Localized corrosion and repassivation behaviors of additively manufactured titanium alloys in simulated biomedical solutions

Potentiodynamic polarization studies

Figure 1 shows the potentiodynamic polarization curves of the SM and AM Ti alloys in Ringer solutions at 37 °C. As shown in Fig. 1, the pitting potentials on AM Ti–6Al–4 V, AM Ti–6Al–7 Nb, and SM Ti–6Al–4V alloys are represented as 5.83 (±0.15) V, 6.68 (±0.18) V, and 7.96 (±0.45) V, respectively, whereas AM CP Ti and AM Ti–13Nb–13Zr do not exhibit a pitting behavior up to maximum 9V, depending on the substrate. Particularly, the pitting potential of AM Ti–6Al–4V was lower than that of the SM Ti–6Al–4V alloy because…