Effect of DBSA-doped PANI on the corrosion protection performance of GO/epoxy coatings

IF 1.6 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2024-05-18 DOI:10.1002/maco.202414308

Xiaoling Liu, Yingjun Zhang, Chao Shi, Baojie Dou, Mingshun Liu

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Abstract

In this study, the anticorrosion effect of polyaniline doped with dodecyl benzene sulfonic acid (PANI-DBSA) in graphene oxide (GO)/epoxy coating is investigated. PANI-DBSA is effectively synthesized on the surface of GO via chemical polymerization, and its properties are investigated via a series of characterization methods. The PANI-DBSA/GO hybrid exhibits improved compatibility with organic resin. The anticorrosion performance of PANI-DBSA/GO coatings is assessed through water absorption tests, electrochemical impedance spectroscopy measurements, and adhesion strength tests. The results indicate that PANI reduces the water absorption of GO, and the favorable compatibility of PANI-DBSA/GO with epoxy resin minimizes coating defects and enhances the interfacial blocking for diffusion electrolytes. In this work, the PANI has no active function such as passivating the metal surface, it just serves to shield the hydrophilic GO surface and to improve compatibility between GO and the epoxy, attributing its low pigment content.

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掺杂 DBSA 的 PANI 对 GO/epoxy 涂层腐蚀防护性能的影响

本研究探讨了掺杂十二烷基苯磺酸的聚苯胺（PANI-DBSA）在氧化石墨烯（GO）/环氧涂层中的防腐效果。PANI-DBSA 通过化学聚合反应被有效地合成在 GO 表面，并通过一系列表征方法研究了其特性。PANI-DBSA/GO 混合物与有机树脂的相容性得到了改善。PANI-DBSA/GO 涂层的防腐性能通过吸水测试、电化学阻抗光谱测量和附着强度测试进行了评估。结果表明，PANI 可降低 GO 的吸水性，PANI-DBSA/GO 与环氧树脂的良好相容性可最大限度地减少涂层缺陷，并增强对扩散电解质的界面阻隔。在这项工作中，PANI 并不具有钝化金属表面等活性功能，它只是起到保护亲水性 GO 表面和提高 GO 与环氧树脂相容性的作用，这要归功于其较低的颜料含量。

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来源期刊

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.