Anodic dissolution of cobalt in aqueous sodium nitrate solution at high current densities. Issue 6 (23rd May 2014)

• Record Type: Journal Article
• Authors: Schneider, M.; Schubert, N.; Höhn, S.; Michaelis, A.
• Is Part Of: Materials and corrosion. Volume 66:Issue 6(2015:Jun.)
• Page Start: 549
• Page End: 556
• Publication Date: 2014-05-23
• Subjects: Materials -- Periodicals; Metals -- Periodicals; Corrosion and anti-corrosives -- Periodicals; 620.1122305
• DOI: 10.1002/maco.201407638
• Languages: English
• ISSNs: 0947-5117

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="maco201407638-sec-0001" sec-type="section"> <p>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.</p> </sec> </abstract>