氧化石墨烯/环氧树脂复合防腐涂层的制备及电化学性能研究

Preparation and Electrochemical Properties of Graphene Oxide/ Epoxy Resin Composite Anticorrosion Coating

  • 摘要: 采用四氢呋喃(THF)作为分散剂,2-甲基咪唑作为催化型固化剂,共混成氧化石墨烯(GO)分散体系。将其混入有机硅改性环氧树脂,得到新型防腐涂料。通过测试开路电位(OCP)和塔菲尔曲线(Tafel)来分析涂层的防腐蚀性能。结果显示,复合涂料与单一的环氧树脂涂料相比,表现出了较好的防腐蚀性能,且加入氧化石墨烯并不只增加了涂料的物理阻隔性,还使腐蚀环境发生了变化。在几种环氧树脂涂层中,综合来看,加入氧化石墨烯质量分数为5%的环氧树脂涂层,腐蚀电流较小,腐蚀电位最高,防腐性能最好。

     

    Abstract: Tetrahydrofuran(THF) as dispersant and 2-methylimidazole as catalyst curing agent were mixed into graphene oxide(GO) dispersion system, which then was blended into silicone modified epoxy resin to obtain new anticorrosion coating. The corrosion resistance of the coating was analyzed by open circuit potential(OCP) and Tafel curve. The results show that the compund coatings containing graphene oxide present better corrosion resistance than epoxy resin coatings, and the addition of graphene oxide not only promotes the barrier of the coatings, but also changes the corrosion environment. Among several kinds of epoxy resin coatings, the epoxy resin coatings with 5%(w) graphite oxide have the best corrosion resistance, with lower corrosion current and the highest corrosion potential.

     

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