Hydrophobic TiO2 films were formed on metallic titanium substrates by a special treatment method in H2O2 solution with a subsequent oxidation step at 400 under air atmosphere.Component and microstructure of the oxide films were characterized by XRD and SEM methods.The contact angles of water on TiO2 film surface was measured by contact angle tester in dark condition.The corrosion behavior of superhydrophobic TiO2 film in seawater was studied by potentiodynamic polarization and EIS methods.Results indicated that: the hydrophilic TiO2 film exhibited an excellent corrosion resistance in seawater.Nyquist/Bode diagrams (Fig.a.) and Polarization curves (Fig.b.) of Ti and TiO2/Ti electrodes in seawater.As shown in Fig.a,the hydrophobic TiO2/Ti exhibited an even larger impedance response in seawater.The Bode plots showed that the capacitive responses of the test samples were not corresponding to the pure capacitors behavior.Usually,this phenomenon was related to the rough surface.The Ti and TiO2/Ti exhibited relatively lower current densities from the Polarization curves,the icorr of TiO2/Ti decreased 0.5 magnitudes compared with that of the Ti,and the anodic corrosion slope of the TiO2/Ti was much gentler and lower.All of those results mentioned above demonstrated that the corrosion resistance of TiO2/Ti was better than that of Ti.