METHOD FOR DEPOSITING Fe-Ni-P COATINGS Russian patent published in 2022 - IPC C25D3/56 C25D5/18 

FIELD: coatings.

SUBSTANCE: invention relates to electrodeposition of Fe-Ni-P coatings on a part. The method includes electrodeposition of a coating from an electrolyte at a mains frequency AC. The coating is electrodeposited at an asymmetric AC from an electrolyte containing, g/l: FeSO₄·7H₂O 300 to 350, NiSO₄ 30 to 50, H₂SO₄ 100 to 150, ascorbic acid 1.5 to 2, NaPH₂O₂ 5 to 15, at a temperature of the electrolyte of 20 to 25°C; wherein the AC asymmetry coefficient is gradually changed from 2 to 10 by increasing the cathode current pulse density from 5 to 30 A/dm² at a rate of 4 to 10 A/dm²/min.

EFFECT: strong adhesion of the Fe-Ni-P coatings made from a sulphate electrolyte with the base, increase in the wear resistance and corrosion resistance thereof.

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