Anodic reaction characteristics of tungsten in basic phosphate solutions
Corrosion Science, cilt.52, sa.9, ss.3109-3117, 2010 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 52 Sayı: 9
- Basım Tarihi: 2010
- Doi Numarası: 10.1016/j.corsci.2010.05.037
- Dergi Adı: Corrosion Science
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.3109-3117
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
DC polarization and electrochemical impedance spectroscopy techniques were used to investigate the pH dependent anodic behaviour of tungsten in basic solutions. Anodic currents of W were pH independent between pH 8 and 11. Above pH 12 as pH increased the anodic currents of W also increased. The diffusion control in pH independent regime was observed to arise from slow diffusion of the solubilized species. At higher pH levels, however, OH- ion diffusion from bulk of solution was observed to control the anodic process. Hydrate layer formation, which was observed with low frequency capacitive loop formation, accelerated with increase in pH. © 2010 Elsevier Ltd. All rights reserved.