Corrosion behavior of Ti-Mo alloys cold rolled and heat treated

Corrosion behavior of (α + β) Ti-10Mo and β Ti-20Mo (mass%) alloys cold rolled and solution heat treated was investigated by studying the anodic polarization curves at 310 K in 5 mol% HCl solution to determine the potential use of those alloys in biomedical applications. The anodic films formed on the surfaces of the alloys were examined using X-ray photoelectron spectroscopy analysis and scanning electron microscopy. The results reveal that both of the Ti-Mo alloys cold rolled and solution treated exhibit a passive behavior in 5% HCl solution, which is attributed to the passive film formation of a mixture of MoO₃ and TiO₂. The cold rolling process does not influence the formation of passive films on the Ti-Mo alloys although it slightly increases the passive current densities. The corrosion resistance of the Ti-Mo alloys increases with Mo content and both of the Ti-Mo alloys exhibit better corrosion resistance than commercial pure Ti—the currently used metallic biomaterial.