Influence of fluoride ion on the electrochemical behaviour of β-Ti alloy for dental implant application

The corrosion behaviour of Ti–15Mo alloy in 0.15 M NaCl containing 0.01, 0.03, 0.06 and 0.5 M NaF is evaluated and its protective ability is compared with that of CP-Ti and Ti–6Al–4V alloy, to ascertain their suitability for dental implant application. The steady state current density of CP-Ti and, Ti–15Mo and Ti–6Al–4V alloys in 0.15 M NaCl containing 0.03 M NaF at 200 mV vs. SCE is found to be 1, 2 and 6 μA/cm2, respectively, which indicate that all of them could offer a better corrosion resistance in the potential range that could exists in the oral environment.