Epoxy anti-corrosive paint used for underwater concrete

Abstract

The invention discloses epoxy anti-corrosive paint used for underwater concrete. Liquid epoxy resin DER351 is used as a base material; polysulfide rubber is used as a flexibilizer; pentanediol diglycidyl ether 6286 is used as a diluent; zinc phosphate and iron oxide red are used as active anti-corrosive pigment; spherical silicon carbide, ceramic microspheres, mica iron oxide, sericite and precipitate vitriolic barium are used as fillings; cashew shell oil, modified phenolic aldehyde amine and modified aliphatic amine are used as curing agents; and a silane coupling agent 1121 is used as an adhesion promoter. With the cooperation of functional promoters, the raw materials are made into solvent-free double-component epoxy anti-corrosive paint used for underwater concrete through conventional preparation technique equipment. The epoxy anti-corrosive paint used for underwater concrete is highly environmental-friendly and can be directly painted or smeared on damp interfaces of underwater concrete and rapidly solidified into films; the coating has great adhesion and strong abrasion resistance and corrosion prevention. The epoxy anti-corrosive paint used for underwater concrete is widely applied to the corrosion prevention of various underwater concrete facilities.

Description

Technical field [0001] The invention relates to the technical field of reinforced concrete anticorrosion coatings, in particular to an epoxy anticorrosion coating for underwater concrete. Background technique [0002] Today, with the rapid development of my country's economic construction, infrastructure construction is extensive, involving various fields, such as port wharfs with reinforced concrete structures, bridge piers, wind power tower bases and other facilities. The splash area is subjected to erosion and corrosion by seawater and marine organisms, which damages the original anti-corrosion protective coating on the structure; , tunnels, etc., due to the perennial underwater or humid environment, the reinforced concrete structure has been subjected to waves or water impacts, corrosion, and wear all the year round, causing the original protective layer to be damaged. An anti-corrosion coating that cures to form a film at a wet interface under water. At present, anti-cor...

AI Technical Summary

Problems solved by technology

At present, anti-corrosion coatings for underwater and wet interfaces mainly include three systems: polyester resin system, vinyl resin system and epoxy resin system; the coating formed by the polyester resin system is thin and soft, and is easily damaged; the vinyl resin system needs to add solvents , not conducive to construction, incomplete curing in water, and poor environmental protection; the ring-opening reaction of epoxy resin is less affected by water, and epoxy resin molecules contain a large number of polar groups, which are easier to replace water molecules on the surface of the coated object. Good adhesion to various substrates, and low volume shrinkage of the cured product. Epoxy resin has the characteristics of good mechanical properties, high bonding strength, and excellent comprehensive performance. It is suitable for application in the field of anti-corrosion coatings

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