Processing Of Superamphiphobic Surface Of Al-Mg Alloy By Electrochemical Corrosion Method

In nature,lotus leaf surface is a typical superhydrophobic surface,water droplets on which can be free to roll and remove the surface dust to achieve self-cleaning effect,this effect is also known as the lotus leaf effect.Inspired by these superhydrophobic surfaces in nature,researchers have succeeded in preparing superhydrophobic surfaces by a variety of methods and the prepared superhydrophobic surfaces have excellent properties.However,once the superhydrophobic surface encounters low surface energy liquid such as oil droplets,it will lose the superhydrophobic property.The preparation of superamphiphobic surface can improve the application of surface in oily environment.Aluminum alloy has a wide range of applications in the aviation,aerospace and shipbuilding industries due to its advantages of light weight,high strength and good corrosion resistance.Therefore,the preparation of super-dully surface in aluminum alloy has important research value.In this paper,a series of experiments and theoretical explorations based on the simple and environmentally friendly electrochemical special processing technology were carried out to solve the problems existing in the preparation process of superamphiphobic surface of aluminum alloy.Experimental parameters to achieve control of surface wettability.The economical and environment-friendly neutral salt solution was selected as the electrolyte.The desired microstructure was formed on the surface of the aluminum-magnesium alloy,and the superhydrophobic and superdispersion surfaces were obtained after the surface is modified with fluorosilane ethanol solution.Superhydrophobic surfaces were prepared on aluminum alloy substrates by electrochemically etching and then storing in air.The experiments did not use low,surface-energy materials with toxic,hazardous and high cost as coatings to reduce the surface energy of the machined surfaces,which simplifying the process and improving the stability of the superhydrophobic surface in the air.