Surfactant-added composite modified anti-corrosion zinc-rich coating and preparation method thereof

Abstract

The invention provides a surfactant-added composite modified anti-corrosion zinc-rich coating. The coating comprises, by weight, 20-40 parts of epoxy resin, 10-30 parts of polyamide, 5-10 parts of a curing agent, 5-15 parts of a leveling agent, 0.5-1 part of a toughening agent, 0.1-0.5 part of a degassing agent, 0.1-0.6 part of a flow promoter, 5-15 parts of a potassium silicate solution, 20-50 parts of zinc powder and 5-20 parts of a filler. A preparation method of the composite modified anti-corrosion zinc-rich coating comprises the following steps: weighing the components in parts by weight; heating and stirring epoxy resin and polyamide to obtain a first mixed solution; pouring the curing agent, the leveling agent, the toughening agent, the degassing agent and the flow promoter into the first mixed solution, and heating and stirring to obtain a second mixed solution; and finally, adding the potassium silicate solution, the zinc powder and the filler into the second mixed solution, stirring at a high speed to obtain a third mixed solution, and cooling to obtain the composite modified anti-corrosion zinc-rich coating. The mechanical property and the corrosion resistance of the composite modified anti-corrosion zinc-rich coating are improved, and the surface drying time of the coating is shortened by 20%.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, and in particular to a composite modified anti-corrosion zinc-rich coating added with a surfactant and a preparation method thereof. Background technique [0002] Anti-corrosion coatings, generally divided into conventional anti-corrosion coatings and heavy-duty anti-corrosion coatings, are an indispensable coating in paint coatings. Conventional anti-corrosion coatings can prevent corrosion of metals under normal conditions, thereby protecting the service life of non-ferrous metals. Heavy-duty anti-corrosion coatings refer to a type of anti-corrosion coatings that can be applied in relatively harsh corrosive environments and have a longer protection period than conventional anti-corrosion coatings. Anti-corrosion coatings have become an important new force in the field of coatings because they can be used under harsh conditions and have a long anti-corrosion life. They are playi...

AI Technical Summary

Problems solved by technology

The existing water-based inorganic anti-corrosion coatings often use zinc powder as an antibacterial agent, but due to the high activity of zinc powder, poor sedimentation resistance and easy agglomeration, the corrosion resistance, sedimentation resistance and dispersibility of zinc powder itself in the coating are reduced , leading to short shelf life of coating products, rapid coating failure, difficult coating construction, uneven paint film and limited application of flake zinc powder