Retardation of surface corrosion of biodegradable magnesium-based materials by aluminum ion implantation

被引：65

作者：

Wu, Guosong ^{[1
]}

Xu, Ruizhen ^{[1
]}

Feng, Kai ^{[1
]}

Wu, Shuilin ^{[1
]}

Wu, Zhengwei ^{[1
]}

Sun, Guangyong ^{[2
]}

Zheng, Gang ^{[2
]}

Li, Guangyao ^{[2
]}

Chu, Paul K. ^{[1
]}

机构：

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

[2] Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2012年 / 258卷 / 19期

关键词：

Magnesium alloys; Biomaterials; Ion implantation; Corrosion; Surface; SIMULATED BODY-FLUIDS; IN-VITRO; BIOMEDICAL MAGNESIUM; ELECTROCHEMICAL-BEHAVIOR; DUPLEX COATINGS; ALLOY; RESISTANCE; MG; DEGRADATION; PERFORMANCE;

D O I：

10.1016/j.apsusc.2012.04.112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Aluminum ion implantation is employed to modify pure Mg as well as AZ31 and AZ91 magnesium alloys and their surface degradation behavior in simulated body fluids is studied. Polarization tests performed in conjunction with scanning electron microscopy (SEM) reveal that the surface corrosion resistance after Al ion implantation is improved appreciably. This enhancement can be attributed to the formation of a gradient surface structure with a gradual transition from an Al-rich oxide layer to Al-rich metal layer. Compared to the high Al-content magnesium alloy (AZ91), a larger reduction in the degradation rate is achieved from pure magnesium and AZ31. Our results reveal that the surface corrosion resistance of Mg alloys with no or low Al content can be improved by Al ion implantation. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：7651 / 7657

页数：7

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