Abstract
Bionic coatings composed of hydroxyapatite (HA) were prepared on the surface of mi- croarc oxidized pure titanium. Then their morphology, phase composition and corrosion resistance were characterized by SEM, XRD electrochemical workstation respectively. The results show that a porous ceramic TiO2 coating containing Ca and P formed on pure titanium after microarc oxida- tion (MAO) process in calcium acetate-calcium biphosphate electrolyte. After a post alkali-heat (MAOAH) treatment, the holes in the treated coating became smaller and the coating became dens- er. Moreover, scale-like, lamellar- and needle-like HA appeared in the coating. The immersion test revealed an excellent corrosion resistance to the Hank's simulated body fluid (SBF) for both MAO and MAOAH coating. After corrosion test in SBF, a calcium deficient type HA(Ca8.86(PO4)6(H2O2)2) and CaTiO3 were formed in MAO coating. However, anions in SBF reacted with oxides in MAO- AH coating resulting in the increase of the diameter and depth of holes of the coating.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
