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Degradation susceptibility of surgical magnesium alloy in artificial biological fluid containing albumin

Published online by Cambridge University Press:  31 January 2011

Chenglong Liu ,
Yunchang Xin ,
Xiubo Tian  and
Paul K. Chu
Chenglong Liu
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Kowloon, Hong Kong, People’s Republic of China
Yunchang Xin
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Kowloon, Hong Kong, People’s Republic of China; and Tsinghua University, Shenzhen Graduate School, Shenzhen 518055, China
Xiubo Tian
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Kowloon, Hong Kong, People’s Republic of China; and State Key Laboratory of Welding Production Technology, School of Material Science and Engineering, Hargin Institute of Technology, Heilongjiang 150001, China
Paul K. Chu*
Affiliation:
Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Kowloon, Hong Kong, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The objective of this study is to investigate the corrosion susceptibility of surgical AZ91 magnesium alloys in simulated body fluids (SBFs) consisting of bovine serum albumin (BSA) and acidic SBFs (pH 5) using electrochemical methods. The addition of BSA significantly moves the open-circuit potential toward a more positive value and suppresses the corrosion reaction. The corrosion resistance under the open-circuit conditions in the SBFs with 1 g/L BSA is approximately twice that in the SBFs. A higher BSA concentration decreases the corrosion susceptibility. In addition, the acidic SBF results in a higher alloy dissolution rate. The possible mechanisms are discussed.

Keywords

CorrosionMg
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 7 , July 2007 , pp. 1806 - 1814
Copyright
Copyright © Materials Research Society 2007

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