The anti - corrosion and rust - prevention treatment of sand dryers is also a crucial part in the manufacturing of dryers. The following are several anti - corrosion methods:

Electrostatic powder spraying. In the application of drying equipment manufacturing, traditional paint coatings are liquid, containing a large amount of organic solvents such as esters, ketones, and hydrocarbons. This brings a series of troubles to production, storage, transportation, and construction. It is flammable, explosive, and very unsafe. Using electrostatic powder spraying can perfectly improve this situation.

The phosphating and passivation process, through electrical and electrochemical reactions, can, with a one - time treatment, not only make the rust - covered steel workpieces show the original color of the metal on the surface but also generate a dense anti - rust film layer on the metal surface.

As the drying technology has developed and been applied until now, its success is not only related to the drying level and the development of science and technology but also closely related to the structure of the drying equipment, material selection, and manufacturing methods. Therefore, paying attention to material selection has important economic and practical significance.