Preparation method of graphene/basalt heat conduction metal corrosion-resistant coating material

Abstract

The invention relates to the technical field of coating materials, and discloses a preparation method of a graphene / basalt heat conduction metal corrosion-resistant coating material. The preparation method comprises the following steps: 1) adding bisphenol A epoxy resin and graphene / basalt composite powder into an acetone aqueous solution, stirring, adding nano titanium dioxide and a silane coupling agent, continuously stirring, adding an antifoaming agent and an emulsifier, and continuously stirring until slurry is completely dispersed, thus obtaining a component A; 2) adding a curing agent and an ultraviolet absorber to ethyl acetate, stirring and uniformly mixing to obtain a component B; 3) mixing the component A and the component B, and uniformly stirring to obtain the graphene / basaltheat conduction corrosion-resistant coating material. The coating material prepared by the method not only can effectively resist the corrosion of chloride ions in seawater to a metal matrix of a hull, but also has better heat conduction and dissipation effects, and avoids adverse effects on the hull per se and a coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a graphene / basalt heat-conducting anti-metal corrosion coating. Background technique [0002] Seawater is an electrolyte solution containing a variety of salts. The main salt is 3-3.5% sodium chloride. The radius of chloride ions is small, and the diffusion is difficult to be hindered. When it moves to the metal surface, it can be adsorbed on the metal surface. Chlorine The ions themselves have certain complexation properties. After being adsorbed on the surface of iron, due to their high activity, they can react with the passivation film or iron on the microscopic level. When there is a defect in the passivation film, there will be fresh At this time, the metal part is a large primary battery, and the exposed metal part of the gap becomes an activated anode area, while the other unexposed area is a large cathode area, thus forming a so-called large catho...

AI Technical Summary

Problems solved by technology

In the above patented technical scheme, the paint coating can prevent oxygen and water from entering the paint to achieve the purpose of imitating electrochemical corrosion, but a large number of chloride ions with smaller particle sizes in seawater will penetrate into the substrate from the tiny gaps between the paint layers, thereby damaging Ships cause salt solution corrosion. In addition, the coating on the hull will cause the heat dissipation of the hull to deteriorate, resulting in excessive local temperature of the hull, which will accelerate the thermal aging and decomposition of the coating.