Iron passivated chemically in chromate solutions over a range of pH was electrochemically reduced in phosphate-borate buffer solution of pH 8.5. According to the chronopotentiometry, the passive fllm became thinner as the pH diminished, which was in agreement with the ellipsometric result. The rest
Electrochemical passivation of iron in phosphate medium
β Scribed by Jaouad Benzakour; Ahmed Derja
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 322 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0013-4686
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The mechanisms of formation of the passivating film and of anodic dissolution in the presence of this film have been studied at different potentials. In the low potential region, E < -0-4 V(sce), the data fit the preferential-dissolution/-adsorption mechanism: anodic dissolution proceeds by the dire
## Abstract The electrochemical behaviour of zinc in NaOH solutions has been investigated by using potentiodynamic technique and complemented by Xβray analysis. The E/i curves exhibit active, passive and transpassive regions prior to oxygen evolution. The active region displays two anodic peaks. Th
## A&r&-Electrochemical impedance data for single crystal Ni( 111) in phosphate buffer solutions of pH 9, 10, and 11 and at potentials spanning the passive range (0.1-0.5 V/see) are interpreted in terms of a point defect model for the passive film in which the kinetics of generation and annihilati