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The desulfurization slurry circulation pump is a large-scale equipment after the relay heat exchanger and booster fan of the desulfurization system. It usually uses a centrifugal type. It directly draws the slurry from the bottom of the tower for circulation. The flow-passing parts of the desulfurization pump suffer extremely serious losses due to the combined action of corrosion, wear, and cavitation of the slurry fluid, which ultimately affects the output efficiency and service life of the pump. The physical corrosion damage encountered by general desulfurization pumps during use mainly manifests as swelling, bubbling, delamination, peeling, cracking, and diffuse under corrosion. If you want to increase the service life of the desulfurization pump, you should start by thickening the anti-corrosion layer, inhibiting medium penetration, and reducing residual stress in the lining. The most direct method is to apply an anti-corrosion coating. Sole carbon nanopolymer material SD7400 is a material specially used for anti-corrosion of desulfurization pumps. This material is used to resist wear, corrosion, cavitation in fluid environments, and adapt to alternating deformation and temperature changes. Its essence is a carbon nano-enhanced polymer with chemical corrosion resistance. It can isolate the contact between air, water and other media and the base material of the pump and impeller, minimizing rust and electrochemical corrosion. ； At the same time, the high elasticity and smooth surface endowed by its special molecular structure can also effectively improve the anti-cavitation ability of the pump and improve the efficiency of the pump.