Surface treatment of spiral steel pipe and maintenance and maintenance methods in winter
1. Cleaning. Use solvents and emulsions to clean the surface of steel to remove oil, grease, dust, lubricants and similar organic substances, but it cannot remove rust, oxide scale, welding flux, etc. on the surface of steel, so it is only used as an auxiliary in anti-corrosion production. trick.
2. Spray (throwing) to remove rust. Generally speaking, shot blasting (sand) rust removal is mainly used for the treatment of the inner and outer surfaces of the pipe, and shot blasting (sand) rust removal is mainly used for the treatment of the outer surface of the pipe.
3. Derusting and pickling of things. First, use tools such as wire brushes to polish the surface of the steel, which can remove loose or raised oxide scale, rust, welding slag, etc. Although chemical cleaning can make the surface reach a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the environment.
