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.
Anti-corrosion coatings for the outer wall of steel pipes: types and application conditions of coatings for the outer wall of steel pipes. Inner wall anti-corrosion coatings This film is applied to the inner wall of the steel pipe to prevent corrosion of the steel pipe, 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. In order to ensure that the coating is firmly bonded to the pipe wall.
The inner wall of the steel 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 the steel pipe 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. In order 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 into the thermal insulation layer.
Post time: Apr-14-2025