This work supplies the missing piece of the puzzle regarding the unclear relation between the water contact angle (WCA) of a superhydrophobic coating (SHC) and its corrosion protection performance. Generally, an increase in the WCA of a coating increases its corrosion protection behavior. However, in some cases it has been reported that an increase in the WCA, inexplicably, reduces its corrosion protection efficiency. This work uses measurements of the dielectric properties of a SHC to reveal the main reason behind a significant increase in the corrosion protection efficiency of a SHC when there are minor or no changes in the values of the measured WCA.

中文翻译：

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关于超疏水性程度与超疏水性涂料的耐蚀性之间关系的难题的缺失

这项工作提供了关于超疏水性涂层（SHC）的水接触角（WCA）和其腐蚀防护性能之间关系不清楚的难题的缺失部分。通常，涂层的WCA的增加会增加其腐蚀防护性能。然而，在某些情况下，据报道WCA的增加莫名其妙地降低了其腐蚀防护效率。这项工作使用SHC介电性能的测量结果来揭示，当所测WCA值变化很小或没有变化时，SHC腐蚀防护效率显着提高的主要原因。