Jan 29, 2021
There are many ways to remove rust. Most of us know that Qingdao Wozhou Machinery Manufacturing Co., Ltd. will summarize the differences and similarities between rust removal with sandblasting machine and shot blasting machine, so that everyone can understand better.
1. Sand blasting machine shot blasting machine small pneumatic or electric rust removal. It is mainly powered by electricity or compressed air, equipped with a suitable rust removal device, and performs reciprocating or rotating motion to meet the rust removal requirements of various occasions. Such as angle grinders, wire brushes, air-driven needle beam rust removers, air-driven rust hammers, tooth-shaped rotary rust removers, etc., are semi-mechanized equipment with light tools and high mobility, which can remove rust more thoroughly. , Old coating, etc., can roughen the coating, the efficiency is greatly improved than manual rust removal, up to 1~2m2/h, but can not remove the oxide scale, the surface roughness is small, and the high-quality surface treatment quality cannot be achieved , The work efficiency is lower than spray treatment. It can be used in any part, especially in the process of ship repairing.
2. Shot blasting (sand) to remove rust. It is mainly composed of particle jet erosion to achieve surface cleanliness and suitable roughness. The equipment includes open shot blasting (sand) rust remover, closed shot blasting (sand chamber), and vacuum shot blasting (sand) machine. The open shot blasting (sand) machine is widely used, and can more thoroughly remove all impurities on the metal surface, such as oxide scale, rust and old paint film. The rust removal efficiency is 4~5m2/h, the mechanical degree is high, and the rust removal quality it is good. However, because abrasives generally cannot be recycled, it affects other operations and is troublesome to clean the site. Therefore, the environmental pollution is serious, and its use has been gradually restricted recently.
3. High pressure water abrasive rust removal. The impact of high-pressure water jets (plus the grinding action of abrasives) and the action of water skid are used to destroy the adhesion of rust and coating to the steel plate. Its characteristics are no dust pollution, no damage to the steel plate, greatly improving the rust removal efficiency, up to 15m2/h, and good rust removal quality. However, the steel plate after derusting is easy to return to rust, and special wet derusting paint must be painted, which has a greater impact on the coating of general performance paint.
4. Shot blasting machine to remove rust. Shot blasting rust removal is the use of high-speed rotating impellers to throw abrasives on the surface of steel to achieve the purpose of rust removal. It is a relatively advanced mechanical treatment method for removing rust from hull steel. It not only has high production efficiency, but also has low cost and automation. High degree, can realize assembly line operation, less environmental pollution, but only operate indoors. Chemical rust removal is mainly a rust removal method that uses acid to react with metal oxides to remove rust products on the metal surface, that is, the so-called pickling rust removal, which can only be performed in the workshop.
