Crystal-orientation-dependent corrosion behaviour of single crystals of a pure Mg and Mg-Al and Mg-Cu solid solutions

被引：144

作者：

Hagihara, Koji ^{[1
]}

Okubo, Masayoshi ^{[1
]}

Yamasaki, Michiaki ^{[2
,3
,4
]}

Nakano, Takayoshi ^{[5
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Adapt Machine Syst, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

[2] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia

[3] Kumamoto Univ, Magnesium Res Ctr, Chuo Ku, 2-39-1 Kurokami, Kumamoto 8608555, Japan

[4] Kumamoto Univ, Dept Mat Sci, Chuo Ku, 2-39-1 Kurokami, Kumamoto 8608555, Japan

[5] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

来源：

CORROSION SCIENCE | 2016年 / 109卷

基金：

日本学术振兴会;

关键词：

Magnesium; Electrochemical impedance spectroscopy (EIS); Polarization; HIGH-PURITY MG; CRYSTALLOGRAPHIC ORIENTATION; ELECTROCHEMICAL CORROSION; IN-VITRO; INTERMETALLIC COMPOUNDS; MAGNESIUM CORROSION; HYDROGEN EVOLUTION; ANODIC-DISSOLUTION; NACL SOLUTION; ALLOYS;

D O I：

10.1016/j.corsci.2016.03.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mg alloys are promising candidates for biodegradable materials. To control their dissolution rate, the orientation-dependent corrosion behaviour of pure-Mg single crystals was examined. The corrosion rates increased in the order (0001) < (11<(2)over bar>0) < (10<(1)over bar>0) < (11<(2)over bar>3) < (10<(1)over bar>2). We found the anodic reaction governs the orientation-dependent corrosion behaviour. The charge-transfer and film resistances were strongly orientation-dependent. Effects of Al or Cu-addition to the orientation-dependent corrosion behaviour were also examined as model materials. Al-addition promoted passivation in anodic polarization, while Cu-addition activated the cathodic reaction. However, neither Al nor Cu influenced the order of orientation-dependent corrosion behaviour. Such orientation-dependence may originate from the variation in surface atomic-packing density. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：68 / 85

页数：18

共 73 条

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