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Formation of Coatings on Rectifying Metals and Alloys by Microarc Oxidizing in Electrolytes with a Capacitive Energy Control P. S. Gordienkoa, O. S. Vasilenkoa, E. S. Panina, S. B. Bulanovaa, D. V. Dostovalovb,
A. D. Zhirnovc, and S. V. Korkoshd a Institute of Chemistry, Far East Division, Russian Academy of Sciences,
pr. Stoletiya Vladivostoka 159, Vladivostok, 690022 Russia e-mail:
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b Far East State Technical University, Vladivostok, Russia c All-Russian Research Institute of Aviation Materials d Central Research Institute of Construction Materials “Prometei” Received April 19, 2005 Abstract — Coating formation on titanium and aluminum samples in aqueous electrolytes at breakdown potentials (under conditions of microarc oxidizing) is described. The oxidizing was performed with either no current restriction during the oxide film breakdown or with an additional reactive resistance in the external circuit allowing to control the energy input intensity to the breakdown channels. It is shown that the external reactive resistance increases the coating formation potentials with no visible additional breakdown areas; the final coating formation currents decrease by order of magnitude; the energy evolved in the electrolyte decreases by a factor of 5 to 10. The variable external reactive resistance allows forming coatings with novel properties. PACS numbers: 81.65.Rv, 82.45.Bb DOI: 10.1134/S0033173206050043
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