Abstract
Abstract TiO 2 films were deposited on commercial pure titanium (CP-Ti) by sol–gel process, dip coating technique. Coated samples were calcined at various temperatures. The effects of calcination temperature on the structural and electrochemical properties of coated films were investigated. The results showed that the anatase peaks were obtained from the samples calcinated at 500 °C. When the calcination temperatures increased from 500 °C to 700 °C, the intensities of the anatase peaks were increased. As the calcination temperature was 900 °C, the anatase phase nearly transformed to the rutile phase. Also, thickness of TiO 2 films increased with the increasing calcination temperature. Electrochemical behavior of uncoated and coated samples was mainly investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in simulated body fluid (SBF) solution. According to test results, corrosion resistance values of TiO 2 film coated samples were higher than the uncoated CP-Ti values. Furthermore, corrosion resistance increased with increasing calcination temperature and the best result was observed from the sample calcinated at 900 °C.
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