A synergistic anti-corrosion system based on durable superhydrophobic F-SiO2/epoxy coatings and self-powered cathodic protection,Journal of Materials Chemistry A

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A synergistic anti-corrosion system based on durable superhydrophobic F-SiO2/epoxy coatings and self-powered cathodic protection
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-08-01 , DOI: 10.1039/d2ta05071d
Xiukun Liu ₁ , Xu Xu ₁ , Fangjia Zhang ₂ , Xiangchao Ge ₂ , Haifeng Ji ₂ , Yuqi Li ₁ , Shaorong Lu ₁ , Zhen Wen ₂

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A sustainable, reliable and self-powered anti-corrosion method for metallic structures is key to improving the operation stability and service life of equipment. In this work, a series of durable superhydrophobic fluorinated silica (F-SiO₂)/epoxy resin (FE) coatings with good corrosion resistance were prepared via a simple spraying method, which were further used to fabricate a FE based triboelectric nanogenerator (FE-TENG). A synergistic anti-corrosion system for self-powered cathodic protection constructed using the superhydrophobic FE coating and a water wave-driven FE-TENG was then proposed. In a 3.5 wt% NaCl solution, the corrosion potential (E_corr) of an aluminum (Al) sheet protected by the FE-TENG self-powered cathodic protection was slightly decreased by 80 mV. However, when the Al sheet was coated with a FE superhydrophobic coating, the E_corr was significantly reduced by 460 mV under FE-TENG protection. Notably, the E_corr of 304 stainless steel protected by the synergistic anti-corrosion system was dramatically decreased by ∼745 mV. Furthermore, an application in marine corrosion protection was demonstrated by using a float-like spherical FE-TENG. This work demonstrates a cost-effective and large-scale strategy for preparing a superhydrophobic FE coating, using which a self-powered synergistic anti-corrosion system is built for effectively protecting metals from corrosion.

中文翻译：

基于耐用超疏水 F-SiO2/环氧树脂涂层和自供电阴极保护的协同防腐系统

可持续、可靠、自供电的金属结构防腐方法是提高设备运行稳定性和使用寿命的关键。在这项工作中，通过简单的喷涂方法制备了一系列耐腐蚀的超疏水氟化二氧化硅（F-SiO ₂）/环氧树脂（FE）涂层，并进一步用于制备基于FE的摩擦纳米发电机（FE-腾）。然后提出了一种使用超疏水FE涂层和水波驱动的FE-TENG构建的自供电阴极保护的协同防腐系统。在 3.5 wt% NaCl 溶液中，腐蚀电位 ( E _corr) 由 FE-TENG 自供电阴极保护保护的铝 (Al) 板的电压略微降低了 80 mV。然而，当 Al 片材涂有 FE 超疏水涂层时，在 FE-TENG 保护下，E _corr显着降低了 460 mV。值得注意的是，由协同防腐系统保护的 304 不锈钢的E _{corr显着降低了约 745 mV。}此外，还展示了使用浮球状球形 FE-TENG 在海洋腐蚀防护中的应用。这项工作展示了一种制备超疏水 FE 涂层的成本效益和大规模策略，使用该涂层构建自供电协同防腐系统以有效保护金属免受腐蚀。

更新日期：2022-08-01

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