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Wear mechanisms of anodes

1989; Elsevier BV; Volume: 34; Issue: 6 Linguagem: Inglês

10.1016/0013-4686(89)87114-2

1873-3859

Fritz Beck,

Electrochemical Analysis and Applications

In industrial anode processes, the starting materials dissolved in aqueous electrolytes are oxidized at inert anodes. In most cases, metal anodes with an oxidic surface layer are employed. According to their fabrication, chemical, thermal, anodic and ceramic oxide coatings can be distinguished. This allows a wide variation with respect to electrocatalytical behaviour. Passivation phenomena play a distinct role in the formation and stabilization of these electrodes as well as in their long term behaviour. Wear mechanisms of industrial anodes in terms of ion migration through the oxide layer, depassivation and transpassive dissolution are comprehensively discussed from this viewpoint.