锌粉接枝离子液体对环氧涂料防腐性能的影响

Effect of Zinc Powder Grafted Ionic Liquid on Anticorrosive Properties of Epoxy Coatings

针对石墨烯在富锌防腐涂料中应用时易团聚的问题,采用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)对1-(2-氨乙基)-3-甲基咪唑溴离子液体进行改性,并将改性离子液体接枝在锌粉表面用以制备石墨烯环氧富锌防腐涂料,通过红外、热重、核磁对改性后的离子液体进行表征,采用电化学极化曲线和电化学阻抗谱对涂料的性能进行分析。结果表明:该分散方法制备的涂料的腐蚀电位可达-0.858V,腐蚀电流密度为1.622×10^(-6)A/cm^(2)。该分散方法制备的40%锌含量的石墨烯防腐涂料的防腐性能与80%锌含量的防腐性能相当,且其耐酸性、耐碱性均优于80%锌含量富锌底漆的性能。

Graphene was easy to agglomerate in zinc rich anti-corrosion coatings,which was not conducive to the improvement of anti-corrosion performance. In this paper,1-(2-aminoethyl)-3-methylimidazole bromide ionic liquid was modified by γ-Glycidyl ether oxypropyl trimethoxysilane(KH560)and grafted onto the surface of zinc to prepare epoxy anticorrosive coatings. The modified ionic liquid was characterized by FT-IR,TGA and1H NMR. The properties of the anti-corrosion coatings were characterized by electrochemical polarization curve and electrochemical impedance spectroscopy. The results showed that the corrosion potential of the coatings could reach-0. 858 V and the corrosion current density was1. 622×10;A/cm;. The anticorrosive properties of 40% zinc content graphene anticorrosive coatings prepared by the dispersion method were equivalent to that of 80% zinc content anticorrosive coatings,and the acid and alkali resistances were better than that of 80% zinc content zinc rich primer.