Spiral steel pipe is a spiral seam steel pipe made of strip steel coils as raw materials, often extruded and formed by automatic double-wire double-sided submerged arc welding. So what are the surface treatment methods of spiral steel pipe?
① Clean up. Use organic solvents and solvents to clean the steel surface to remove oil, vegetable grease, dust, polish and similar organic compounds, but it is not enough to remove the rust, air oxide scale, welding flux, etc. on the steel surface. It is only used as an auxiliary trick in anti-corrosion production.
② Spray (throw) anti-rust treatment. Generally speaking, shot blasting (sand) antirust treatment is mainly used to treat the inner surface of water pipes, and shot blasting (sand) antirust treatment is mainly used to treat the outer surface of water pipes.
③ Anti-rust treatment, pickling passivation of articles. Mainly use steel brushes and other items to polish the surface of the steel, which can remove loose or warped air scale, rust, weld penetration, etc. Although the chemical properties can make the surface reach a certain level of cleanliness and roughness, its anchor lines are shallow, and it is easy to cause environmental pollution to the situation.
