According to the estimates of the Chinese Academy of Engineering

the loss caused by corrosion in China is more than trillions of RMB every year Chinese Academy of Engineering. Corrosion damage is a common problem all over the world. Polyurethane coating plays an important role in the coating industry due to its excellent properties and is widely used in corrosion protection of materials. In order to further improve the corrosion resistance of the products

the researchers used different modification methods to prepare polyurethane anti-corrosive coatings with different functions. This article generalizes and introduces modification methods of polyurethane anti-corrosive coatings

which include Organic resin modification

nano material modification

corrosion inhibitor modification and microcapsule self-repairing modification. Meanwhile

the research progress of polyurethane coating in the field of anti-corrosion is introduced

and the future research direction and development trend are prospected.