• bioceramic;
  • corrosion;
  • electrophoretic deposition;
  • TiAl6V4

In the present study, Al2O3–Ti coated on TiAl6V4 alloy used electrophoretic deposition (EPD) method to improve the corrosion resistance and biocompatibility. Electrophoretic deposition process was performed at 90 s and constant voltage of 50 V in various compositions of 30, 50, and 70 wt% of Al2O3. After deposition, samples were dried at room temperature and then the coated samples were sintered at 1050 °C for 4 h. Scanning electron microscope and X-ray diffraction analysis were employed to investigate the microstructure and phase analysis of the coatings. Moreover, the behavior of the coated samples was investigated by using electrochemical impedance spectroscopy and polarization tests. The results show that the Al2O3–Ti composite coatings sintered at an inert gas (argon) atmosphere reveals a uniform, dense coating, which includes the composition of Ti and Al oxide phases. Evaluation of electrochemical test in simulated body fluid represents the improvement of the corrosion resistance of the coated sample in comparison to uncoated TiAl6V4 sample. Moreover, the 50 wt% of Al2O3 composite coated sample revealed the highest corrosion resistance among the coated samples due to a uniform and more stable phase composition in comparison to other coated samples.