Solid-plastic compound heavy-duty anti-corrosion epoxy powder and application thereof

Abstract

The invention discloses a solid-plastic compound heavy-duty anti-corrosion epoxy powder.The solid-plastic compound heavy-duty anti-corrosion epoxy powder is prepared from epoxy resin, modified thermoplastic resin, a curing agent, a toughening agent, a flatting agent, pigment, an antioxidant and filler.With epoxy resin and modified thermoplastic resin used and compounded, the solid-plastic compound heavy-duty anti-corrosion epoxy powder is an organic and perfect combination of thermoset powder and thermoplastic powder.According to the solid-plastic compound heavy-duty anti-corrosion epoxy powder, electrostatic spraying is omitted, a compact interpenetrating network form structure is formed by compounding epoxy resin and modified thermoplastic resin in cooperation with a specific curing system in the heating fusing and curing process, and an anti-corrosion protecting layer of an overall network form structure on the outer surface of a steel tube is formed.The invention further discloses application of the solid-plastic compound heavy-duty anti-corrosion epoxy powder in preparing an anti-corrosion tube.

Description

technical field [0001] The invention relates to the field of anti-corrosion of oil and gas pipelines, in particular to a solid-plastic composite heavy-duty anti-corrosion epoxy powder and a preparation method thereof, and the epoxy powder is used to prepare anti-corrosion pipes. Background technique [0002] With the rapid development of my country's economic construction and the continuous development of the petroleum industry, the requirements for pipeline anticorrosion are getting higher and higher. It is urgent to develop an anticorrosion structure with simple production process and more reasonable cost performance. [0003] Traditional anti-corrosion coating structures include the use of thermosetting anti-corrosion powders and thermoplastic anti-corrosion powders. Thermosetting anti-corrosion powders include epoxy resin, polyester and acrylic resin. Thermoplastic anticorrosion powders include polyethylene, polypropylene, polyester, polyvinyl chloride, and chlorinated ...

AI Technical Summary

Problems solved by technology

However, the traditional epoxy anti-corrosion powder coating has poor impact resistance and moisture absorption. The disadvantage of the traditional polyethylene anti-corrosion powder coating is that the mechanical strength is not high and the adhesion to the substrate is poor.

At the same time, anti-corrosion pipelines prepared by traditional anti-corrosion powder also have many defects, such as serious pollution in the production process of petroleum asphalt anti-corrosion pipes, easy to flow at high temperature, easy to brittle and fall off at low temperature, high production cost of three-layer PE anti-corrosion pipes, great difficulty in forming, and cathodic shielding. It is difficult to achieve cathodic protection; common external anti-corrosion epoxy powder coatings have poor impact strength, abrasion resistance, and UV resistance, etc.

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