FIELD: electrical engineering, formation of corrosion-, heat- and wear-resistant coats. SUBSTANCE: proposed electrolyte for microplasma oxidizing of valve metals and their alloys includes sodium hydroxide, sodium aluminate and water. It additionally contains raw material extract of vegetable origin produced under mass relation of raw material and extracting agent not less than 0.01 and remelted singly replaced sodium phosphate. Proportion of components is as follows, per cent by mass: sodium hydroxide 0.1-0.5; sodium aluminate 0.1-1.0; remelted sodium phosphate 0.2-1.0; extract of raw material of vegetable origin 1.0-20.0 and water being the balance. Injection of extract of raw material of vegetable origin carrying remelted singly replaced sodium phosphate into electrolyte results in increased hardness and chemical resistance of coat with maintenance of sane thickness. Duration of stable work of electrolyte in this case increases. EFFECT: increased duration of stable work of electrolyte. 1 tbl
