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Characterization of the Passive State on Zinc
- Source :
- Journal of The Electrochemical Society. 145:3141-3149
- Publication Year :
- 1998
- Publisher :
- The Electrochemical Society, 1998.
-
Abstract
- Despite intensive investigations, the nature of the passive state is one of the most complex and unresolved subjects in the electrochemistry of zinc in alkaline solutions. In this paper, we explore the electrochemistry of the passive state on zinc in 0.1 M sodium borate/1 M sodium hydroxide solution of pH 10.5. During the course of passivation, several characteristic features in the anodic region are observed, including a wide passive range extending over >2 V and a secondary passivation phenomenon that occurs at high anodic potentials. The steady-state current in the passive state is found to be independent of the applied voltage, which is consistent with the barrier layer being an interstitial zinc conductor or an oxygen vacancy conductor (or both) with interstitial zinc being the most likely defect. This model is also consistent with the well-known n-type character of the passive film on zinc.
- Subjects :
- Passivation
Renewable Energy, Sustainability and the Environment
Anodizing
Inorganic chemistry
chemistry.chemical_element
Buffer solution
Zinc
Condensed Matter Physics
Electrochemistry
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Anode
Barrier layer
chemistry.chemical_compound
chemistry
Basic solution
Materials Chemistry
Subjects
Details
- ISSN :
- 19457111 and 00134651
- Volume :
- 145
- Database :
- OpenAIRE
- Journal :
- Journal of The Electrochemical Society
- Accession number :
- edsair.doi...........2a6c4b13613e7783c55c56ea26f94921