Method for preparing superhydrophobic surface of aluminum alloy through laser peening

A method for preparing a superhydrophobic surface of an aluminum alloy through laser peening, comprising the following steps:

• coating a surface of the aluminum alloy as an absorption layer with an organic component-containing confinement layer to obtain a coated aluminum alloy, wherein the organic component-containing confinement layer is a mixed organic solution comprising 5 mL to 10 mL of perfluorooctyltriethoxysilane, 100 mL to 200 mL of absolute ethanol, and 30 mL to 50 mL of distilled water;
• and subjecting a surface of the coated aluminum alloy to the laser peening to form the superhydrophobic surface, wherein due to a thermal effect of the laser peening and an ultra-high temperature and ultra-high pressure environment produced, the surface of the aluminum alloy reacts with an organic substance in the confinement layer, such that a low-free-energy functional group is bonded to the surface of the aluminum alloy to reduce a surface energy of the aluminum alloy, and a combined action of a resulting porous micro/nano structure and a reduced surface energy makes the surface of the aluminum alloy have a superhydrophobic effect.