*The equipment is made of metal material, and metal is prone to oxidation reaction, which leads to corrosion;
*There are many impurities in the metal and it is easy to be corroded;
*The more complex the shape of the parts, the rougher the surface and the worse the corrosion resistance;
*The working environment has high temperature and high humidity, or there are many oxygen and chloride ions in the environment, and it is easy to have a chemical reaction with the dryer, thereby accelerating its corrosion degree.
