Dual-Layer Anticorrosion Coating: Advanced Multifunctional Coating with Both Superhydrophobicity and pH-Responsive Behavior.

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-09-24 DOI:10.1021/acs.langmuir.5c03577

Lijuan Zhu,Chun Feng,Pengao Yu,Yuchi Guo,Zongxue Yu,Xiaofeng Bai,Yuji Li

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Abstract

This article prepared a multifunctional anticorrosion superhydrophobic dual-layer coating with pH-response behavior. By modification of ZIF-8 with low surface energy substance stearic acid, and then loading the corrosion inhibitor 2-amino-5-mercapto-1,3,4-thiadiazole (AMT), a superhydrophobic nanocontainer encapsulating the corrosion inhibitor was prepared. The first layer of the smart coating was applied by using a brushing technique, while the second layer of the superhydrophobic coating was achieved through a spraying method. This composite coating exhibits both pH-responsive behavior and superhydrophobic properties. An electrochemical impedance spectroscopy test was conducted by immersing the composite coating in a 3.5 wt % NaCl solution. The results indicated that the dual-layer superhydrophobic anticorrosion composite coating, designated as ZST/EP-S, maintained the highest low-frequency impedance value after 40 days of immersion, which was 4 orders of magnitude greater than that of pure EP and 1 order of magnitude higher than the smart anticorrosion coating ZST/EP. This demonstrates a significant enhancement in corrosion resistance for the dual-layer superhydrophobic anticorrosion composite coating. Scratch test and UV-vis light experiments verified the successful release of corrosion inhibitor AMT.

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双层防腐涂料：具有超疏水性和ph响应性能的先进多功能涂料。

本文制备了一种具有ph响应性能的多功能防腐超疏水双层涂层。采用低表面能物质硬脂酸对ZIF-8进行改性，然后将缓蚀剂2-氨基-5-巯基-1,3,4-噻二唑（AMT）负载到ZIF-8表面，制备了包裹该缓蚀剂的超疏水纳米容器。第一层智能涂层采用刷涂技术，第二层超疏水涂层采用喷涂技术。该复合涂层具有ph响应性能和超疏水性。将复合涂层浸泡在3.5 wt % NaCl溶液中，进行了电化学阻抗谱测试。结果表明，双层超疏水防腐复合涂层ZST/EP- s在浸泡40天后保持了最高的低频阻抗值，比纯EP高4个数量级，比智能防腐涂层ZST/EP高1个数量级。这表明双层超疏水防腐复合涂层的耐蚀性显著增强。划痕试验和紫外-可见光实验验证了缓蚀剂AMT的成功释放。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).