pH effect on the potentiodynamic behaviour of titanium electrodes

✍ Scribed by Dr. M. W. Khalil; M. A. Abdel Rahim

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 450 KB
• Volume: 22
• Category: Article
• ISSN: 0933-5137
• DOI: 10.1002/mawe.19910220707

✦ Synopsis

Abstract

Potentiodynamic measurements on mechanically polished titanium electrodes were performed in different solutions in the pH range 0.55–12. Two anodic peaks and one small cathodic peak were observed. Comparison with thermodynamic data revealed the possibility of formation of Ti~2~O~3~ or TiO~2~ at potentials corresponding to the first anodic peak probably directly from titanium hydride. The second anodic peak is interpreted as the oxidation of incorporated H to form H^+^ ions which partly remain inside the metal. The small cathodic peak represents the back reduction of the incorporated H^+^ to the metal hydride.