Effects of Sn and Mo contents on the electrochemical behavior of biomedical Ti-Mo-Sn alloys prepared in the powder metallurgy process

The aim of this study was to investigate the effects of Sn and Mo contents on electrochemical behavior and phase analysis of Ti12Mo23Sn (wt.%) and Ti23Mo12Sn (wt.%) alloys for biomedical applications. The samples were manufactured by blended combining the elemental method from a sequence of uniaxial and cold isostatic pressing with subsequent densification by sintering at 1000°C, in protective gas atmosphere. The corrosion resistance of the studied alloys in Ringer's solution were determined. The structural properties were examined by scanning electron microscopy (SEM + EDS) and X-ray diffraction (XRD). X-ray phase analysis shows two phases: β-Ti and Ti³Sn for both samples. The proposed quantitative composition of the tested samples was confirmed in the chemical analysis. The results of the electrochemical analysis reveal that the open circuit potentials recorded for the Ti12Mo23Sn and Ti23Mo12Sn samples were quite similar. Moreover, obtained results indicate that the titanium alloy composed of 23 wt.% of Mo and 13 wt.% of Sn exhibited slightly better corrosion resistance than the Ti12Mo23Sn sample with lower concentration of Mo (12 wt%) in the Ringer`s solution.