Long-distance oil and gas pipelines are an important way to ensure energy. In the process of anti-corrosion construction of oil and gas pipelines, the surface treatment of straight seam steel pipes is a key factor in determining the service life of pipeline anti-corrosion. It is the premise of whether the anti-corrosion layer and the steel pipe can be firmly combined. It has been verified by research institutions that the life of the anti-corrosion layer depends on factors such as the type of coating, coating quality, and construction environment. Standardize the requirements for the surface of steel pipes, continuously explore and summarize, and continuously improve the surface treatment methods of steel pipes.
1. The pickling of seam steel pipes is generally treated with acid and electrolysis. Pipe anticorrosion is just chemical pickling that removes scale, rust, and old coatings. Sometimes it can be used for sandblasting and rust removal. Reprocessing. Although chemical cleaning can achieve a certain degree of cleanliness and roughness, its anchoring pattern is shallow and it is easy to pollute the environment.
2. Cleaning of straight seam steel pipes Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, lubricants, and similar organics, but cannot remove the rust, scale, flux, etc. on the steel surface, so keep it. Production is for aid only.
3. The straight seam steel pipe corrosion tool mainly uses wire brushes and other tools to polish the steel surface, which can remove loose or raised rust, rust, welding slag, etc. The rust removal of hand tools can reach the Sa2 level, and the rust removal of electric tools can reach the Sa3 level. If there is a strong scale of iron oxide attached to the surface of the steel, the rust removal effect of the tool is not ideal, and the anchoring depth required for the anti-corrosion structure cannot be achieved.