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.
|Uncontrolled Keywords:||Magnesium; Degradable biomaterial; Corrosion; Hydroxyapatite; Electrodeposition|
|Deposited By:||Dr. A K Sahu|
|Deposited On:||28 Aug 2012 12:16|
|Last Modified:||14 May 2013 10:08|
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