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.

► We investigated the corrosion behavior of Ti–10Mo and Ti–20Mo alloys cold rolled and solution heat treated.
► Both of the alloys exhibit a passive behavior due to the formation of MoO3 and TiO2.
► The cold rolling 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 Ti–Mo alloys increases with Mo content and Ti–Mo alloys exhibit better corrosion resistance than commercial pure Ti.