Preparation process of overflow exchange type anti-corrosion coating

Abstract

The invention discloses a preparation process of an overflow exchange type anti-corrosion coating, and belongs to the field of anti-corrosion coatings. According to the the preparation process of theoverflow exchange type anti-corrosion coating, an overflow layer can be formed in an anti-corrosion layer through the arrangement of a candle film gauze, so that on one hand, wax oil and high-temperature ceramic particles can be exchanged in the retreatment process during preparation, the quantity of the high-temperature ceramic particles in the overflow layer is increased, and the anti-corrosioneffect of the anti-corrosion layer is improved; on the other hand, when high temperature occurs in the using process, the overflow layer is in a liquid state through hot melting and has fluidity, so that the high-temperature ceramic particles are distributed more uniformly, and the corrosion resistance of the anti-corrosion layer is gradually improved along with prolonging of the use time; compared with the prior art, the anti-corrosion coating has more durable protective effect on internal metal; and meanwhile, in the process of falling back from high temperature during use, the overflow layer is continuously recombined, so that micro cracks generated accidentally can be effectively repaired, and the anti-corrosion effect and the service life of the anti-corrosion coating are effectivelyguaranteed.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a preparation process for an overflow exchange type anti-corrosion coating. Background technique [0002] Anti-corrosion coating refers to a covering layer applied on the metal surface to isolate it from the surrounding medium to control pipeline corrosion. It should have good electrical insulation and water resistance, strong adhesion to the surface of the pipeline, resistance to chemical damage and certain mechanical strength. The anti-corrosion coating usually consists of three parts: the first layer is a primer applied to the metal surface to enhance the adhesion between the metal and the main paint; the second layer is the main paint, and the commonly used materials are coal tar enamel, petroleum asphalt , polyethylene adhesive tape, epoxy resin, polyolefin coating, etc. In recent years, the latter two have been used more abroad; the third layer is a wrapping tape, wh...

AI Technical Summary

Problems solved by technology

However, a large number of studies have shown that the coating always has a certain degree of air permeability and water permeability. The speed of water penetration and oxygen penetration of the coating is often higher than the speed of corrosion consumption of water and oxygen on the exposed steel surface. It is impossible for the coating to achieve a complete shielding effect. After the layer is coated, its strength gradually weakens as time goes on, resulting in a gradual deterioration of the protection for the internal metal.

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