石墨烯改性环氧云铁中间漆的制备和性能研究

Preparation and Performance of Graphene-modified MIO Epoxy Intermediate Coatings

为了进一步提高环氧云铁中间漆的阻隔效果,解决其在高湿和夏天高热的水工环境中防护长效性不足的问题。将薄层石墨烯添加到环氧云铁中间漆中,利用二维纳米石墨烯比表面积大的特点,研究了石墨烯添加量对涂层附着力、耐冲击性、耐淡水性、耐盐水性和电化学性能的影响。结果表明:纳米级石墨烯和微米级云母氧化铁的片层结构相结合提供了微纳协同屏蔽的机理,添加微量石墨烯后明显提高了涂层的各项性能,尤其是耐水渗透性、耐冲击性和在水中浸泡后涂层的附着力,使得石墨烯改性环氧云铁中间漆对处于高湿高热应用环境的水工钢结构能够提供更有效、更耐久的腐蚀防护。

In order to further improve the barrier effect of epoxy micaceous iron oxide(MIO)intermediate coatings,and solve the problem of its insufficient long-term protection in the high humidity and summer high heat of the hydraulic environment.In this paper,the effects of the thin-layer graphene addition to epoxy MIO coatings on the adhesion,impact,salt spray and electrochemical properties were investigated.The results showed that the synergistic lamellar structure of nanoscale graphene and micrometer-scale muscovite iron provided a mechanism for micro-nano shielding property.After adding a small amount of graphene,the properties of the coating were significantly improved,especially the water permeability resistance,impact resistance and the adhesion of the coating after soaking in water,so that the graphene-modified epoxy MIO intermediate coatings could provide more effective and durable corrosion protection for steel structures in high-humidity and high-heat hydraulic application environments.