FIELD: metallurgy.
SUBSTANCE: device for application of coating by micro-arc oxidation of parts out of valve metals and alloys at alternate voltage consists of power transformer, and of power unit connected to latter and to bath for electrolyte and measuring unit. Also the bath is connected with input of the power unit, while it output is connected with the power transformer. Additionally, the device is equipped with a control unit, a regulating element is introduced into the power block to control voltage, time of beginning and end and duration of anode and cathode cycles independently from each other. The regulating element corresponds to a diode bridge, into diagonal of which there is introduced a switching element - bi-polar of filed transistor - and connected to the control unit.
EFFECT: simplified structure of device at simultaneous expansion of process functions of micro-arc oxidation, reduced consumption of electric power.
2 cl, 4 dwg, 2 ex
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