Method for increasing adhesion force of paint system by tie coat

Abstract

The invention discloses a method for increasing an adhesion force of a paint system by tie coat, and particularly relates to the technical field of adhesion forces of paint systems. The method for increasing the adhesion force of the paint system by the tie coat comprises the following specific steps of S1, polishing and cleaning; S2, conducting primary spraying; S3, drying; S4, cleaning; S5, conducting secondary spraying; S6, spraying for the third time; S7, spraying for the fourth time; and S8, spraying for the fifth time. According to the method for increasing the adhesion force of the paint system by the tie coat provided by the invention, by adding the epoxy tie coat, the adhesion force of the whole paint system is effectively improved, the occurrence of the phenomenon that a paint film falls off and ages after a jacket is soaked in seawater for a long time is avoided; meanwhile, by adding the epoxy tie coat, the situation that the color of the whole paint system becomes dark is effectively changed, so that the surface of the jacket is bright in color, and the attractiveness is effectively improved; and in addition, due to the fact that the epoxy tie coat is added, the corrosion resistance of the whole paint system is improved, the corrosion resistance life of the paint system is effectively prolonged, and the service life of the jacket is further effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of paint system adhesion, more specifically, the invention relates to a method for increasing the paint system adhesion by means of connecting paint. Background technique [0002] The jacket is composed of a hollow leg column and a vertical and horizontal bar connecting the leg column, and a fixed platform is overlapped on it, which can be used for offshore oil production. Generally speaking, the jacket products include: sliding launching jacket, floating towing conduit Jacket and hoisting jacket and accessories, buoyancy tank, steel piles and water-resisting casing, the jacket steel piles are fixed on the seabed, the jacket is prefabricated on land, then hauled to the sea and placed in place, and then piled along the conduit, The piles are driven one by one, and finally cement slurry is poured into the annular space between the pile and the conduit, so that the pile and the conduit are integrated and fixed ...

AI Technical Summary

Problems solved by technology

[0003] With the deep-water development of offshore oil and gas exploration and development, the application of the jacket platform will become more and more extensive. The original plan of the jacket adopts a paint system, first spraying three layers of epoxy heavy-duty anti-corrosion coatings, and finally spraying aliphatic polyurethane topcoat , but during the construction process, it was found that the aliphatic polyurethane topcoat sprayed on the epoxy heavy-duty anti-corrosion coating had the following two problems: the epoxy heavy-duty anti-corrosion coating was black, while the aliphatic polyurethane topcoat was yellow, and the color of the topcoat after the paint spraying was completed Because the effect of the primer is relatively dark, it cannot achieve the vividness of the signal yellow. Secondly, after the paint is sprayed and the overall coating is cured, an adhesion test is carried out on the paint system. It is found that the adhesion can only reach 3Mpa at most, which cannot meet the requirements. The 5Mpa adhesion requirement in the standard, but when the existing technology has insufficient adhesion, it is necessary to change the overall paint matching and replace the paint type. For the already sprayed rods, it is necessary to re-sandblast and spray new paint. This method will consume a lot of It is a waste of manpower and material resources. If the color of the topcoat cannot reach the required gloss, the thickness of the topcoat needs to be increased, which increases the amount of topcoat used.

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