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Activation studies on titanium anodes used in MnO2 electrodeposition

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Abstract

Titanium anodes from the electrolysis of electrolytic manganese dioxide (EMD) were activated chemically and electrochemically. The surfaces of activated and nonactivated titanium were characterized. Unlike nonactivated titanium, activated titanium evolved hydrogen and displayed a steady open circuit voltage. Hydrides precipitated on both activated and nonactivated surfaces. The passivating film grown on the anode during EMD deposition thinned during partial cathodic reduction and changed in composition from TiO2 to TiO x . Titanium anodes precoated with a thin layer of MnO2 showed a delay in cathodic activation proportionally to the thickness of the precoat. A considerable difference in hydrogen diffusivity through thin and thick precoats is inferred from the time delay to activate the titanium surface.

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Authors and Affiliations

  1. RAYOVAC Corporation, 53711, Madison, WI, USA

    M. E. Armacanqui & R. J. Ekern

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  1. M. E. Armacanqui
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  2. R. J. Ekern
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Armacanqui, M.E., Ekern, R.J. Activation studies on titanium anodes used in MnO2 electrodeposition. J Appl Electrochem 22, 722–727 (1992). https://doi.org/10.1007/BF01027500

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  • DOI: https://doi.org/10.1007/BF01027500

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