How is SSAW steel pipe anti-corrosion?

The anti-corrosion process for SSAW steel pipes is a crucial step in enhancing their durability and performance in various applications. The following methods are commonly used for surface preparation and corrosion prevention for SSAW steel pipe.

Surface Polishing with Hand and Power Tools:
Tools like wire brushes are typically used to polish the steel surface of SSAW steel pipes. This process involves cleaning and preheating the pipes to remove loose scales, rust, welding slag, and other contaminants. The rust removal achieved with hand tools can reach an SA2 level, while power tools can achieve an SA3 level. However, if the iron oxide scale is strongly attached to the steel surface, the cleaning effect may be less effective, and the required anchor pattern depth for effective anti-corrosion treatment may not be achieved.

Pickling with Solvents and Emulsions:
Pickling involves using solvents and emulsions to clean the surface of welded steel pipes. This method removes organic substances such as oil, grease, dust, and lubricants but is not effective against rust, oxide scales, and flux. As such, pickling is considered an auxiliary technique in the anti-corrosion production process rather than a primary method for rust removal.

Chemical and Electrolytic Pickling:
For more thorough cleaning, chemical and electrolytic methods are commonly employed. Chemical pickling is particularly useful for pipeline anti-corrosion as it effectively removes scale, rust, and old coatings. In some cases, it serves as a post-treatment step following sandblasting and rust removal. While chemical pickling can achieve high levels of cleanliness and surface roughness, it does not generate deep anchor lines and can lead to environmental pollution due to residue left in the stacking area of the SSAW steel pipes.

These anti-corrosion methods ensure the extended lifespan and reliability of SSAW steel pipes, particularly in challenging environments.