What is the principle of surface pretreatment of steel plate

Steel plate surface pretreatment in steel plate blanking refers to the treatment process that steel plate is derusted and coated with a layer of primer under the condition of raw materials. The surface pretreatment of steel plate includes shot blasting and painting.

Steel plate shot blasting pretreatment is to accelerate abrasive (steel shot, steel wire segment, angular steel sand, etc.) by centrifugal force generated by high-speed shot blasting machine during high-speed rotation, to shoot abrasive at a very high speed to the treated steel surface, produce impact and grinding effect, remove the rust on the steel surface of the oxide skin box, make the steel surface exposed to the true color of metal and present a certain roughness, so as to adhere the paint.

Spraying treatment is a kind of spraying process that the steel plate after shot blasting pretreatment is automatically sprayed by high pressure automatic spray gun to make the steel plate surface obtain uniform paint film.