Abstract Limited durability, poor anti-corrosion property and complex synthesis procedure are the major obstacles to the practical application of superhydrophobic coatings, especially for room-temperature curing superhydrophobic coatings. To address these problems, a versatile superhydrophobic coating embedding with carbon nanotubes and silica nanoparticles was fabricated in this work via facile spraying and ambient curing technique, utilizing epoxy resin as film-forming material. With the surface modification of 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS), the prepared surface demonstrated an excellent superhydrophobicity with a water contact angle (WCA) of 164 ± 1.5° and a sliding angle (SA) of 4 ± 0.5°. The inorganic particle and the organic resin together constructed a unique bistratal structure consisting of superficial protrusions and underlying porous structures. The mechanical property of the coating was improved by their synergistic effect. Furthermore, the underlying porous structures could capture more air to form a stable air layer, which enhanced the self-cleaning property and durability of the superhydrophobic coating. Especially, the fabricated coating exhibited outstanding corrosion resistance, the corrosion current density of the coating was about 2.37 × 10−11 A/cm2, which was 2 and 4 orders of magnitude lower than that of the EP coating and the pure Al plate, respectively. Based on the electrochemical analysis, the anti-corrosion mechanism involving physical barrier and electrons transfer was proposed. The facile, economical method for preparing superhydrophobic coating has enormous application value in various fields.

中文翻译：

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常温固化制备的双层结构耐用防腐超疏水涂层

摘要 耐久性有限、防腐性能差和合成工艺复杂是超疏水涂层实际应用的主要障碍，尤其是室温固化超疏水涂层。为了解决这些问题，在这项工作中，利用环氧树脂作为成膜材料，通过简单的喷涂和环境固化技术制造了一种嵌入碳纳米管和二氧化硅纳米粒子的多功能超疏水涂层。通过 1H,1H,2H,2H-全氟辛基三乙氧基硅烷 (POTS) 的表面改性，制备的表面表现出优异的超疏水性，水接触角 (WCA) 为 164 ± 1.5°，滑动角 (SA) 为 4 ± 0.5° . 无机颗粒和有机树脂共同构成了独特的双层结构，由表面突起和底层多孔结构组成。它们的协同作用提高了涂层的机械性能。此外，下面的多孔结构可以捕获更多的空气以形成稳定的空气层，从而增强了超疏水涂层的自清洁性能和耐久性。特别是制备的涂层表现出优异的耐腐蚀性能，涂层的腐蚀电流密度约为2.37×10-11 A/cm2，分别比EP涂层和纯Al板低2个和4个数量级. 在电化学分析的基础上，提出了物理屏障和电子转移的防腐机理。轻而易举，