Solvent-free epoxy heavy anti-corrosion paint extruded and coated to inner wall of crude oil gathering pipeline

Abstract

The invention discloses a solvent-free epoxy heavy anti-corrosion paint which is extruded and coated to the inner wall of a crude oil gathering pipeline. The paint comprises a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 10-25 parts of E-51 epoxy resin, 12-30 parts of F-51 epoxy resin, 10-15 parts of titanium dioxide, 1-2 parts of phthalocyanine green, 1-2 parts of organic yellow, 1.5-3 parts of a thixotropic agent, 0.3-0.5 part of a wetting dispersant, 5-8 parts of inert liquid resin, 3-5 parts of an active diluting agent, 3-5 parts of a hyperbranched toughening agent, 15-20 parts of precipitated barium sulfate, 8-15 parts of anti-rust pigment, 0.3-0.5 part of a defoaming agent, 0.2-0.4 part of a flatting agent; the component B is prepared from 30-70 parts of modified phenolic amine curing agent and 70-30 parts of modified aromatic amine curing agent; and the mass ratio of the component A to the component B is(5-7):1. The solvent-free epoxy heavy anti-corrosion paint is applicable to gathering pipeline extruding and coating processes, the pipeline inner wall coating has excellent corrosion resistance and physical performance, the coating process can be reduced, the construction time can be saved, and the work efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free epoxy heavy-duty anti-corrosion coating for extrusion coating on the inner wall of crude oil gathering and transportation pipelines, and meanwhile, the invention also relates to a preparation method of the coating. Background technique [0002] For a long time, the crude oil transported by the gathering and transportation pipelines in the oil field contains a large amount of water and additives, which has caused more and more corrosion on the inner wall of the pipeline. The general service life is about 1 year, and leakage occurs within 3 months, resulting The pipeline is scrapped. The buried depth of the gathering and transportation pipeline is generally about 1.2m, and the cost of replacing the pipeline is very high. In the past, when the oil price was high, it was usually re-laid. Now the oil price is low, the profit of the oil field is low, and the cost of man...

AI Technical Summary

Problems solved by technology

[0002] For a long time, the crude oil transported by the gathering and transportation pipelines in the oil field contains a large amount of water and additives, which has caused more and more corrosion on the inner wall of the pipeline. The general service life is about 1 year, and leakage occurs within 3 months, resulting Pipeline scrap

The buried depth of the gathering and transportation pipeline is generally about 1.2m, and the cost of replacing the pipeline is very high. In the past, when the oil price was high, it was usually re-laid. Now the oil price is low, the profit of the oil field is low, and the cost of manufacturing, laying and updating the pipeline is quite high. Expensive, therefore, places extremely high demands on in-line corrosion protection

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