Oudot, Magaly and Cassayre, Laurent
and Chamelot, Pierre
and Gibilaro, Mathieu
and Massot, Laurent
and Pijolat, Michèle and Bouvet, Sylvie
Layer growth mechanisms on metallic electrodes under anodic polarization in cryolite-alumina melt.
(2014)
Corrosion Science, 79. 159-168. ISSN 0010-938X
|
(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 1MB |
Official URL: http://dx.doi.org/10.1016/j.corsci.2013.10.040
Abstract
The anodic behavior of Fe, Ni, Co electrodes was investigated in a cryolite-alumina melt at 960 °C, by electrochemical techniques, microstructural characterizations and thermodynamic calculations, to provide a fundamental understanding of layers formation at metal (M) electrode surface. At low overpotential, anodic dissolution of M occurs; when the Mn+ concentration at the surface reaches saturation, a MxAl3-xO4 spinel phase precipitates. Then, a dense MyO layer grows at the metal/spinel interface. As for Fe, polarization at higher overpotentials lead to the same layers of spinel and monoxide, but pores at the metal/FeyO interface cause loss of adhesion of the oxide film.
Item Type: | Article |
---|---|
Additional Information: | Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Corrosion Science website : http://www.sciencedirect.com/science/journal/0010938X |
HAL Id: | hal-00948663 |
Audience (journal): | International peer-reviewed journal |
Uncontrolled Keywords: | |
Institution: | Other partners > Rio Tinto Alcan (FRANCE) French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Other partners > Ecole Nationale Supérieure des Mines de Saint-Etienne - ENSMSE (FRANCE) Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) |
Laboratory name: | |
Funders: | Rio Tinto Alcan |
Statistics: | download |
Deposited On: | 18 Feb 2014 14:53 |
Repository Staff Only: item control page