Abstract
The corrosion behavior of titanium alloy without vanadium Ti-6Al-7Nb under simulated biological conditions was investigated and compared with that of titanium and Ti-6Al-4V alloy, which employed as biomaterials. The aim of the present study was to evaluate their corrosion performance through the analysis of open circuit potential (OCP) and corrosion resistance using electrochemical impedance spectroscopy (EIS) tests. A high corrosion resistance was obtained for Ti-6Al-7Nb compared to that of titanium and Ti–6Al–4V alloy, indicating a typical passive behavior for Ti-6Al-7Nb alloy, which can be attributed to a highly stable film formed on Ti-6Al-7Nb alloy in Hank’s solution. The corrosion resistance of the three electrodes was in the order of Ti > Ti-6Al-7Nb > Ti-6Al-4V . Thus, Ti-6Al-7Nb can be used instead of Ti-6Al-4V to avoid the problems related with vanadium.