Epoxy anticorrosive paint for underwater steel

Abstract

The invention discloses epoxy anticorrosive paint for underwater steel. Liquid epoxy resin DER351 is used as base materials, liquid polysulfide rubber JLY-121 is used as toughening agent, pentanediol glycidyl ether 6286 is used as diluents, aluminum tripolyphosphate, zinc phosphate and iron oxide red are used as active rustproofing pigment, micaceous iron oxide, sericite and precipitated barium sulphate are used as filler, cashew shell oil modified phenolic aldehyde and modified fatty amine are used as curing agents, silane coupling agent 1121 is used as adhesion promoter, and solvent-free bicomponent epoxy anticorrosive paint for underwater steel is prepared by the normal preparation process under the cooperation of functional auxiliaries. The epoxy anticorrosive paint for underwater steel has fine environment friendliness, can be brushed or scraped at rusted damp interfaces of underwater steel, can be quickly cured to form films, excellent in coating adhesive power, capable of removing, converting and stabilizing rusts, high in resistance to impact, abrasion and corrosion and widely applicable to corrosion resistance of various underwater steel facilities.

Description

Technical field [0001] The invention relates to the technical field of metal anticorrosion coatings, in particular to an epoxy anticorrosion coating for underwater iron and steel. Background technique [0002] Today, with the rapid development of my country's economy and the enhancement of comprehensive national strength, offshore oil, shipping, and wind power industries are developing rapidly. Engineering structures in the marine environment, such as ports, drilling platforms, cross-sea bridges, underwater pipelines, ships, and wind power towers Due to being in the seawater full immersion area, tidal range area, and splash area all the year round, they are subjected to erosion and corrosion by seawater and marine organisms, which damages the original anti-corrosion protective coating on the structure; on land, due to the construction of water conservancy, reservoirs, Dikes, dams, sluices, hydropower stations, and water conservancy projects are scattered all over the land, and...

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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