The invention relates to equipment for the electrolytic treatment of metals and alloys surface. Its task consists in obtaining oxide coatings to improve the heat resistance, wear resistance and corrosion resistance of surfaces of parts and can be used in mechanical engineering, chemical, aerospace and other industries.; The apparatus comprises a source of micro-arc oxidation voltage is cycled 1 with two terminals, one of which is connected to the oxidizable workpiece 2, and the other - with the electrode 3.; The electrode 3 is made of titanium or stainless steel, is formed a tubular shape with the openings 4 in the side of the reaction surface of the electrode 5 3. Side electrode 5, the reaction surface 3 with the openings 4 positioned in the recess oxidizable member 2 formed its concave surface 6 with electrode 3 is placed on the concave surface parts oxidizable opornotsentriruyuschih by insulating elements 7 and 8, made of polyurethane, oxidizable space between the workpiece 2 and the electrode 3 forming T reaction zone 9 micro-arc oxidation process and filled forcibly circulating electrolyte supplied through the pipe system 10 into the cavity 11 from the top of the electrode 3. The geometrical form of the outer surface 5 of the reaction electrode 3 is formed such that the distance between the outer reaction electrode 3 and the concave surface 5 6 oxidizable surface of the workpiece 2 is the same at all points of the reaction zone 9.; Upper opornotsentriruyuschey element 7 is designed as a ring poleuretanovogo outer surface which contacts the concave surface 6 oxidizable member 2 and the inner - surface 5 with the reaction electrode 3, on the end surface of the polyurethane ring 7 is provided with holes to contain efflux pipe ends. Lower opornotsentriruyuschy member is made of polyurethane in the form of liner 8 to the convex part, whose shape corresponds to the concave portion 2. The upper parts oxidizable; part of the insert 8 has a base recess 12 for coaxially accommodating the base end of the electrode 3 with respect to the concave surface 6 of the oxidizable components 2.; The electrolyte solution is supplied through conduit 10 into the cavity 11 of the electrode 3, where Feedthrough 4 side of the reaction surface of the electrode 5 3 enters the reaction zone 9 micro-arc oxidation process, formed by the concave surface 6 oxidizable electrode parts 2 and 3.; Upper opornotsentriruyuschy member 7 is made of a polyurethane in the form of a ring which is transparent and thus allows to observe therethrough the process of micro-arc oxidation (burning electric arc).; The electrolyte from the reaction zone 9 via conduit 13 is pumped via pump 14 and cooled in heat exchanger 15, through conduit 10 re-enters the cavity 11 of the electrode 3 and the reaction zone 9.
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