压后的Mg-9Al-0.2Y （wt%）合金经简单轧制和时效处理后，其耐腐蚀性能和强度均有显著提高。与挤压态合金相比，含有高密度位错的轧制合金由于形成更致密的钝化膜而具有更好的耐腐蚀性能。时效合金由于引入了致密的Mg17Al12连续相（CPs），表现出良好的长期耐蚀性和高强度，腐蚀速率（Pw）为0.18 mm/y，屈服强度为284 MPa。致密CPs对局部腐蚀扩展的阻挡作用较强，形成稳定的Mg-Al LDH钝化膜，是时效合金长期耐蚀性能优异的主要原因。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.