The use of polyurethane paint in conjunction with epoxy primers is referred to as a heavy-duty anti-corrosion coating system, and it is commonly employed in anti-corrosion projects due to its good overall performance.
Polyurethane coating systems offer the lowest life cycle cost of any paint and can exceed the stringent organic volatile emission criteria in Europe and the United States. Polyurethane paint has been successfully applied to bridges, offshore platforms, port machinery, plant equipment, storage tanks, pipelines, and construction facilities such as airports and stadiums due to its excellent chemical properties, good economic efficiency, and low organic emission standards.
As the demands for the protective function and look of technical coatings continue to rise, polyurethane's use in the field of corrosion prevention for steel structures is growing across the world. One-component wet-curing polyurethanes and tenonate polyureas, in addition to traditional two-component polyurethane technology, have expanded the scope of application of polyurethane paint in the field of corrosion protection coatings and have provided solutions to many engineering challenges in many engineering applications in Europe and the United States.
Wet-curing polyurethanes and radonate polyurethanes both have short coating intervals and quick curing reactions, and their rapid qualities can be coupled to make a fast-treatment coating system. Wet-curing polyurethane and radonate polyurea, on the other hand, both have outstanding corrosion resistance, and combining the two increases the system's technical benefits of high functionality and heavy corrosion resistance.
According to the introduction, a two-component high elasticity epoxy - polyurethane heavy anti-corrosion coating is made up of an elastic polyester comprising hydroxyl and epoxy resin as the basic material, as well as a defoamer and other additives.
The A and B components are combined in a certain ratio and applied for 30 minutes. After the organic solvent evaporates, the reaction between component A and component B takes place, and they cross-link to produce a net-like structure that cures. The very flexible epoxy-polyurethane anti-corrosion coating relies heavily on the flexible polyester resin. Various pipeline anti-corrosion, oil tank internal and exterior wall anti-corrosion, and pool anti-permeation projects can be coated with highly elastic epoxy-polyurethane heavy-duty anti-corrosion coatings. The coating is a novel form of anti-corrosion material that has a wide range of applications, is inexpensive, and has good anti-corrosion capabilities.
Heat-resistant epoxy polyurethane anti-corrosion coating is also becoming more popular. The anti-corrosion coating, which uses epoxy resin as the film-forming material and TDI and TMP adducts as the curing agent, has high adhesion, high strength, low shrinkage, chemical resistance, and corrosion resistance, as well as excellent flexibility, wear resistance, oil resistance, high fullness, ageing resistance, and film-forming properties. The epoxy polyurethane coating has excellent boiling resistance and low temperature curing properties, and can be used as internal corrosion protection for metal sewage tanks, storage tanks, pipelines, concrete storage pools, and chemical storage tanks, as well as an internal and external anti-corrosion coating for thermal pipes.