Effect of Fe(III) and Cu(II) on the Passivation of Ti-2 in Acidic Chloride Solutions

The passivation of Ti-2 by Fe(III) and Cu(II) species in acidic chloride solutions was investigated by electrochemical techniques. It was found that the critical concentrations of Fe (III) and Cu(II) species required to induce passivation of Ti-2 increased from 1.0 ± 0 to 6.0 ± 0 mM and from 0.25 ± 0 to 1.15 ± 0.23 mM, respectively, when the temperature was increased from 30°C to 80°C. The mechanism associated with the passivation was the...