The process of using compressed air to push the sandblasting abrasive to the surface of metal and other workpieces is called sandblasting. It is also called shot peening and shot peening. Abrasives are divided into silicon carbide, ceramics, aluminum oxide, zirconia fused alumina, etc.
Zirconia fused alumina because sand was the only abrasive that could be used in the early days of shot peening technology, shot peening was always called sandblasting at that time and for a long time afterwards.
Among the various surface pretreatment methods of metal sandblasting, sandblasting (shot peening) has the most thorough effect, the strongest adaptability and the widest application range. This is because: it cleans the steel surface the fastest and most thoroughly; only sandblasting can be evaluated with 4 cleaning levels that have been established and accepted by everyone; sandblasting can clean surfaces that are usually difficult to clean, and some special tools can be used to clean the inner surface of the pipe, and the sandblasting cost is the lowest.
The sandblasting treatment in the metal sandblasting process can make the cleaned surface obtain the required cleanliness and a certain roughness at the same time, and improve the adhesion of the coating on the basic surface. No matter how good the coating is, it cannot adhere well to the surface of the workpiece that has not been surface treated for a long time.
The role of surface pretreatment is to clean the surface and generate the roughness required to "lock" the coating on the surface. After the workpiece surface is coated with industrial coatings with good performance, the coating life can be more than 3.5 times higher than the same quality coating on the surface treated by other methods. Another advantage of sandblasting (shot blasting cleaning) is that the surface roughness can be determined in advance according to requirements and is easy to achieve during the cleaning process.
Zirconia fused alumina abrasives have advantages in metal sandblasting technology. Special zirconia fused alumina abrasives have moderate hardness, high bulk density, no free silica, high specific gravity, and good toughness. Super rock zirconia fused alumina is an ideal "environmentally friendly" sandblasting material, widely used in aluminum profiles, copper profiles, glass, washed jeans precision molds and other fields.
