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The mechanism of anodic dissolution of cobalt in neutral and alkaline electrolyte at high current density

: Schubert, N.; Schneider, M.; Michealis, A.


Electrochimica Acta 113 (2013), pp.748-754
ISSN: 0013-4686
Journal Article
Fraunhofer IKTS ()
anodic dissolution; cobalt; ECM; electrochemical machining

The anodic dissolution of cobalt is investigated in neutral and alkaline electrolytes at high current densities. Beside electrochemical measurements, the amount of dissolved cobalt is investigated by UV-vis-spectroscopy. The measurements are completed by optical measurements of the metal removing. It is shown that cobalt can be anodically dissolved in alkaline solutions by using a complexing agent. In this case the current efficiency is approximately 91%. The continuous anodic dissolution of cobalt starts in the transpassive range.