Corrosion behaviors of TiO2 nanotube layers on titanium in Hanks solution
It is well known that the growth of osteoblast cultured on titanium with nanotube layers can be significantly increased compared to unanodized surfaces. In the current study, the corrosion behavior of titanium with nanotube layers was studied in naturally aerated Hanks solution using open circuit potentials (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests. The electrochemical results indicated that TiO2 nanotube layers on titanium showed a better corrosion resistance in simulated biofluid than that of smooth-Ti. The OCP, corrosion rate (Icor r), passive current density (Ipass) and the oxygen evolution potential (Eo) were significantly influenced by titanium oxide nanotube layers acquired by anodization. The anatase nanotube layer showed higher OCP and smaller current density than the amorphous nanotube layer. EIS analysis showed that the annealing had a significant effect on the corrosion resistance of the outer tube layer (Rt), but little effect on the corrosion resistance of the inter-barrier layer (Rb) for nanotube layers. The results suggested that titanium with TiO2 nanotube layers has an adequate electrochemical behavior for use as a dental implant material.
Wei-qiang Yu Jing Qiu Ling Xu Fu-qiang Zhang
Department of Prosthodontics, Ninth Peoples Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai, 200011, Peoples Republic of China
国际会议
上海
英文
173-179
2011-12-28（万方平台首次上网日期，不代表论文的发表时间）