How to improve the rust resistance of galvanized steel pipes

　Although the use of galvanized steel pipes is becoming more and more extensive, the use of different environments, so now the requirements for galvanized steel pipes are becoming more and more stringent, and now the corrosion resistance of galvanized steel pipes have new requirements, because the current galvanized steel pipes on the brushing process requirements are also very strict.

　　1. Rust removal: This is an important process before the coating of galvanized steel pipes, components, etc. It is the key to the quality of galvanized steel pipes. Thorough rust removal can improve the adhesion of antirust paint and prolong the service life of galvanized steel pipe.

　　2. After sandblasting, shot blasting or pickling treatment, the surface of Large diameter Galvanized Steel Pipe, such as iron oxide scale and rust can be cleaned up, which improves the adhesion of the coating. When the installation site is unconditionally treated by sand blasting and shot blasting, manual mechanical rust removal can be adopted, but the quality of rust removal must be achieved.

　　3. When using sandblasting or manual mechanical rust removal, the surface metal of galvanized steel pipe is exposed directly in the air because of the oxide scale of galvanized steel pipe falling off. If a primer is not applied in time, the surface of galvanized steel pipe is easy to rust again, which affects the adhesion of paint film. As the paint is a time-sensitive material, inventory backlog is easy to expire, so the paint must be re-examined before use the main indicators, the results meet the standard before use.