FIELD: metallurgy.
SUBSTANCE: method involves placing products into a pressure tight electric furnace, preheated to a temperature of 250-300 °C, a continuous supply of superheated water steam into the electric furnace, which forms pressure in the furnace of 0.15-0.2 atm, conditioning of products in the superheated water steam for 10-20 min with a simultaneous increase in temperature in the electric furnace up to 450-550 °C and conditioning of the products at this temperature for 15-30 min.
EFFECT: invention facilitates preparing the surface of metal products for coating using an environmentally friendly method without using chemical additives and substances as well as improves adhesion of coatings with the surface of products by forming an underlayer as an oxide film of optimum thickness and porosity on the surface.
2 dwg
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