Abstract The present study investigated the anticorrosion performance of epoxy coating by the incorporation of two different functionalized graphene oxides as nanofillers in saline media. GO was functionalized with 2-Aminothiazole (AT) and 2-amino-4-(1-Naphthyl)Thiazole (ANT) and modified compounds were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Raman spectroscopy, and Scanning electron microscopy (SEM). 0.2 wt% of neat epoxy and epoxy nanocomposites (GO-AT/EP and GO-ANT/EP) were coated on mild steel substrate by a spin coating method and the formation of a protective film on the steel surface was confirmed using SEM, Atomic Force Microscopy (AFM) and contact angle test. The electrochemical impedance spectroscopy was employed to study the corrosion protection properties of nanocomposite coatings in 3.5% NaCl medium. The results signify the better anticorrosion performance of nanocomposite coatings due to their two-dimensional sheet structures, uniform dispersion and exfoliation in the epoxy matrix, hydrophobic nature and stopping up tiny pores properties. The GO-ANT/EP coating exhibited higher coating resistance (6.598 × 107 Ω cm2) than GO-AT/EP (1.017 × 105 Ω cm2) and pure epoxy (1270 Ω cm2) coating. The crowded structure of GO-ANT helps in forming highly crosslinked compact epoxy coating and therefore displays excellent corrosion protection efficiency than other coatings.

中文翻译：

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氧化石墨烯基纳米填料的合成及其对环氧涂层在盐水介质中防腐性能的影响

摘要 本研究通过在盐水介质中加入两种不同的功能化氧化石墨烯作为纳米填料来研究环氧涂层的防腐性能。GO 用 2-氨基噻唑 (AT) 和 2-氨基-4-(1-萘基)噻唑 (ANT) 进行功能化，并通过 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FT-IR)、热重分析 (TGA)、拉曼光谱和扫描电子显微镜 (SEM)。通过旋涂法将 0.2 wt% 的纯环氧树脂和环氧树脂纳米复合材料（GO-AT/EP 和 GO-ANT/EP）涂覆在低碳钢基材上，并使用 SEM、Atomic 确认在钢表面形成保护膜力显微镜 (AFM) 和接触角测试。采用电化学阻抗谱研究了纳米复合涂层在 3.5% NaCl 介质中的腐蚀防护性能。结果表明，纳米复合涂层由于其二维片状结构、在环氧树脂基体中的均匀分散和剥离、疏水性和堵塞微孔的特性，具有更好的防腐性能。GO-ANT/EP 涂层表现出比 GO-AT/EP (1.017 × 105 Ω cm2) 和纯环氧树脂 (1270 Ω cm2) 涂层更高的涂层电阻 (6.598 × 107 Ω cm2)。GO-ANT 的拥挤结构有助于形成高度交联的致密环氧涂层，因此比其他涂层表现出优异的防腐蚀效率。结果表明，纳米复合涂层由于其二维片状结构、在环氧树脂基体中的均匀分散和剥离、疏水性和堵塞微孔的特性，具有更好的防腐性能。GO-ANT/EP 涂层表现出比 GO-AT/EP (1.017 × 105 Ω cm2) 和纯环氧树脂 (1270 Ω cm2) 涂层更高的涂层电阻 (6.598 × 107 Ω cm2)。GO-ANT 的拥挤结构有助于形成高度交联的致密环氧涂层，因此比其他涂层表现出优异的防腐蚀效率。结果表明，纳米复合涂层由于其二维片状结构、在环氧树脂基体中的均匀分散和剥离、疏水性和堵塞微孔的特性，具有更好的防腐性能。GO-ANT/EP 涂层表现出比 GO-AT/EP (1.017 × 105 Ω cm2) 和纯环氧树脂 (1270 Ω cm2) 涂层更高的涂层电阻 (6.598 × 107 Ω cm2)。GO-ANT 的拥挤结构有助于形成高度交联的致密环氧涂层，因此比其他涂层表现出优异的防腐蚀效率。017 × 105 Ω cm2) 和纯环氧树脂 (1270 Ω cm2) 涂层。GO-ANT 的拥挤结构有助于形成高度交联的致密环氧涂层，因此比其他涂层表现出优异的防腐蚀效率。017 × 105 Ω cm2) 和纯环氧树脂 (1270 Ω cm2) 涂层。GO-ANT 的拥挤结构有助于形成高度交联的致密环氧涂层，因此比其他涂层表现出优异的防腐蚀效率。