Biodegradable behaviors of AZ31 magnesium alloy in simulated body fluid

被引：338

作者：

Song, Yingwei ^{[1
]}

Shan, Dayong ^{[1
]}

Chen, Rongshi ^{[1
]}

Zhang, Fan ^{[1
]}

Han, En-Hou ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Corros & Protect, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2009年 / 29卷 / 03期

关键词：

Magnesium alloys; Biodegradable behaviors; Electrochemical test; Corrosion; IN-VIVO CORROSION;

D O I：

10.1016/j.msec.2008.08.026

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Magnesium alloys have unique advantages to act as biodegradable implants for clinical application. The biodegradable behaviors of AZ31 in simulated body fluid (SBF) for various immersion time intervals were investigated by electrochemical impedance spectroscopy (EIS) tests and scanning electron microscope (SEM) observation, and then the biodegradable mechanisms were discussed. It was found that a protective film layer was formed on the surface of AZ31 in SBF. With increasing of immersion time. the film layer became more compact. If the immersion time was more than 24 h, the film layer began to degenerate and emerge corrosion pits. in the meantime, there was hydroxyapatite particles deposited on the film layer. The hydroxyapatite is the essential component of human bone, which indicates the perfect biocompatibility of AZ31 magnesium alloy. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1039 / 1045

页数：7

共 20 条

[1]

[Anonymous], 2002, INTRO ELECTROCHEMICA

[2]

Cao CN., 2004, PRINCIPLE CORROSION

[3]

Characterization and corrosion studies of fluoride conversion coating on degradable Mg implants [J].