Abstract
The corrosion, passive layer characteristics, and surface morphology of Ti-45Nb in fluoride-containing H2SO4 solutions are evaluated through electrochemical measurements and surface profilometry. Ti-45Nb spontaneously passivated in solutions with 0 and 0.0025 M F−, contrasting with the active-passive behaviour observed at 0.025 and 0.05 M F−. The corrosion resistance of Ti-45Nb decreases with increasing fluoride concentration: the passive current density in 0.05 M F− is 207 μA/cm2, which is eight times greater than the value obtained in 0 M F− (26 μA/cm2).
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