Promotion of Bioactive and Corrosion Resistance by Electrolytic Piezoelectric Ceramic

Biocompatibility of metallic implants and bone in orthopaedic surgery plays an important role in long-term survivor of the prosthetic implant fixation. However, titanium and its alloys do not bond to bone in the early stage of implantation (<6 months). On the other hand, titanium alloy undergoes electrochemical exchange and releases metallic ions in the physiological environment, which is believed to be the cause of implant failure. Cathodic electrolytic deposition is an important method in ceramic processing. In this paper, the nanocrystalline BaTiO3 coating were prepared by electrolytic deposition process. According to the XRD results, we can clearly identified that electrolytic deposition Barium titanate hydrate gel annealed at 350°C for 1 hr will form to BaTiO3, and its grain size about 4.85 nm. From dynamic cyclic polarization tests, we can found that dense BaTiO3 coated effective improved corrosion resistance of Ti substrate than untreated. From immersion tests, we can found that BaTiO3 exhibited excellent bioactive.