Here are some ways to remove the rust on the surface of the sand making machine.
1. Small wind or electric rust removal. Mainly electric or compressed air as the power, the assembly of appropriate rust removing device, reciprocating motion or rotation movement, in order to meet the requirements of various occasions of rust removal. As the angle grinder, wire brush, pneumatic needle beam device, pneumatic derusting and chipping hammers, tooth type rotary descaling device, which belongs to the semi mechanized equipment, light weight, high flexibility, can thoroughly remove rust, old coating, the coating for wool processing, greatly improve the efficiency than manual derusting. Up to 1~2m2/h, but cannot remove the oxide skin, the surface roughness is small, cannot achieve high-quality surface treatment quality, work efficiency is low injection processing. It can be used in any part, especially in the process of ship repair.
2, shot peening (sand) rust removal. It is mainly composed of particle spray erosion to achieve surface cleaning and proper roughness. The equipment includes open shot blasting (sand) rust remover, closed shot blasting (sand chamber) and vacuum shot blasting machine. The open shot blasting machine is widely applied, which can completely remove all impurities on the metal surface, such as oxide scale, rust and old paint film. The rust removal efficiency is high 4~5m2/h, the mechanical degree is high, and the rust removal quality is good. But because the abrasive generally can not be recycled, the other work has an impact, cleaning up the scene trouble. Therefore, the environmental pollution is heavy and has been gradually restricted to use recently.
3, high pressure water abrasive rust removal. The impact of high pressure water jet (added abrasive grinding action) and water prying action destroy the corrosion and adhesion of the coating to the steel plate. It is characterized by no dust pollution, no damage to the steel plate, greatly improving the efficiency of rust removal, up to 15m2/h, and the quality of rust removal is good. However, the steel plate after rust removal is easy to return to rust and must be coated with a special wet rust removing coating, which has a great influence on the coating of general performance coatings.
4, shot removing rust. Blasting is the use of high-speed rotation of the impeller will be thrown to the abrasive surface of steel to achieve the purpose of rust removing, is a kind of advanced treatment method of mechanical rust for hull steel material, not only high production efficiency, low cost, and high degree of automation, can realize the pipeline operation, less environmental pollution, but only in the operating room.
5, chemical rust removal is mainly based on the chemical reaction of acids and metal oxides, so as to remove the rust removing method of the corrosion products on the metal surface of the sand making machine, which is usually called acid pickling and rust removal, and it can only be operated in the workshop.