Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, smoothing agent, and similar organic matter, but it cannot remove the rust, oxide scale, welding flux, etc. on the surface of the steel, so it is only used as an auxiliary in the defense homework. The trick is also a simple maintenance trick.
Generally, two methods of chemical and electrolysis are used for pickling. Pipeline anticorrosion only uses chemical pickling, which can remove the oxide scale, rust, and old coatings. Sometimes it can be used for sandblasting and rust removal. Although chemical cleaning can make the appearance reach a certain degree of cleanliness and roughness, its anchor lines are shallow and easily pollute the surrounding conditions, this method is not very recommended.
3. Derusting things
Use wire brushes and other things to polish the surface of the steel to remove loose oxide scale, rust, welding slag, etc. Hand-operated tools can reach the Sa2 level for rust removal, and power tools can reach the Sa3 level for rust removal. If the steel surface adheres to a strong oxide scale, the results of the rust removal of the tool are undesirable, and the anchor pattern depth required for anti-corrosion construction cannot be reached. Compared with the original rust removal method.
4. Radiation derusting
Radiation rust removal is a high-power motor that drives the radiating blades to twist at a high speed, so that abrasives such as steel shot, steel grit, iron wire segments, minerals, etc., are subjected to radiation treatment on the surface of the submerged arc steel pipe under the effect of the strong centrifugal force of the motor, which can not only eliminate oxides, Rust and dirt, and the submerged arc steel pipe can reach the required average roughness under the effect of the fierce abrasive impact and friction, which is a relatively complete method of rust removal. After radioactive rust removal, not only can the physical adsorption effect of the pipe surface be expanded, but also the mechanical adhesion effect of the anti-corrosion layer and the pipe surface can be enhanced. Therefore, radioactive rust removal is a fantasy rust removal method for pipeline anticorrosion. Generally speaking, shot blasting should be used for internal and external surface treatment of pipes, and shot blasting should be used for surface treatment of submerged arc steel pipes.