Bio-Corrosion of Magnesium Alloys for Orthopaedic Applications

Three Mg alloys, Mg-1.34% Ca-3% Zn (MCZ), Mg-1.34% Ca-3% Zn-0.2% Sr (MCZS), and Mg-2% Sr (MS), were examined to understand their bio-corrosion behavior. Electrochemical impedance spectroscopy and polarization scans were performed after 6 days of immersion in cell culture medium, and ion release and...

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Bibliographic Details
Published in:Journal of functional biomaterials 2017-09, Vol.8 (3), p.38
Main Authors: Brooks, Emily K, Ehrensberger, Mark T
Format: Article
Language:English
Subjects:
alloy
Alloys
biomaterial
Calcium
Cell culture
Corrosion
Corrosion resistance
Corrosion resistant alloys
Culture media
Electrochemical impedance spectroscopy
Electrochemistry
Electron microscopy
Magnesium
Magnesium base alloys
orthopaedics
pH effects
Scanning electron microscopy
Spectroscopy
Strontium
Zinc
Zinc base alloys
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Summary:Three Mg alloys, Mg-1.34% Ca-3% Zn (MCZ), Mg-1.34% Ca-3% Zn-0.2% Sr (MCZS), and Mg-2% Sr (MS), were examined to understand their bio-corrosion behavior. Electrochemical impedance spectroscopy and polarization scans were performed after 6 days of immersion in cell culture medium, and ion release and changes in media pH were tracked over a 28 day time period. Scanning electron microscopy (SEM) of alloy microstructure was performed to help interpret the results of the electrochemical testing. Results indicate that corrosion resistance of the alloys is as follows: MCZ > MCZS > MS.
ISSN:2079-4983
2079-4983
DOI:10.3390/jfb8030038