METHOD OF PRODUCTION OF THE PROTECTIVE COATING ON THE SURFACE OF THE METAL Russian patent published in 2007 - IPC C23C28/00 

FIELD: chemical industry; food industry; methods of production of the protective coating on the surface of the metal.

SUBSTANCE: the invention is pertaining to the field of chemical industry and food industry, in particular, the invention may be used at production on the metallic surfaces of the details of the coatings resistant to the action of the aggressive and high-temperature mediums, mainly of the anti-adhesive coatings in the chemical engineering and the alimentary engineering. The method provides for the plasma spraying of the adhesive metallic substrate and the subsequent forming of the layer of fluoroplastic with its meltback. The plasma spraying of the adhesive substrate is exercised at the electric current intensity of 90-110 A, the voltage of 30-45 V with its subsequent heat treatment at the temperature of650-800°С. The meltback of the fluoroplastic coating is conducted at the temperature of 250-270°С within 3-5 hours. Then the adhesive substrate made on the basis of the copper-zinc alloy is sprayed on. The protective coating is produced on the surface of the aluminum alloy or the carbon steel. The technical result of the invention consists in the increased strength of the cohesion of the coating with the substrate due to reduction of the thermal tensions between them.

EFFECT: the invention ensures the increased strength of the cohesion of the coating with the substrate due to reduction of the thermal tensions between them.

2 cl, 2 ex