FIELD: chemistry.
SUBSTANCE: method involves preparing an aqueous solution substantially consisting of oxide nanoparticles and having pH 9-13, dissolving therein a prepolymer with viscosity of 3000-25000 mPa·s, depositing the solution on a substrate at temperature below 50°C and drying by heating. Overall duration of depositing and drying is less than 10 s. The prepolymer is obtained by polycondensation while mixing a first-category compound selected from a polyamine, a polyalcohol, a mixture thereof, with a second-category compound selected from a group comprising a polycarboxylic acid, a polycarboxylic anhydride, a polyepoxy, a polyisocyanate and any mixture of two thereof. The coating layer has thickness of 50-500 nm.
EFFECT: high protection of the metal from corrosion and high adhesion of paint when applied.
9 cl, 4 dwg
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