BIONIC SANDWICH CORROSION-RESISTANT COATING, PREPARATION METHOD THEREFOR, AND USE THEREOF

摘要

Disclosed are a bionic sandwich corrosion-resistant coating, a preparation method therefor, and the use thereof. The bionic sandwich corrosion-resistant coating comprises at least two waterborne layers coated on the surface of a substrate, wherein at least one graphene barrier layer is distributed between two adjacent waterborne layers. The graphene barrier layer comprises a dopamine-functionalized graphene material having a lamellar structure, and the dopamine-functionalized graphene material is arranged in parallel to the surface of the substrate. The preparation method comprises: using an electrophoresis deposition technique and cyclic voltammetry to sequentially deposit a waterborne layer, a graphene barrier layer and a waterborne layer on the surface of a substrate. Due to hydrogen bonding and electrostatic interactions, the graphene material is arranged in parallel between two waterborne resin layers, such that not only can the diffusion path of a corrosive medium be efficiently prolonged, but the barrier effect of graphene can also be brought into full play, and same approaches the barrier limit. In addition, the preparation method is simple, the cost is low, and the amount of pollution produced is small.