Abstract A simple, efficient and low-cost method is proposed to prepare surfaces with reversible superwettability and excellent corrosion resistance. Superhydrophobic surfaces are successfully obtained on the copper alloys by etching, heat treatment, and then stearic acid modification, exhibiting extraordinary water repellence with a static contact angle of 159.7 ± 1.2°, and a sliding angle of 3.1 ± 0.6°. The reversible transition of the superwetting state are successfully achieved. The surface can be turned into a superhydrophilic state by simple heat treatment. And then, it can be turned into a superhydrophobic state by re-modification. Meanwhile, the effects of etching time and heat treatment temperature on wettability are also studied. Finally, the corrosion resistance of the copper alloys and the durability under various extreme conditions are investigated. The results show that the prepared superhydrophobic copper alloys have excellent corrosion resistance with a corrosion inhibition rate of 98.83% and superior durability, which will further expand its practical applications.

中文翻译：

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可逆超润湿行为及其耐蚀性研究

摘要 提出了一种简单、高效、低成本的方法来制备具有可逆超润湿性和优异耐腐蚀性的表面。通过蚀刻、热处理和硬脂酸改性成功地在铜合金上获得超疏水表面，表现出非凡的防水性，静态接触角为 159.7±1.2°，滑动角为 3.1±0.6°。成功实现了超润湿状态的可逆转变。表面可以通过简单的热处理变成超亲水状态。然后，它可以通过重新修饰变成超疏水状态。同时，还研究了蚀刻时间和热处理温度对润湿性的影响。最后，研究了铜合金的耐腐蚀性和在各种极端条件下的耐久性。结果表明，所制备的超疏水铜合金具有优异的耐腐蚀性能，缓蚀率为98.83%，耐久性优异，将进一步拓展其实际应用。