FIELD: electrodeposition of coatings. SUBSTANCE: invention relates to electrolytic microarc deposition of protective inorganic coatings on carbon steel parts. 25-35 wt % alumina dust, 25-35 wt % aluminium oxide powder, and [CrAl3(H3PO4)8,8-9,6] to balance diluted with water in proportion 3:1. Thereafter electrolytic microarc treatment is conducted in alkali electrolyte with current density 5-25 A/sq.dm. EFFECT: increased strength and thickness of coating and value of breakdown voltage. 2 tbl
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