In order to extend the service life of most spiral steel pipes, anti-corrosion treatment must be carried out. Why should it be removed before the preservative treatment? In addition to processing, not only the construction period is delayed, but also the cost is high.
We first remove the rust. There are two types of rust removal: sand blasting and shot blasting: shot blasting is the use of a small steel ball or iron ball hitting the surface of the part at high speed by the high-speed rotation of the impeller, so the oxide layer on the surface of the part can be kept away of. Sandblasting is a method of using compressed air to quickly sweep the surface of quartz sand. Not only rust, but also degreasing, this is a very useful painting. It is often used to remove rust on the surface of parts. In this way, after rust removal, the surface of the spiral steel pipe is rough and the surface grease is removed. It has certain adhesion to anti-corrosion winding and painting. After the anti-corrosion treatment of spiral steel pipe, it is difficult to effectively protect the internal rust.
Studies have shown that the service life of anticorrosive spiral steel pipes after rust removal is more than 5 years.
