Abstract
The corrosion resistance of Ti–0.4Ni–0.015Pd–0.025Ru–0.14Cr (AKOT Ti) and commercially pure titanium (CP Ti) has been studied in different concentrations of 6, 9 and 11.5M HNO3, and boiling 15.65M HNO3. In both CP Ti and AKOT Ti alloy, the open circuit potential and corrosion potential are shifted to more noble potential with increasing concentrations. However, passive current density decreases with increasing concentration. Lower corrosion rate was observed in AKOT Ti (∼0.075mm/y) compared to CP Ti (∼0.22mm/y) in boiling 15.65M HNO3 after 240h. The mechanisms by which dissolved titanium ions affect the corrosion are also discussed.
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