Steel pipeline corrosion proof reinforcing method

Abstract

The invention relates to a method for reinforcing and antisepticising steel pipeline, comprising the following steps of: processing the surface of steel pipeline to be reinforced and antisepticised, preparing epoxy ethylene resin and resin mortar, using the mortar to fill and block the crack and perforation part of the pipeline, sticking bidirectional carbon fiber cloth on the patching part, finally winding and sticking the unidirectional carbon fiber cloth on the pipeline in circularity when the surface of the pipeline is being coating by the prepared resin, the direction of the carbon filament should be right angle of 90 degrees with the axes of the pipeline, and then winding and brushing, recoating a layer of resin surface layer after the surface of the resin gel is dry. The invention has the advantages that the adopted carbon fiber epoxy ethylene resin composite material system has the excellent performances of high strength, light weight, corrosion resistance and humidity resistant, evident dual effect of reinforcing and antisepticising, and practical and reliable method for patching crack and perforation, which can greatly prolong the service life of the pipeline.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion and reinforcement of steel pipelines, and in particular relates to a method for anti-corrosion and reinforcement of steel pipelines with carbon fiber composite materials. Background technique [0002] Steel pipeline transportation technology is widely used in the chemical industry, but the steel pipeline itself is susceptible to corrosion by the internal medium, electrochemistry and the external environment. In addition to the influence of various factors such as deformation caused by internal pressure of the pipeline, the pipeline is easy to crack and perforate, and eventually Lead to pipeline leakage, affecting normal production and use. The traditional way to prolong the service life of pipelines is to use FRP composite materials to prevent corrosion of pipelines. Since the tensile strength of the FRP composite material is not high, the elastic modulus is only about 100GPa, which is muc...

AI Technical Summary

Problems solved by technology

Since the tensile strength of the FRP composite material is not high, the elastic modulus is only about 100GPa, which is much lower than the elastic modulus of steel (generally 200GPa). It can only play the role of anti-corrosion repair, and the reinforcement effect is poor

Another traditional method is to use a metal ring to reinforce the pipeline, but the metal ring is susceptible to acid, alkali, and electrochemical corrosion, and the size of the metal ring is fixed, which is inconvenient to use and high in cost