Fast Fabrication of Super-hydrophobic Brass Surface Using Solution Immersion Method

Abstract

Abstract:

A chemical etching method combined with solution immersion was developed to fabricate super-hydrophobic brass surface. HCl, HNO3 and HF were mixed according to a certain percentages in the solution to etch brass which was treated with stearic acid. Inspected with scanning electron microscope, the etched surface morphology was found formed with double scales of hierarchical sheeted and papillary structures which could store lots of air. According to Cassie function, about 94.11% of the contact proportion is between water and air cushion. This research studied the effect of different etching time and analyzed the formation mechanism of these nano-structures. The best fabrication conditions were: 5 min of etching time and 1h of immersion time, which made the surface to have a WCA of 164.5°.

Key words: chemical etching, super-hydrophobic, stearic acid, microstructure

CLC Number:

TB 43

HU Haibao，CHEN Libin，HUANG Suhe. Fast Fabrication of Super-hydrophobic Brass Surface Using Solution Immersion Method[J]. Journal of Shanghai Jiaotong University, 2013, 47(08): 1271-1274.

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