The influence of yttrium (Y) on the corrosion of Mg-Y binary alloys

被引：326

作者：

Liu, Ming ^{[1
,2
]}

Schmutz, Patrik ^{[2
]}

Uggowitzer, Peter J. ^{[3
]}

Song, Guangling ^{[1
]}

Atrens, Andrej ^{[1
,2
]}

机构：

[1] Univ Queensland, Div Mat, Brisbane, Qld 4072, Australia

[2] EMPA, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[3] ETH, Dept Mat, CH-8093 Zurich, Switzerland

来源：

CORROSION SCIENCE | 2010年 / 52卷 / 11期

基金：

澳大利亚研究理事会;

关键词：

Magnesium; EIS; MECHANICAL-PROPERTIES; MAGNESIUM CORROSION; ANODIC-DISSOLUTION; BEHAVIOR; MICROSTRUCTURE; PERFORMANCE; RESISTANCE; CHLORIDE; ALUMINUM; AZ91;

D O I：

10.1016/j.corsci.2010.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Corrosion of Mg-Y alloys was studied using electrochemical evaluations, immersion tests and direct observations. There were two important effects. in 0.1 M NaCl, the corrosion rate increased with increasing Y content due to increasing amounts of the Y-containing intermetallic. In 0.1 M Na2SO4, the corrosion rate decreased with increasing Y content above 3%, attributed to a more protective surface film, despite the intermetallic. The corrosion rate evaluated by electrochemical impedance spectroscopy was somewhat smaller than that evaluated from H evolution as expected from the Mg corrosion mechanism. A mechanism is proposed for filiform corrosion. Direct in situ corrosion observations revealed that a predominant feature was hydrogen evolution from particular parts of the alloy surface. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3687 / 3701

页数：15

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