Preparation method of anti-corrosion coating for steel

Abstract

The invention discloses a preparation method of an anti-corrosion coating for steel. The anti-corrosion coating contains multiple compound fillers such as modified shell powder and modified graphene oxide. The anti-corrosion coating is uniformly stirred and is dispersed into a coating system; by utilizing aluminum tripolyphosphate, an iron tripolyphosphate passivation protecting film can be formed, so that the further inward dispersion of corrosion particles is blocked; a grid laminated structure of graphene oxide is distributed in a coating layer, so that micro-pores in the surface of the coating layer can be filled up, the penetration of corrosion particles into the coating layer is blocked, relatively compact protection for a base material is realized, and the base material can bear a relatively strong structural stress; meanwhile, the conjugative effect among modified graphene oxide is reduced, and then shell powder with a porous fiber-shaped double-spirochete structure is inserted, so that the agglomeration and accumulation of a graphene structure layer are effectively prevented, and the integral corrosion resistance of the coating layer is improved; and meanwhile, the preparation method of the coating is simple, the raw materials are easily available, and the coating has ideal corrosion-prevention and protection performance to the steel and has remarkable effects to the protection of the steel.

Description

technical field [0001] The invention relates to the technical field of paint materials, in particular to a preparation method of steel anticorrosion paint. Background technique [0002] The structural materials supporting modern buildings are mainly steel bars, concrete and glass. Due to its high strength, stable performance, good toughness and suitability for mass production, steel has become the best building structure material. In recent years, steel structure housing has become the mainstream building in developed countries, and steel structure buildings are used in factories, buildings, bridges, and large public projects in some advanced cities. However, the most worrying thing is the corrosion of steel structure buildings. The strength of the steel after corrosion is reduced, which has become a serious safety hazard. Therefore, in addition to improving the steel itself and using weather-resistant steel plates, it is also necessary to strengthen the anti-corrosion mea...

AI Technical Summary

Problems solved by technology

However, the conjugation effect between graphene makes graphene easy to agglomerate, poor dispersion in water-based system, there are gaps in the microstructure of the coating after curing, water molecules and ions are easily permeable, and there are no active groups on the surface of graphene , it is difficult to modify it, but the oxidized graphene contains more hydrophilic groups, without chemical modification, the anti-corrosion effect is not ideal when used alone