Anti-corrosive structure of 3PE coating pipe

Anti-corrosive structure of 3PE coating pipe

3PE (three-layer polyethylene) coating is a widely used anti-corrosion material, this coating structure is composed of three different layers of materials, each layer closely combined to form a strong anti-corrosion protection system.

1. Epoxy Powder Coating
Features:
The epoxy powder layer is the first layer of the coating and is in direct contact with the surface of the steel pipe. It is coated on the surface of the steel pipe by electrostatic spraying to form a dense protective film.
Features:
Excellent adhesion: It can be closely combined with the surface of the steel pipe to form a strong adhesive layer.
Strong corrosion resistance: effectively prevent water and oxygen penetration, prevent corrosion of steel pipe.
High temperature resistance: can withstand high temperature, suitable for hot oil and gas pipeline.
2. Adhesive Layer
Features:
The adhesive layer is located between the epoxy powder layer and the polyethylene layer, which plays a bonding role and makes the entire coating structure more firm.
Features:
Hot melt adhesive material, can be firmly bonded with epoxy powder layer and polyethylene layer.
Improve the peel resistance of the coating, so that the coating is not easy to fall off during long-term use.
3. Polyethylene Layer
Features:
The polyethylene layer is the outermost layer of the coating, which plays a protective role against external mechanical damage and chemical corrosion.
Features:
Wear resistance: can resist external wear and impact, protect the internal anti-corrosion layer.
Waterproof: effectively prevent the infiltration of moisture and corrosive media.

Weather resistance: suitable for all kinds of harsh environments, such as high humidity, underground, Marine environment, etc.

Anti-corrosion characteristics of 3PE coating pipe

1. Excellent anti-corrosion performance
Due to the synergistic effect of the three-layer coating structure, the 3PE coated tube can effectively prevent the penetration of oxygen, water and corrosive media, and the chemical corrosion resistance is remarkable.
2. High mechanical strength
The high wear resistance and toughness of the outer polyethylene can protect the safety of the pipeline during transportation, installation and operation.
3. Strong adhesion

The epoxy powder has a strong adhesion to the surface of the steel pipe, ensuring that the coating is not easy to fall off and can maintain long-term protection even in complex environments.

Conclusion

With its unique three-layer anti-corrosive structure, 3PE coated tubes play an important role in oil and gas transportation, urban infrastructure construction and chemical industry. By improving the corrosion resistance and mechanical strength, the service life of the pipeline is greatly extended, and it is an indispensable high-quality material in modern engineering projects.

Read more: 3PE/3PP Coating pipes