采用简单的化学刻蚀方法制备出铝合金基体上的超疏水表面，刻蚀后的铝合金薄膜表面经高锰酸钾溶液浸润氧化后，再通过具低表面能的硬脂酸修饰而具有了超疏水性能。通过对刻蚀后的铝合金表面进行扫描电镜分析可知，合金表面具有微纳米结构，该结构对超疏水性能的产生起关键作用。研究了不同酸刻蚀时间及刻蚀酸浓度对铝合金表面疏水效果的影响，并确定了酸刻蚀法制备超疏水铝合金表面的最佳制备条件。即先将样条以等体积的O．08mol／L草酸与1mol／L盐酸混合溶液刻蚀15h，再用0．1mol／L的高锰酸钾溶液浸泡lh，最后以1％硬脂酸乙醇溶液浸泡30min。此条件下，水滴与合金表面的接触角达166°。%By simple chemical etching method, prepared aluminium alloy substrate surface of hydrophobic membranes.After infiltration oxidation by potassium permanganate solution and treatment with stearic acid of low surface energy, the etching aluminium surface has the properties of super-hydrophobic. SEM analysis of the aluminium alloy surface shows that the surface develops the micro-nano structure, which played a key role to the super-hydrophobic properties. In the experiments, studies the effects of different kinds of acid, different etching time and different etching concentration on the hydrophobic membranes. The best preparation conditions are： mixed solution of 0.08 mol/L oxalic acid and 1 mol/L hydrochloric acid etching for 15h, then 0.1 mol/L of potassium permanganate solution soaking for lh, finally 1% stearic acid ethanol solution soaking for 30min, meanwhile the contact angle of water droplets with the surface up to 166°
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