Electrodeposition of Nano Hydroxyapatite Coating on Biodegradable Mg-Zn Scaffold

In this research, porous magnesium-zinc scaffolds were prepared by powder metallurgical process and nano hydroxyapatite (hap) coating on the mg-3zn (wt.%) scaffold was prepared by pulseelectrodeposition and alkali treatment processes to improve the corrosion resistance of the scaffold. the results indicated the as-deposited coating consists of hap, dcpd and ocp with needle-like and plate-like structures and the post-treated coating was composed of needle-like particles of nano hap that developed almost perpendicularly to the substrate. electrochemical tests showed that the corrosion potential of scaffold significantly increased from -1.475 to -1.365 v and the corrosion current density reduced 1.5-fold in comparison to the scaffold modified by nano hydroxyapatite coating.