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The effect of microstructure and the related bio-corrosion behavior of AZ91D Mg alloy in SBF artificial body fluid

Liu Junwei (State Key Laboratory of Metastable Materials Science and Department of Technology, Yanshan University, Qinhuangdao, China and Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang, China.)
Lu Shiqiang (Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang, China.)
Hou Jianbao (Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang, China.)
Ouyang Zipeng (Shanghai Aerospace Fine Mechanics Research Institute, Shanghai, China.)
Ren Mingliang (Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang, China.)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 5 May 2015

216

Abstract

Purpose

The effect of SBF artificial body fluid on microstructure and morphology characteristics of AZ91D alloy was investigated using OM, SEM and XRD. The effect of corrosion on mechanical properties also was researched.

Design/methodology/approach

The results show that the corrosion weight loss rate initially increased, then clearly decreased, and finally remained steady. Pits began to appear when the sample was placed in a corrosive environment for five days and pitting gradually increased with longer exposure time.

Findings

The pits, which made the grain boundaries indistinct, first appeared near the grain boundary area and then gradually increased in area.

Originality/value

The main mode of corrosion is pitting and the primary corrosion product, MgOH2, could be observed after five days of corrosion.

Keywords

Citation

Junwei, L., Shiqiang, L., Jianbao, H., Zipeng, O. and Mingliang, R. (2015), "The effect of microstructure and the related bio-corrosion behavior of AZ91D Mg alloy in SBF artificial body fluid", Anti-Corrosion Methods and Materials, Vol. 62 No. 3, pp. 182-186. https://doi.org/10.1108/ACMM-01-2015-1497

Publisher

:

Emerald Group Publishing Limited

Copyright © 2015, Emerald Group Publishing Limited

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