Fabrication of nano-structured super-hydrophobic film on aluminum by controllable immersing method

► Acetic acid, hydrochloric acid and oxalic acid as etching solution. ► Aluminum alloy plates were immersing in four different formula acid solutions for some hours at ambient temperature respectively. ► The surfaces were configured in a labyrinth structure with convexity and caves of micro-nanostructure. ► The surface had better faces and process stability by disposal of two acids immersing.