Surface modification of aluminum alloy AMg6 by ethanol solutions of alkyl phosphates

The paper considers the possibility of obtaining superhydrophobic (SHP) protective films from ethanol solutions of phosphoric acid esters (monododecyl phosphate and didodecyl phosphate) on the surface of aluminum alloy AMg6 after its pre-etching with 10% NaOH solution at t = 60°C in order to obtain polymodal roughness.It is shown that the alloy treatment in alkyl phosphate solutions leads to superhydrophobization of the surface.The stability of obtained coatings in alkylphosphate solutions is compared with similar alloy surface treatment in dodecylphosphonic and dodecanoic acid solutions.The protective ability of the coatings obtained was evaluated by polarization measurements and corrosion tests in a temperaturehumidity chamber.It was established that the best anti-corrosion properties are shown by films formed from solution containing 10 mmol•L -1 of the monododecyl-and didodecylphosphate mixture.