Corrosion of mechanical equipment is a major problem in the production of chemical enterprises. Due to the special production medium, the equipment is often corroded by various chemical elements, mainly hydrogen chloride gas. The mechanical equipment and various pipe fittings in production are severely corroded, and the impeller of the centrifugal blower is severely corroded. The impeller of the centrifugal blower is in large contact with hydrogen chloride gas and there is a lot of moisture at the same time. The impeller material is chromium-nickel, but the degree of corrosion is getting more and more serious. The blades made of 3-6mm thick chromium-nickel material are as thin as paper after corrosion. This is related to the environment and production technology.

At first, 470 resin was applied to the surface of the centrifugal fan impeller, but from the operation situation, the effect is not very good.

A few days later, the vibration value of the centrifugal fan reaches an amplitude of 10-20mm/s, which seriously affects production.