Double-coating steel tube

A double-coated, steel pipe technology, applied in the direction of pipes, rigid pipes, pipeline protection, etc., can solve the problems of affecting the service life of steel pipes, reducing the corrosion resistance, and reducing the corrosion resistance of epoxy resin coated steel pipes, etc.

Inactive Publication Date: 2013-08-21
NINGBO KEXIN CORROSION CONTROL ENG
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Problems solved by technology

[0003] However, the coating may be damaged during hoisting, processing, handling and binding of epoxy resin-coated steel pipes. Once the epoxy coating is damaged, the corrosion resistance will be reduced, which will directly affect the service life.
In addition, when coating epoxy coatings, there are unavoidably leaky micropores, which will also reduce the corrosion resistance and affect the service life of steel pipes.
Although repair measures can be taken to overcome the adverse effects caused by coating damage and missing coating micropores, repair measures cannot completely eliminate the adverse effects of reducing the corrosion resistance of epoxy resin-coated steel pipes and shortening the service life of buildings. It is necessary to take more effective measures to completely overcome the adverse effects caused by coating damage and leak coating micropores, and ensure the service life of epoxy coated steel pipes

Method used

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  • Double-coating steel tube

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Embodiment Construction

[0010] Double-coated steel pipe structure as attached figure 1 shown. The outer surface of the base steel pipe 1 is sequentially coated with the zinc layer 2 as the bottom layer and the epoxy coating 3 as the surface layer, and the steel pipe 1, the bottom layer zinc layer 2 and the surface layer epoxy coating 3 are respectively bonded together, Composed of zinc, epoxy double-coated steel pipe.

[0011] The processing method of the present invention is as follows: spray liquid metal zinc on the surface of a clean substrate steel pipe by thermal spraying method to form a bottom zinc layer with a thickness of 100-200 μm; spray epoxy powder coating after spraying the zinc layer, The thickness of the epoxy coating on the surface layer is 200-800 μm. The bottom zinc layer and the surface layer epoxy coating are bonded together to form a zinc and epoxy double coating, and the zinc and epoxy double coating together with the base steel pipe form a zinc and epoxy double coating steel...

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Abstract

The invention provides a zinc and epoxy double-coating steel tube and the processing process of the double-coating steel tube. According to the double-coating steel tube, a bottom zinc layer is arranged on a base material steel tube in a thermal spraying mode, then a surface epoxy coating is arranged on the zinc layer in an electrostatic spraying mode, and finally the zinc and epoxy double-coating steel tube is formed. The zinc layer used by the double-coating steel tube can effectively eliminate bad effects caused by the damage and the defects of the epoxy coating, the corrosion resistant capacity of the double-coating steel tube is guaranteed better, and the service life of the double-coating steel tube is guaranteed better.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, in particular to zinc and epoxy double-coated steel pipes and a processing method thereof. technical background [0002] Epoxy resin coated steel pipe is a kind of coated steel pipe produced by spraying epoxy resin powder on the surface of steel pipe by electrostatic spraying method. Because epoxy resin powder coating is one of the anti-corrosion coatings with the best anti-acid and alkali properties among many coating materials, it can effectively block corrosive substances, and the steel pipe coated with epoxy resin powder coating on the surface has a significantly improved corrosion resistance. , effectively extend the life of the building. Through electrostatic spraying technology, an epoxy coating that is uniform, dense and firmly bonded to steel bars is formed. Compared with other anti-corrosion measures, it has the most technical, performance and cost advantages. Therefor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147F16L58/08
Inventor 吴金岳
Owner NINGBO KEXIN CORROSION CONTROL ENG
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