Electrodeposition of hydroxyapatite coating on magnesium for biomedical applications

Jamesh, M and Satendra, Kumar and Sankara Narayanan, T S N (2012) Electrodeposition of hydroxyapatite coating on magnesium for biomedical applications. Journal of Coatings Technology and Research, 9 (4). pp. 495-502.

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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 80A degrees 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.

Item Type:Article
Official URL/DOI:http://www.springerlink.com/content/l725837663gw08...
Uncontrolled Keywords:Magnesium; Degradable biomaterial; Corrosion; Hydroxyapatite; Electrodeposition
Divisions:NML Chennai
ID Code:5964
Deposited By:Dr. A K Sahu
Deposited On:28 Aug 2012 12:16
Last Modified:14 May 2013 10:08
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