Oil separation prime coat for long-acting anti-corrosion system and preparation method thereof

Abstract

The invention discloses an oil separation prime coat for a long-acting corrosion prevention system and a manufacturing method thereof, belongs to the technical field of surface engineering, can be used for a multi-layer coating corrosion prevention system, is high in curing speed and short in construction interval, and can meet the process requirements of multi-pass construction. The cured coatingis good in flexibility and can be tightly combined with the soft outer surface of the anti-corrosion belt, a compact flexible coating is formed on the outer layer of the anti-corrosion belt, the oilseparation effect is achieved, leakage and loss of anti-corrosion components at the bottom are effectively prevented, and the long-term anti-corrosion effect is guaranteed; the oil separation prime coat has excellent adhesion to the surface of a steel structure, has excellent adaptability to a next coating, can not fall off for a long time in a frequent micro-vibration environment of a steel structure facility, and can completely meet the long-acting requirement of a multi-layer coating anti-corrosion system; the oil separation prime coat is not easy to erode by mould, the corrosion resistanceis outstanding, and the problem that the steel surface of the epitaxial part of the corrosion prevention area in the multi-layer coating corrosion prevention system is easy to corrode can be solved;and the coating has an anti-corrosion self-repairing function.

Description

technical field [0001] The invention relates to the technical field of surface engineering, in particular to an oil-separating primer for long-acting anticorrosion systems and a manufacturing method thereof. Background technique [0002] In recent years, steel structure anticorrosion, especially the anticorrosion method of steel structure joints, has been a hot research topic in the field of steel structure protection. Some of the schemes have also achieved good economic benefits due to the corrosion problems faced by them. [0003] At present, the anti-corrosion schemes of steel structures that are widely used are roughly divided into coating anti-corrosion and sacrificial anode anti-corrosion. Coating anti-corrosion has no obvious protective effect on some steel structure parts with sharp-angled surfaces, such as steel structure connection points, flange valves, etc. There may even be a problem of protection failure; in addition, for some steel structure facilities such a...

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Problems solved by technology

Chinese patent CN102127770 B discloses a coating anti-corrosion method for the connection parts of steel structures. The scheme is a multi-layer coating anti-corrosion system. In direct contact with the surface of the steel structure in the extension part, there is leakage and loss of anti-corrosion components, and the surface of the steel structure in the extension part is corroded again; There is also leakage and loss of anti-corrosion components, and the surface of the steel structure in the extension part is corroded again

[0005] Chinese patent CN 103305849B introduces an oxidative polymerization type anticorrosion method. In this scheme, an adhesive with a certain film thickness is painted on the outside of the corrosion protection tape layer. The adhesive is a water-based acrylic paint, and the combination with the corrosion protection tape is still Yes, but after a period of time, it is found that there are different degrees of corrosion and mold growth on the surface of the coating on the part directly bonded to the steel surface of the extension part of the anti-corrosion area, and the corrosion problem of the extension part of the multi-layer coating anti-corrosion system cannot be solved; the patent CN105949890B provides a coated transmission line outdoor device and its coating method. In this scheme, the surface of the anti-corrosion belt layer is also coated with a protective agent, and a protective shell layer is made on the surface of the protective agent coating. The protective agent It is also a water-based acrylic paint, which has average adhesion to metal surfaces and poor fungal corrosion resistance. Although it improves the sealing problem that is easy to occur when the shell is directly manufactured, it also fails to solve the corrosion of the extension part of the multi-layer coating anti-corrosion system. question

[0006] The above-mentioned schemes have been promoted in a certain range, such as steel pipe pile protection of port wharf bridges, node site protection of large steel structures, flange valve protection and other fields. The long-term anti-corrosion effect has also been recognized by the majority of owners, but Secondary problems also appeared after the completion of the project. The main points are as follows: First, the multi-layer coating anti-corrosion scheme directly manufactures the shell outside the anti-corrosion belt. Sealability, so that after a period of time, there will be leakage of anti-corrosion components, which will affect the anti-corrosion effect; In general, when the shell is made, it is directly bonded and attached to this area of ​​the steel structure surface, but the steel structure surface at the bottom is not treated for anti-corrosion, so it is easy to corrode again in this part

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