Evaluation of corrosion behaviour of Ti–25Mo alloy in chloride medium

Abstract

The corrosion behaviour of Ti–25Mo alloy in 0.9 wt% NaCl was evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and compared with that of commercially pure titanium (CP-Ti). The corrosion behaviour of Ti–25Mo alloy has been reported for the first time in this paper. The microstructure and structural characteristics were also examined using optical microscopy and X-ray diffraction (XRD), respectively. The study reveals that Ti–25Mo alloy possesses a b-phase microstructure. The Ti–25Mo alloy exhibits higher passivation range, lower average passive current density (ipass) and higher charge transfer resistance (Rct) compared to that of CP-Ti. Based on the corrosion protection ability, Ti–25Mo alloy can be a suitable alternative material for orthopaedic implant applications.