Abstract
The effectiveness of hydroxyapatite (HA) coating prepared by electrodeposition technique in improving the corrosion resistance of commercially pure magnesium (CP-Mg) in simulated body fluid (SBF) is addressed. The coating formed in as-deposited condition is identified as dicalcium phosphate dehydrate (DCPD) (Brushite), which is converted to HA after immersion in 1 M NaOH at 80°C for 2 h. The XRD patterns and FTIR spectra confirm the formation of DCPD and HA. During electrodeposition, the H2PO4 − ion is reduced and the reaction between Ca2+ ions and the reduced phosphate ions leads to the formation of DCPD, which is converted to HA following treatment in NaOH. The deposition of HA coating enables a threefold increase in the corrosion resistance of CP-Mg. The ability to offer a significant improvement in corrosion resistance coupled with the bioactive characteristics of the HA coating establish that electrodeposition of HA is a viable approach to engineer the surface of CP-Mg in the development of Mg-based degradable implant materials.
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The authors express their sincere thanks to Dr. S. Srikanth, Director, National Metallurgical Laboratory, Jamshedpur, for his constant support and encouragement to carry out this research study and permission to publish this article.
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Jamesh, M., Kumar, S. & Sankara Narayanan, T.S.N. Electrodeposition of hydroxyapatite coating on magnesium for biomedical applications. J Coat Technol Res 9, 495–502 (2012). https://doi.org/10.1007/s11998-011-9382-6
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DOI: https://doi.org/10.1007/s11998-011-9382-6