title: [Study of corrosion behavior of titanium with anodized oxidation film].
abstract: OBJECTIVE
  To investigate the variation of the corrosion resistance of anodized oxidation film on titanium by electrochemical methods.
  
  
  METHODS
  TiO2 nanotube layer was formed on Ti surface by anodization. The morphology was observed with scanning electron microscope (SEM) and the crystal phase was analyzed using X-ray diffraction(XRD) before and after annealing. Polarization curves were examined by electrochemical methods.
  
  
  RESULTS
  Titanium oxide nanotubes with 80 nm diameter and 400 nm length was seen on Ti after anodization. The annealing nanotubes was anatase crystalline phase by X-ray diffraction analysis. The self-corrosion potential and break-down potential of smooth Ti were significantly lower than TiO2 nanotubes by anodization (P < 0.05). The self-corrosion current and passived current were significantly higher than TiO2 nanotubes by anodization (P < 0.05). Annealing improved the corrosion resistance of anodized oxidation film on titanium.
  
  
  CONCLUSIONS
  The results of electrochemical examinations indicate that the TiO2 nanotubes by anodization increases the corrosion resistance of titanium.
authors: Dept. of Prosthodontics, The Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China.
authors: Wei-Qiang
authors: WQ
authors: Yu
authors: Jing
authors: J
authors: Qiu
authors: Fu-Qiang
authors: FQ
authors: Zhang