Corrosion behavior of fine-grained AZ31B magnesium alloy

被引：115
|
作者：
Liao, Jinsun [1 ]
Hotta, Makoto [1 ]
Yamamoto, Naotsugu [1 ]
机构：
[1] Kurimoto Ltd, R&D Dept, Osaka 5590021, Japan
来源：
CORROSION SCIENCE | 2012年 / 61卷
关键词：
Magnesium; Polarization; SEM; Localized corrosion; Passivity; IMPACT TOUGHNESS; MG ALLOY; MICROSTRUCTURE; RESISTANCE; EXTRUSION;
D O I：
10.1016/j.corsci.2012.04.039
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of two fine-grained AZ31B alloys was investigated using immersion test, cyclic neutral-salt spray test and electrochemical analysis, and compared to that of commonly hot-extruded AZ31B and AM60 alloys with coarser grains. The fine-grained AZ31B alloys display a higher corrosion resistance than commonly hot-extruded AZ31B, but their corrosion resistance is inferior to that of AM60 alloy. The corrosion resistance of AZ31B alloy tends to increase as grain size is reduced, probably due to the enhanced passivity of surface oxide film, while the effect of grain size is not as significant as that of chemical compositions. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：208 / 214
页数：7
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