Waterborne epoxy coating as well as preparation method and application thereof

The invention belongs to the technical field of corrosion prevention, and relates to a waterborne epoxy coating as well as a preparation method and application thereof. The epoxy coating comprises the following components in percentage by weight: 99.8% of epoxy resin and 0.2% of a nano-filler, wherein the nano-filler comprises the following components in percentage by weight: 20-40% of boron nitride, 55-75% of a ZIF-7 filler and 5% of a corrosion inhibitor. The two-dimensional nano-filler and the ZIF-7 filler responsive to pH values are added on the basis of traditional water-borne epoxy resin, so corrosion inhibition effect is obvious; and the preparation method is simple, safe, non-toxic and environmentally friendly. 本发明属于防腐蚀技术领域，涉及一种水性环氧涂层其制备方法与应用。所述环氧涂层中，照重量分数计，99.8％是环氧树脂，0.2％是纳米填料，其中纳米填料中，20-40％氮化硼，55-75％的ZIF-7填料，5％的缓蚀剂。在传统的水性环氧树脂的基础上添加二维纳米填料和对pH响应的ZIF-7填料，缓蚀效果明显，制备方法简单，安全无毒，环境友好。