FIELD: metallurgy.
SUBSTANCE: procedure consists in electro-chemical treatment corresponding to plasma-electrolytic oxidation in galvanic-static mode at effective current density 0.05 - 0.20 A/cm2 and final voltage of forming 60 - 380 V during as long, as 5 min in electrolyte, including oxalate of iron and/or nickel acetate.
EFFECT: production of magnet-active oxide coating on valve metals and their alloys in one stage.
2 cl, 2 dwg, 8 ex
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