Abstract
Superhydrophobic surface have many applications such as drag reduction in the micro-electromechanical systems. A novel method of fabricating superhydrophobic surface is proposed using the simple wet chemical etching in this paper. Firstly, the surface of steel disc is polished by abrasive paper and then treated with chemical etching. Secondly, the surface of steel is modified with 1H,1H,2H,2H-Perfluorooctyltrimethoxysilane. The superhydrophobic surface was obtained on the stainless steel surface. Finally, the effects of the etching time and etching solution concentration were analyzed to the superhydrophobic performance. The experimentation results show that superhydrophobic performance is the best when the HCl concentration is 2mol/L, the etching time is 20 minute respectively. The water contact angle (CA) of the rotor surface is 152°. The water droplets are hardly able to stick to the steel surface．
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