METHOD FOR OBTAINING CONDUCTIVE SUPERHYDROPHOBIC COATINGS ON MAGNESIUM ALLOYS Russian patent published in 2022 - IPC C25D11/30 C23C28/00 

FIELD: protective coatings.

SUBSTANCE: invention relates to the production of protective superhydrophobic coatings with conductive properties on products and structures made of magnesium alloys, and can be used in the processing of structural materials for the automotive industry, aviation industry, electrical, radio engineering and other industries. The method includes plasma-electrolytic oxidation of a magnesium alloy product in an electrolyte containing, g/l: sodium water glass Na₂O(SiO₂)_n (n=2.5) 10-50 and sodium fluoride NaF 1-10, with variable polarization of the treated surface in galvanostatic mode: at a current density of 0.10-0.15 A/cm² during anodic polarization of the oxidized surface and 0.01-0.10 A/cm² during its cathodic polarization and voltage increasing from 10-30 V to 300 -400 V for 10-30 min, followed by application of a composition containing TUBALL, which is a 2% solution of polyvinylidene fluoride in N-methyl-2-pyrrolidone, modified with the addition of 0.4 wt. % of single-wall carbon nanotubes, and ultrafine powder of polytetrafluoroethylene (UPTFE) at a mass ratio of carbon nanotubes:UPTFE=1:1-5, after which the applied coating is dried at a temperature of 40-70°C for 1-3 hours.

EFFECT: improving the protective properties of coatings, including enhancing their hydrophobic and anti-corrosion properties, increasing durability by reducing the adhesion of ice and ice-frost deposits by imparting conductive properties to coatings that prevent the accumulation of a static electric charge.

1 cl, 2 dwg, 4 ex