Anti-corrosion technology for seamless steel pipes is essential to protect pipes from corrosion and extend their service life, especially when the pipes are exposed to corrosive environments. There are several anti-corrosion technologies commonly used for seamless steel pipes.
Seamless steel pipe
Coating system:
Internal coatings: For pipes carrying corrosive fluids, applying internal coatings can prevent corrosion and protect the materials being transported.
Exterior Coating: Exterior coating protects the outer surface of the pipe from environmental corrosion. Common exterior coatings include:
Fused-bonded epoxy (FBE): Applied as a dry powder to heated pipe surfaces to form a protective layer.
Three-layer polyethylene (3LPE) or polypropylene (3LPP): Consists of a melt-bonded epoxy resin layer, an adhesive layer, and a polyethylene or polypropylene layer.
Cathodic protection:
Electrochemical cathodic protection: involves attaching a sacrificial anode (usually made of zinc or magnesium) to the steel pipe. These anodes corrode instead of steel, thus providing protection.
Impressed current cathodic protection: Uses an external power source to apply an electric current to the steel to prevent corrosion.
Corrosion inhibitor:
Chemical Inhibitors: Corrosion inhibitors can be added to the fluid transported by the pipeline to reduce the corrosion effect on the steel.
Wrapping tape:
Asphalt-based tape: Tape used on the outer surface of pipes to provide a protective layer against corrosion.
Thermal Spray:
Metallic coating: A metallic coating (such as zinc or aluminum) is applied to the surface of the pipe using thermal spraying.
cement mortar lining
The pipes are lined with a layer of cement mortar to prevent corrosion in water and wastewater applications.
