S. Kaabi, S. Nemeth, M.J. Tan, “Electrophoretic Deposition of Hydroxyapatite Coatings on AZ31 Magnesium Substrate for Biodegradable Implant Applications” 7th International Conference on Materials for Advanced Technologies (ICMAT 2013), 30-Jun-2013 to 05-Jul-2013, Suntec City, Singapore
Magnesium is highly biocompatible and it can be an alternative to currently used implants. However the
extremely high corrosion rate of magnesium and its alloys limits their widespread use. In this study hydroxyapatite (HA) coating was deposited on AZ31 substrates to alter the corrosion rate of magnesium
and improve its potential applicability as implant. Coatings were deposited electrophoretically at different
potentials from 10 to 30 volts. X -ray diffraction (XRD) patterns from the coating indicated well-defined peaks of HA structure. The morphology of coatings was examined with scanning electron microscopy (SEM) and the results showed that more uniform layer was obtained at higher deposition potential of 30 volts. The degradation rate of hydroxyapatite coated magnesium was investigated by electrochemical method in simulated body fluid (SBF). The corrosion resistance significantly improved after applying hydroxyapatite coating. After corrosion test, hydroxyapatite still remained on the surface, further indicating that the coatings had protective value.
This research was supported by A*STAR, under its Singapore International Graduate Award (SINGA) scheme; by Singapore Institute of Manufacturing Technology, A*STAR; and Nanyang Technological University. Grant number is not applicable.
The provided document is a summary of research presented at the conference.