ANTIFRICTION COATING OF COPPER-FLUOROPLASTIC Russian patent published in 2019 - IPC C25D15/00 C25D15/02 C08J5/16 

FIELD: chemistry; machine building.

SUBSTANCE: invention relates to electrochemical production, electroplating, namely to a method of producing antifriction composite metal fluoroplastic coatings and can be used in machine building, automotive industry, marine transport and other industries. Coating is two-layered and consists of metal matrix (copper) with F-40 particles and fluoroplastic polymer outer layer. Coating thickness is 20–30 mcm. Layer of metal matrix - copper with included in it particles of fluoroplastic F-40 (copolymer of tetrafluoroethylene with ethylene) is made of electrolyte-suspension. Electrolyte suspension contains (per 1 liter of solution) copper sulphate 5-aqueous (150–250), sulfuric acid (40–70), powder of copolymer of tetrafluoroethylene with ethylene (50–200), surfactant (2.2–4.5) and water (balance up to 1 l).

EFFECT: coating has characteristics peculiar to metals (strength, wear resistance, high heat and electric conductivity) and fluoropolymers (sealing capacity, reliable adhesion to the base, high antifriction properties, water-repellent properties, corrosion resistance).

2 cl, 3 dwg, 1 ex