Abstract
Titanium (ASTM F76) samples received three different surface treatments after which the resulting oxides were characterized and the corrosion behavior was evaluated. No differences in the corrosion potential ( E corr) were observed for the non-passivated and passivated Ti samples. However, the anodized Ti samples exhibited a significantly more noble E corr. At potentials higher than E corr, significant differences in current densities were observed for all three different Ti surfaces, with lower current densities observed for anodized Ti samples as compared to the non-passivated and passivated Ti samples. X-ray photoelectron spectroscopy indicated predominantly TiO 2 on all Ti surfaces, with a higher concentration of carboxyl species for the anodized Ti surfaces as compared to the non-passivated Ti surfaces. Auger electron spectroscopy revealed a 10-fold thicker oxide layer for anodized Ti surfaces as compared to non-passivated and passivated Ti surfaces.
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