High-temperature and high-pressure resistant solvent-free heavy anti-corrosion paint and preparation method thereof

Abstract

The invention relates to a high-temperature and high-pressure resistant solvent-free heavy anti-corrosion paint composition, which comprises a material A and a material B. The material A is prepared from the following components: 40-60 parts of phenolic epoxy resin, 5-10 parts of bisphenol F resin, 5-10 parts of a reactive toughening agent, 5-10 parts of an active diluent, 1-3 parts of a thixotropic agent, 5-10 parts of a heat-resistant pigment, 1-2 parts of an auxiliary agent and 5-10 parts of filler; and the material B is 20-30 parts of a curing agent and is a mixture of modified fatty amineand modified phenolic aldehyde amine. The high-temperature and high-pressure resistant solvent-free heavy anti-corrosion paint is a solvent-free system, is environmentally friendly and green, can benormally constructed at a temperature of 0-40DEG C, is cured at the normal temperature and does not need to be heated. And after the paint is completely cured, a long-acting anti-corrosion function can be achieved under the high-pressure high-temperature and heavy corrosion working conditions of a watering pipeline, a high-pressure gas collecting pipeline and the like, the use efficiency of a conveying pipeline is improved, and the conveying safety is improved.

Description

technical field [0001] The invention relates to the technical field of epoxy coatings, in particular to a solvent-free heavy-duty anti-corrosion coating resistant to high temperature and high pressure. Background technique [0002] Due to the utilization of geothermal water resources, geothermal water is mixed with produced oil in the oil field, and then transported for a long distance through buried pipelines, which are called water-mixed pipelines. This approach can effectively save resources and improve oil transportation efficiency. However, the temperature of the water-mixed pipeline is very high due to the geothermal water. The general design temperature is 135°C, which is often accompanied by a high delivery pressure. With the increase of the service life, the corrosion phenomenon of the pipeline is intensified, the inner wall of the pipeline is unevenly thinned, the pressure bearing capacity is reduced, and local perforation and rupture cause leakage accidents. [...

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Problems solved by technology

However, the temperature of the water-mixed pipeline is very high due to the geothermal water. The general design temperature is 135°C, which is often accompanied by a high delivery pressure. With the increase of the service life, the corrosion phenomenon of the pipeline is intensified, the inner wall of the pipeline is unevenly thinned, the pressure bearing capacity is reduced, and local perforation and rupture cause leakage accidents.

[0003] Traditional high-temperature and high-pressure heavy-duty anti-corrosion coatings currently only have solvent systems, which are accompanied by solvent volatilization during the construction of long-distance buried pipelines. However, due to the air tightness in the pipeline, the solvent volatilization speed is slow and incomplete, which prolongs the commissioning of the pipeline. Period, and at the same time greatly reduce the original performance of the coating, can not achieve long-term anti-corrosion effect

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