Electrochemical behavior Al2O3/Al coated surgical AZ91 magnesium alloy in simulated body fluids

被引：61

作者：

Xin, Yunchang ^{[1
,2
]}

Liu, Chenglong ^{[1
]}

Zhang, Wenjun ^{[1
]}

Jiang, Jiang ^{[1
]}

Tang, Guoyi ^{[2
]}

Tian, Xiubo ^{[3
]}

Chua, Paul K. ^{[1
]}

机构：

[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

[2] Tsing Hua Univ, Shenzhen Grad Sch, Adv Mat Inst, Shenzhen 518055, Peoples R China

[3] Harbin Inst Technol, Sch Mat Sci & Engn, State Key Lab Welding Product Technol, Harbin 150001, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 05期

关键词：

D O I：

10.1149/1.2844433

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Magnesium alloys are potential materials for use in biodegradable hard-tissue implants, but the fast degradation rate in a biological environment limits their applications. In order to improve the corrosion resistance, a dense, adhesive, and biocompatible Al2O3/Al bilayered coating is fabricated on AZ91 magnesium alloy by means of filtered cathodic arc deposition. The electrochemical behavior is systematically studied in simulated body fluids using a potentiodynamic polarization test, open-circuit potential evolution, as well as electrochemical impedance spectroscopy. Our results indicate that the corrosion resistance of the coated alloy is significantly enhanced. The deterioration mechanism and corrosion process of the coating during immersion are discussed. (c) 2008 The Electrochemical Society.

引用

页码：C178 / C182

页数：5

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