Folic Acid Powder,Methylene Chloride,Butyryl Chloride Meikewote Trade Co., Ltd. , http://www.rubber-auxiliarys.com
1. Small air or electric rust removal. Mainly powered by electric or compressed air, equipped with appropriate descaling device, reciprocating or rotating motion to meet the rust removal requirements of various occasions. Such as angle grinder, wire brush, pneumatic needle rust remover, pneumatic rust hammer, tooth type rotary rust remover, etc., belonging to semi-mechanical equipment, light weight, large mobility, can completely remove rust , old coating, etc., can be applied to the coating, the effect is much higher than manual derusting, up to 1~2m2 / h, but can not remove the scale, the surface roughness is small, can not achieve high quality surface treatment quality The work efficiency is lower than the spray treatment. Can be used in any part, especially in the ship repair process.
Shot blasting (sand) derusting. It is mainly composed of particle jet erosion to achieve surface cleaning and suitable roughness. The equipment includes open shot blasting (sand) descaling machine, closed shot blasting (sand chamber), vacuum shot peening (sand) machine. The open type shot blasting (sand) machine is widely used, which can completely 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 quality is high. it is good. However, it is generally impossible to recycle due to abrasives, which has an impact on other operations and troubles in cleaning the site. Therefore, environmental pollution is heavier and has recently been restricted.
3. High-pressure water abrasive rust removal. The impact of the high pressure water jet (plus the abrasive action of the abrasive) and the water rafting damage the adhesion of the rust and the coating to the steel sheet. Its characteristics are no dust pollution, no damage to the steel plate, greatly improve the rust removal efficiency, up to 15m2 / h or more, good derusting quality. However, the steel plate after rust removal is easy to return to rust, and it is necessary to apply a special wet rust-removing paint, which has a great influence on the coating of general performance paint.
4, shot blasting. Shot blasting is the use of a high-speed rotating impeller to throw the abrasive onto the steel surface to achieve the purpose of rust removal. It is a relatively advanced mechanical treatment method for rust removal of hull steel, which not only has high production efficiency, but also low cost and automation. The degree is high, the pipeline operation can be realized, and the environmental pollution is small, but it is only operated indoors.
Chemical descaling is mainly a derusting method that uses a chemical reaction between an acid and a metal oxide to remove the rust product on the surface of the metal, that is, the so-called pickling and rust removal, which can only be operated in the workshop.
Dilute hydrochloric acid. Be careful not to soak the rust in the inside for too long, otherwise the material inside will be reacted by the surface rust, for example, the iron rust will react with the iron, and sandblasting and shot blasting can also be used. See the following instructions for details: