METHOD FOR PRODUCING PROTECTIVE SUPERHYDROPHOBIC COATINGS ON ALUMINIUM ALLOYS

摘要

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 CHOK·0.5HO 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/cmfollowed 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