Wan kun fan science popularization - Why do we need to paint the impeller?

The final process of the impeller is surface treatment—painting. So, why do we need to paint it?

First, it prevents corrosion and rust; due to the complex operating conditions, the metal surface of the impeller may be corroded by the corrosive gases in the air; the paint film formed can isolate the medium, thereby extending the service life of the impeller;

Second, wear protection: when the impeller rotates at high speed, it may be subject to wear from dust particles, and the coating can enhance the wear resistance of the surface, thereby reducing wear and tear.

Third, the paintwork with unified aesthetics and signage makes the equipment look cleaner, and different colors can be used to indicate functional areas or danger warnings.

Fourth, the startup performance is optimized, and the smooth paint surface can reduce air resistance during the operation of the impeller, thereby decreasing energy loss and improving the efficiency of the fan;

Fifth, it is necessary to prevent oxidation by avoiding direct contact between metals and oxygen, thereby preventing oxidation reactions and maintaining the stability of the impeller structure.

These objectives work together to ensure the reliable operation and economic performance of the fan.