Mineral-fouling induced corrosion and deterioration of marine vessels, aircraft, and coastal structures is due in part from structural intrusion of crystals grown from ocean-generated saline drops. As such, much work has explored surface treatments that induce hydrophobicity or introduce barriers for antifouling and corrosion prevention; however, the efficacy of these strategies will be altered by the underlying substrate texture. Here, we study the behavior of evaporating saline drops on superhydrophobic and liquid-impregnated surfaces as a function of surface texture. On superhydrophobic surfaces, four disparate regimes (which are not observed for particle-laden drops) emerge as a function of the substrate solid fraction: Cassie-pinning, Cassie-gliding, Cassie–Wenzel transition, and Wenzel. These regimes control the morphology of the resultant crystal deposits. In contrast to the superhydrophobic surfaces, spreading liquid-impregnated surfaces demonstrate minimal influence of solid fraction on evaporative crystallization. The area, area localization, timescale of evaporation, and deposit morphology are all normalized by the presence of the lubricating layer, thus introducing an efficient method of eliminating crystal “coffee rings” as well as reducing the potential for fouling and corrosion.

中文翻译：

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在超疏水和液体浸渍表面上的液滴中的蒸发结晶

矿物污染引起的船舶，飞机和沿海结构的腐蚀和劣化部分归因于海洋产生的盐滴所产生的晶体的结构侵入。因此，许多工作都在探索可引起疏水性或引入防污和防腐蚀屏障的表面处理。然而，这些策略的功效将因底层的基材质地而改变。在这里，我们研究了超疏水性和液体浸渍表面上的盐滴蒸发行为与表面纹理的关系。在超疏水表面上，根据底物固形分出现了四个不同的状态（未观察到载有颗粒的液滴）：Cassie-pinning，Cassie-gliding，Cassie-Wenzel过渡和Wenzel。这些制度控制了所得晶体沉积物的形态。与超疏水表面相反，散布的液体浸渍表面显示出固体部分对蒸发结晶的影响最小。面积，面积局部化，蒸发时间尺度和沉积物形态均通过润滑层的存在进行了归一化，从而引入了一种有效的消除晶体“咖啡环”的方法，并减少了结垢和腐蚀的可能性。