FIELD: physics.
SUBSTANCE: method includes preliminary chemical and mechanical treatment of a surface, depositing an intermediate zinc layer by chemical deposition from a multi-component zinc-containing solution followed by removal of said layer, re-depositing the zinc layer using a similar technique and depositing, by chemical reduction, a target nickel-phosphorus layer from a solution of a mixture of multi-component nickel and phosphorus compounds. A process additive of amino acetic acid is further added in amount of 10-15 g/l to the solution. The process of obtaining the desired coating is carried out in a single cycle at temperature of 80-90°C. After depositing the nickel-phosphorus layer, heat treatment is carried out at temperature not higher than 400°C.
EFFECT: high adhesion and strength of the coating.
1 dwg
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