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 ±...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2019-01, Vol.166 (2), p.C76-C82
Main Authors: Liu, Y., Schaller, R. F., Asselin, E.
Format: Article
Language:English
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Summary: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 acceleration of the cathodic reactions due to the introduction of oxidants for Ti-2. Cu(II) was more effective than Fe(III) at inducing the passivation of Ti-2 for the conditions investigated here.
ISSN:0013-4651
1945-7111
DOI:10.1149/2.1021902jes