Principle of industrial anti-corrosion steel pipe

Coating anti-corrosion is a uniform and dense coating formed on the surface of the rust-free metal pipe, which can isolate it from various corrosive media. Steel pipe anti-corrosion coatings are increasingly using composite materials or composite structures. These materials and structures must have good dielectric properties, physical properties, stable chemical properties, and a wide temperature range.

Exterior wall anti-corrosion coating: Types and application conditions of steel pipe outer wall coatings. Inner wall anti-corrosion coating This film is applied to the inner wall of the steel pipe to prevent steel pipe corrosion, reduce friction resistance, and increase dosage. Commonly used coatings are amine-cured epoxy resins and polyamide epoxy resins, with a coating thickness of 0.038 to 0.2 mm. To ensure that the coating is firmly bonded to the pipe wall.

The inner wall of the pipe must be surface-treated. Since the 1970s, the same material has been used to coat the inner and outer walls of steel pipes, so that the inner and outer walls of steel pipes can be coated at the same time. Anti-corrosion and thermal insulation coatings are applied to small and medium-diameter heat transfer crude oil or fuel oil steel pipes to reduce the heat dissipation of the steel pipe to the soil.

A thermal insulation and anti-corrosion composite layer is added to the outside of the steel pipe. The commonly used thermal insulation material is rigid polyurethane foam, which is suitable for the temperatures of this material. This material is soft. To increase its strength, a high-density polyethylene layer is applied to the outside of the thermal insulation layer to form a composite material structure to prevent open water from penetrating the thermal insulation layer.