Abstract
Technological foundations are developed for the electrochemical oxidation of nickel superalloys containing alloying elements Re, Ta, Nb, Co, W, Cr, Mo, and Al. It is shown that nickel, cobalt, and aluminum pass to a sulfuric acid solution when an asymmetric sinusoidal industrial-frequency alternating current is applied and 70–75% tungsten, molybdenum, tantalum, niobium, and rhenium are concentrated in an anode cake. When a nitric acid electrolyte is used, rhenium, nickel, cobalt, aluminum, and chromium pass to a solution and tungsten, molybdenum, tantalum, and niobium are concentrated in an anode cake. Technological versions of the processing of the oxidation products with the formation of marketable products are discussed.
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