1. No oil and moisture
2. No rust and oxidation
3. No adhesive impurities
4. No acid, alkali and other residues
The common surface treatment methods are as follows:
1. Manual treatment: for example, scraper, wire brush or grinding wheel can manually remove the rust and oxide scale on the surface of workpiece, but manual treatment requires a lot of labor, low production efficiency, poor quality and incomplete cleaning.
2. Mechanical treatment: it mainly includes shot blasting and shot blasting. Shot blasting is a method of using centrifugal force to accelerate the shot and project it on the workpiece to remove rust. The workpiece after rust removal is as bright as the new workpiece, which is the best method of removing rust on steel parts at present.
