23 Jul METHOD OF CHEMICAL COATING FROM NICKEL-PHOSPHORUS ALLOY
Abstract
FIELD: technological processes.SUBSTANCE: invention relates to chemical application of metal coating of nickel-based alloys and can be used in machine building, instrument making and aircraft engineering for making corrosion-resistant, wear-resistant and decorative coatings. Method involves holding articles in an aqueous solution containing components at following ratio, mol/l: nickel salt 0.075-0.125; lead salt (0.6-1.2)·10; sodium hypophosphite 0.28-0.40; glycine 0.10-0.40; orthophosphoric acid 0.10-0.30; sodium tetraborate 0.05-0.10, wherein application of coating is performed at solution temperature 70-93 °C and pH 6.3-8.7. Application of coating can be performed on surface of items made of steel, copper and alloys thereof, aluminium and alloys thereof, plastic or fibre and tissue structures from natural or synthetic materials.EFFECT: invention ensures production of high-quality nickel-phosphorus coating, containing from 5 to 8 % phosphorus, higher efficiency and low power consumption.3 cl, 1 tbl, 9 ex
Year: 2016
Country: RU
Doc No: 2592654