A kind of anticorrosion coating based on graphene modification and its preparation process

Abstract

The invention discloses graphene-modified anticorrosive paint, which comprises the following components in parts by weight: 34 to 36 parts of graphene-based acrylic resin, 12 to 14 parts of epoxy resin, 1.2 to 1.4 parts of tetraethyl orthosilicate, 1.3 to 1.4 parts of lauroyl diethanolamide, 3 to 4 parts of a volatile corrosion inhibitor, 2.2 to 2.5 parts of a defoaming agent, 45 to 56 parts of ethanol, 5 to 7 parts of polyamide and 3 to 4 parts of water, wherein the epoxy resin is bisphenol-A epoxy resin. According to the graphene-modified anticorrosive paint, with the epoxy resin and the graphene-based acrylic resin as matrix, the two types of resins are connected to form a large reticular structure, and the volatile corrosion inhibitor is wrapped in the reticular structure; when the paint is applied on the surface of steel, a coating layer is formed, the volatile corrosion inhibitor is sublimed in the reticular framework, the meshes of the epoxy resin and the graphene-based acrylicresin in the coating layer are filled up with the sublimed gas, so that the coating layer is fully sealed without gaps, consequently, the steel can be effectively prevented from being in contact withthe air, and thereby the corrosion resistance of the steel can be increased.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a graphene-based anticorrosion coating and a preparation process thereof. Background technique [0002] In the fields of ships, bridges, marine facilities and large-scale construction equipment, steel is mostly used as the base material. Since steel is easily oxidized and corroded in the air, the strength and hardness of the steel will change. Therefore, the existing large-scale equipment , usually use anti-corrosion paint to coat the steel to achieve the anti-corrosion performance of the steel. [0003] Most of the existing anti-corrosion coatings cathodically protect steel by adding zinc powder, but when the content of zinc powder is high, the paint film will have poor compactness and low strength. Therefore, in order to improve the performance of anti-corrosion coatings, in the prior art, directly add Graphene oxide, because graphene can be well dispersed in the coating, and at the same...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of anticorrosion paint based on graphene modification and preparation technology thereof, this paint is base with epoxy resin and graphene-based acrylic resin, two kinds of resins are connected into a large network structure, and the gas phase retardation The corrosion agent is wrapped in the network structure. When the paint is coated on the steel surface, a coating is formed. The gas phase corrosion inhibitor sublimates in the network skeleton, and the gas generated by sublimation fills the epoxy resin and graphene base in the coating. In the network voids of the acrylic resin, the coating is completely sealed without gaps. At the same time, due to the layer-by-layer connection of the graphene-based acrylic resin, the resins in the entire coating are interlaced, and there are no gaps in the coating, thus making The air cannot enter the coating, which can effectively prevent the steel from being in contact with the air, thereby improving the anti-corrosion ability of the steel, and solving the problem of directly adding graphene to the coating in the prior art, and the graphene cannot be completely distributed in the special layer after mixing Surface, completely cover the coating, so that the coating still has the problem of corrosion points

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