METHOD FOR PRODUCING PROTECTIVE SUPERHYDROPHOBIC COATINGS ON ALUMINIUM ALLOYS Russian patent published in 2015 - IPC C25D11/04 

FIELD: chemistry.

SUBSTANCE: invention refers to methods for producing superhydrophobic coatings having high protective properties providing an effective decrease of a corrosion rate when using structures and buildings made of aluminium alloys in a high-humidity environment and corrosive medium. A method involves electrolytic oxidation of a pre-cleaned product surface in an electrolyte containing, g/l: 15-25 C₄H₄O₆K₂·0.5H₂O and 1.0-2.0 NaF in the plasma microdischarge mode in the galvanostatic environment at a monopolar current density of 0.5-1.0 A/cm² followed by modifying the deposited coating by processing in ozone plasma in a combination with exposure to UV light for 20-70 min. A superhydrophobic coating is formed on the modified surface by deposition of silicon dioxide nanoparticle dispersion and a fluorosiloxane hydrophobic agent in anhydrous decane.

EFFECT: higher process and environmental safety of the method, reduced time and energy consumptions and simplifying instrumentation.

3 cl, 3 dwg, 3 ex