Anti-corrosion treatment method for on-site construction of elastic anti-corrosion coating

Abstract

The invention provides a preservative treatment method for site construction of an elastic anticorrosive coating, and belongs to the technical field of site anticorrosive construction treatment of pipelines. The invention adopts the following technical scheme that the preservative treatment method comprises the following steps: finding out the position of a metal pipeline connecting piece needingpreservative treatment; secondly, winding and wrapping the surface of the metal pipeline connecting piece with a plastic thermal shrinkage film, and heating the plastic thermal shrinkage film; completely wrapping the surface of the whole metal pipeline connecting piece by the plastic thermal shrinking film subjected to thermal shrinking by heating, so as to obtain flatter construction surface of the metal pipeline connecting piece; thirdly, spraying the elastic anticorrosive coating on the surface of the plastic thermal shrinking film of the metal pipeline connecting piece, and completely covering the plastic thermal shrinking film by the elastic anticorrosive coating. According to the preservative treatment method provided by the invention, the technical problem that construction requirements of reactive spraying cannot be met because manual derusting cannot completely remove rust on metal connecting pieces such as a flange, a valve and a loose joint when the elastic anticorrosive coating is subjected to the site construction is solved.

Description

technical field [0001] The invention relates to the technical field of on-site anti-corrosion construction treatment of pipelines, in particular to an anti-corrosion treatment method for on-site construction of an elastic anti-corrosion coating. Background technique [0002] Reactive spraying elastomer (including polyurethane elastomer and polyurea elastomer) thick film coating anticorrosion technology is a new type of material and construction technology developed in the past ten years. The construction advantages such as dense and seamless layers, as well as the characteristics of high mechanical strength, good elasticity, corrosion resistance and wear resistance of coating materials, have begun to gradually replace traditional anti-corrosion paints, and are used in pipeline anti-corrosion construction (especially pipeline anti-corrosion sites) Construction) field has been applied. The anti-corrosion principle of the coating material is to form a continuous, high-strength...

AI Technical Summary

Problems solved by technology

[0004] The current problems are: on the one hand, after the metal pipeline has been treated with elastic anti-corrosion coating, the metal joints such as flanges, valves and unions on the pipeline may need to be dismantled and repaired irregularly, which requires partial removal of the above-mentioned The coating on the surface of the metal coupling, but due to the high adhesion between the coating material and the metal, the thickness of the coating, and the high strength of the coating, it is difficult to remove the coating material. At the same time, it will also cause external corrosion due to local damage to the coating The intrusion of the medium causes corrosion of the metal joints

For metal pipes with a relatively smooth surface, the effect of manual rust removal is acceptable, but for metal joints such as flanges, valves, and unions with complex shapes, the rust on the metal surface is difficult to remove by hand

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