Views: 1 Author: Site Editor Publish Time: 2023-04-18 Origin: Site
The coating anticorrosion of anti-corrosion steel pipe is a uniform and dense coating formed on the surface of de-rusted metal pipes, and its coating 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 coatings: types and application conditions of pipeline exterior wall coatings. Inner wall anti-corrosion coating This film is applied to the inner wall of the pipeline to avoid corrosion of the pipeline, reduce frictional resistance and increase the dosage. Commonly used coatings are amine-cured epoxy resin and polyamide epoxy resin, and the coating thickness is 0.038 to 0.2 mm. Ensure that the coating is firmly bonded to the pipe wall.
Surface treatment must be performed on the inner wall of the tube. Since the 1970s, the same material has been used to coat the inner and outer walls of pipes, making it possible to coat both the inner and outer walls of pipes at the same time. Anti-corrosion and thermal insulation coatings are used on small and medium-diameter heat transfer crude oil or fuel oil pipelines to reduce heat dissipation from the pipeline to the soil.
A layer of thermal insulation and an anti-corrosion composite layer is added to the outside of the pipeline. The commonly used heat insulation material is rigid polyurethane foam, and the applicable temperature is that this material is soft. To increase its strength, a layer of high-density polyethylene is applied on the outside of the insulation to form a composite structure to prevent penetration of open water into the insulation