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[Electrochemical impedance spectroscopic study of titanium in physiological environment with blood-serum protein]
1Department of Stomatology, Hengdian Group Hospital. Dongyong 322118,Zhejiang Province;China,E-mail:zjdyljx@126.com.
Purpose:
Electrochemical impedance spectroscopy (EIS) was employed to study the corrosion behaviour of titanium in dummy environment with blood-serum protein.
Methods:
EIS of titanium in PBS and cell culture fluid was acquired by advanced electrochemical system. The characteristic of EIS-Nyquist and EIS-Bode were investigated and the equivalent circuit was used to analyze the EIS results. The data was analyzed using SPSS 11.0 software package.
Results:
The corrosion resistance of the titanium in cell culture fluid was significantly higher than that in PBS (P<0.05). The phase angle of TiO₂-based passive film at low frequency decreased to 55° when titanium was in PBS, but 75° when in cell culture fluid.
Conclusions:
The blood-serum protein plays an important role in the corrosion behaviour of titanium in physiological environment.
