Fabrication of chitosan/magnesium phosphate composite coating and the in vitro degradation properties of coated magnesium alloy

被引：86

作者：

Bai, Kuifeng ^{[1
]}

Zhang, Yi ^{[2
]}

Fu, Zhenya ^{[1
]}

Zhang, Caili ^{[3
]}

Cui, Xinzhan ^{[1
]}

Meng, Erchao ^{[1
]}

Guan, Shaokang ^{[1
]}

Hu, Junhua ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Mat Sci & Engn, Ctr Mat Res, Zhengzhou 450002, Peoples R China

[2] Beihang Univ, Sch Mech Engn & Automat, Beijing 100083, Peoples R China

[3] Zhongyuan Inst Technol, Dept Civil & Architecture Engn, Zhengzhou 450007, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 73卷

关键词：

Biomaterials; Composite coating; Mg alloy; Corrosion; CORROSION;

D O I：

10.1016/j.matlet.2011.12.102

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

A composite coating was fabricated on home-developed Mg-Zn-Ca alloy to improve its biocorrosion resistance in simulated body fluid (SBF, Kokubo solution). The coating was prepared by micro arc oxidation (MAO) of the alloy, followed by dip-coating in chitosan solution. The coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The electrochemical performance of the MAO, chitosan and chitosan/MAO coated alloys was evaluated by anodic polarization measurements in SBF. After being coated by composite coating, anticorrosion performance was significantly enhanced, while single MAO or chitosan coating only improved anticorrosion properties within a limited range. The barrier effect and interface condition of composite coating were analyzed and related with the improvement in electrochemical performance. The present result indicates that fabrication of composite coatings is a significant strategy to slow down the degradation of Mg alloys, thus enhancing the potential of using Mg alloys as bio-implants. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：59 / 61

页数：3

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