Electrochemical impedance spectroscopic study of titanium in physiological environment with blood-serum protein
Lv, J.-x.; Weng, W.-m.
Shanghai Kou Qiang Yi Xue 23(5): 543-546
2014
ISSN/ISBN: 1006-7248 PMID: 25543595 Document Number: 675837
Electrochemical impedance spectroscopy (EIS) was employed to study the corrosion behaviour of titanium in dummy environment with blood-serum protein. 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. 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. The blood-serum protein plays an important role in the corrosion behaviour of titanium in physiological environment.