Anodic dissolution of cobalt in aqueous sodium nitrate solution at high current densities

Anodic dissolution of cobalt in aqueous sodium nitrate solution at high current densities
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高电流密度下硝酸钠水溶液中钴的阳极溶解

DOI:
10.1002/maco.201407638
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发表时间:
2014
期刊:
Materials and Corrosion
影响因子:
--
通讯作者:
A. Michaelis
A. Michaelis
中科院分区:
--
文献类型:
--
作者:
M. Schneider;N. Schubert;S. Höhn;A. Michaelis

文献摘要

参考文献

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本工作的重点是在2.9 mol/L的硝酸钠溶液中,在25和30 A/cm 2的电流控制条件下,钴的阳极溶解和表面织构的发展。在电化学实验之前,通过EBSD研究了样品的晶体取向。在电流控制溶解过程中,使用特殊的电化学流通池在显微镜下观察钴的阳极行为以及表面形貌。通过SEM/EDX分析完成实验。作者证明,在高电流密度下的溶解过程与样品的结晶取向无关,并导致表面抛光。电流效率约为100%。在25 A/cm 2下仅检测到微弱且暂时的氧析出。
The present work focuses on the anodic dissolution of cobalt and the surface texture development in 2.9 mol/L sodium nitrate solution under current controlled conditions at 25 and 30 A/cm2. Before the electrochemical experiments the crystallographic orientation of the samples was investigated by EBSD. The anodic behavior of cobalt as well as the surface topography was microscopically observed using a special electrochemical through flow cell in‐operando during the current controlled dissolution. The experiments were completed by SEM/EDX‐analysis. The authors evidence that the dissolution process at high current densities is independent of the crystallographic orientation of the sample and leads to a surface polishing. The current efficiency is approximately 100%. Only a weak and temporary oxygen evolution was detected at 25 A/cm2.
DOI: --
发表时间: 2013
期刊:
影响因子: --
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发表时间: 2011-09
影响因子: 6.6
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