Graphene-modified anticorrosion coatings have become a hot spot in the field of metal protection due to the large-scale promotion of aluminum alloys, which are prone to corrosion in marine and atmospheric environments. The protection of aluminum alloy surfaces by a graphene-modified anticorrosive coating was explored in this study by applying a graphene-modified anticorrosive coating to an aluminum alloy surface to test its resistance to corrosion. Dispersion-treated reduced graphene oxide (rGO) was used to modify the epoxy resin and fluorocarbon resin. It was found, by using a scanning electron microscopy (SEM) and the microstructure of the coating made by the Raman Spectroscopy Institute, that the addition of rGO could effectively improve the porosity of the epoxy primer, and the electrochemical workstation was able to resist the graphene-modified anticorrosive coating. The corrosion performance was quickly characterized, the polarization curve and the AC impedance curve were fitted, and it was found that the self-corrosion current density ( ) of the graphene-modified anticorrosive coating was the smallest ( ) when 0.6% of rGO was added; the impedance modulus ( ) was the largest (104), the capacitive reactance arc radius was the largest, and the coating resistance was the largest after fitting (15517 Ω). When 0.8% of rGO was added, the dispersion coefficient was large, and it had a good physical insulation performance. The main reason for the reduction of the corrosion resistance was that the agglomeration of rGO made the aluminum alloy matrix and the external corrosive environment form a highly conductive circuit, thereby accelerating the corrosion of the aluminum alloy matrix.

中文翻译：

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石墨烯改性氟碳防腐涂层对铝合金表面保护的研究

由于在海洋和大气环境中容易腐蚀的铝合金的大规模推广，石墨烯改性防腐涂料已成为金属保护领域的热点。本研究通过将石墨烯改性防腐涂层应用于铝合金表面以测试其耐腐蚀性，探索了石墨烯改性防腐涂层对铝合金表面的保护。分散处理的还原氧化石墨烯（rGO）用于改性环氧树脂和氟碳树脂。通过扫描电子显微镜（SEM）和拉曼光谱研究所制备的涂层微观结构发现，rGO的加入可以有效提高环氧底漆的孔隙率，并且电化学工作站能够抵抗石墨烯改性的防腐涂层。快速表征腐蚀性能，拟合极化曲线和交流阻抗曲线，发现添加0.6%的rGO时，石墨烯改性防腐涂层的自腐蚀电流密度( )最小( ) ; 阻抗模量( )最大(104)，容抗弧半径最大，拟合后涂层电阻最大(15517 Ω)。当加入0.8%的rGO时，分散系数大，具有良好的物理绝缘性能。耐蚀性降低的主要原因是rGO的团聚使铝合金基体与外部腐蚀环境形成高导电电路，