Influence of β-Mg17Al12 and Al-Mn intermetallic compounds on the corrosion behaviour of cast and solution treated Mg-Al-Zn-Mn alloys

被引：16

作者：

Yang, Yang ^{[1
]}

Deng, Yangchao ^{[1
]}

Zhang, Ruifeng ^{[1
]}

Su, Yuqing ^{[1
]}

Liu, Siyue ^{[1
]}

Gourlay, Christopher M. ^{[2
]}

Zeng, Guang ^{[1
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Imperial Coll London, Dept Mat, London SW7 2AZ, England

来源：

CORROSION SCIENCE | 2023年 / 222卷

基金：

英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

Al-Mn intermetallics; Three-dimensional (3D) morphology; Corrosion; beta-Mg(17)Al(12)eutectic; SCANNING KELVIN PROBE; MAGNESIUM ALLOY; FORCE MICROSCOPY; HEAT-TREATMENT; MICROSTRUCTURE; PHASE; AZ91; PARTICLES; MANGANESE; GROWTH;

D O I：

10.1016/j.corsci.2023.111363

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study aims to investigate the correlation between the microstructure and corrosion behaviour of AZ series alloys, using analytical scanning electron microscopy, X-ray computed tomography, hydrogen evolution test, weight loss method, electrochemical measurement, and observation of corroded morphology. The results indicate that a 3D interconnected eutectic network is effective in preventing localized corrosion in chloride solution. It is also revealed that solution treated Al-Mn intermetallics lead to filiform corrosion, rather than pitting corrosion, as seen tau-AlMn and Al8Mn5 particles. This is due to the potential difference reduction between the complete Al11Mn4 shell and the alpha-Mg matrix.

引用

页数：14

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