铸件在上漆前都要经过表面清理,否则油漆不能牢固的附着在铸件表面上,降低保护性能,造成铸件很快锈蚀,降低使用寿命,影响外观;特别是湿热地带使用,如果清理不好,就更容易使铸件锈蚀,油漆起泡。铸件表面清理有手工、机械和化学等三种方法。手工清理是用砂纸擦、砂石磨、钢丝刷擦,其速度慢,质量差,因此一般采用机械清理。机械清理中,喷砂是先进的方法,但它投资费用大,操作时灰尘多,劳动强度高,清理小件及形状复杂 Casting before going through the surface cleaning, or paint can not be firmly attached to the casting surface, reducing the protective properties, resulting in rapid corrosion of castings, reducing the service life, affecting the appearance; especially hot and humid zone to use, if the cleaning is not good, Casting is more likely to rust, paint bubbles. Casting surface cleaning with manual, mechanical and chemical methods such as three. Manual cleaning is sandpaper rub, sand mill, wire brush, the slow speed, poor quality, so the general use of mechanical cleaning. In mechanical cleaning, sandblasting is an advanced method, but it is expensive in investment, dusty in operation, high in work intensity, clean up small pieces and complicated in shape