Influence of a MAO plus PLGA coating on biocorrosion and stress corrosion cracking behavior of a magnesium alloy in a physiological environment

被引：102

作者：

Chen, Lianxi ^{[1
]}

Sheng, Yinying ^{[1
]}

Zhou, Hanyu ^{[1
]}

Li, Zhibin ^{[1
]}

Wang, Xiaojian ^{[1
,2
]}

Li, Wei ^{[2
]}

机构：

[1] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China

[2] Natl Joint Engn Res Ctr High Performance Met Wear, Guangzhou 510632, Guangdong, Peoples R China

来源：

CORROSION SCIENCE | 2019年 / 148卷

关键词：

Magnesium alloy; Degradation; Mechanical integrity; Stress corrosion cracking; Open circuit potential; FRACTURE; MECHANISM; FLUID;

D O I：

10.1016/j.corsci.2018.12.005

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Micro-arc oxidation (MAO) sealed with poly(lactic-co-glycolic acid) (PLGA) composite coating was prepared on novel Mg-4Zn-0.6Zr-0.4Sr magnesium alloy. Immersion tests and slow strain rate tensile (SSRT) tests combined with in-situ electrochemical tests indicated that the MAO + PLGA coating significantly improved the corrosion and the stress corrosion cracking (SCC) resistance. The findings of this work indicate that a protective coating that is able to withstand deformation or stress is essential for maintaining the mechanical stability of a biodegradable Mg alloy in a stress corrosion environment. The widely used MAO coating only provides a limited improvement for the SCC resistance of biomedical ZK40-0.4Sr alloy.

引用

收藏

页码：134 / 143

页数：10

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