Sandblasting, also known as abrasive blasting, is a process that involves forcibly propelling a stream of abrasive material against a surface under high pressure. This method is used to smooth rough surfaces, roughen smooth surfaces, or remove surface contaminants.
The process works by using compressed air or water to propel abrasive materials at high velocity toward a target surface. Common abrasive materials include silica sand, steel grit, copper slag, and glass beads. Each material has different properties suited to specific applications.
Common Applications
Rust removal, paint stripping, surface cleaning
Materials Used
Sand, steel grit, glass beads, aluminum oxide
Surface Types
Metal, concrete, wood, brick, stone
The technique was first patented in 1870 and has since become a standard industrial process. Modern sandblasting equipment includes pressurized blast pots, blast cabinets, and portable units. Safety equipment such as protective clothing, respirators, and blast hoods are essential due to the hazardous nature of airborne particles.
Different blasting media produce different surface finishes. Fine media creates smoother finishes while coarse media removes material more quickly. The choice of media depends on the desired outcome and the substrate being treated.