Superhydrophobic surfaces on brass with controllable water adhesion

Superhydrophobic surfaces have aroused much attention because of their potential engineering applications. In this paper, a facile and quick method is reported to fabricate superhydrophobic surfaces with controllable water adhesion on brass. After alternating current (AC) etching in phosphoric acid solution for 0.5. min to 5. min, copper aggregates on the brass substrate with different micro-structures. After the modification with stearic acid, superhydrophobic surfaces are obtained. And the wettability of superhydrophobic surfaces can be controlled via varying the etching time. This facile and inexpensive technique provides a novel strategy to construct superhydrophobic surfaces with controllable wetting behaviors.