Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6617024 | Electrochimica Acta | 2013 | 30 Pages |
Abstract
The anodic dissolution of hcp-cobalt in sodium nitrate solution under near-ECM conditions was investigated in situ by using a specially designed flow channel cell. The in situ investigation was focused on current densities of 5Â A/cm2 and 10Â A/cm2. Cobalt dissolves actively as cobalt (II) ion with a current efficiency close to 100%. In contrast to copper, the current-voltage relation does not show an active-passive transition. The dissolution strongly depends on the crystallographic orientation of the grains. The lowest dissolution rate was observed on plains vicinal to the basal plane {0Â 0Â 0Â 1}. No gas evolution was observed. The surface roughness is determined by the micro roughness on the individual grains.
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Authors
M. Schneider, N. Schubert, S. Höhn, A. Michaelis,