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Automatic coating process of composite coating of large-size steel pipe

A composite coating and coating process technology, applied in metal material coating process, device for coating liquid on the surface, coating, etc., can solve problems such as harsh environmental conditions, unfavorable energy saving and environmental protection, poor coating effect, etc. Achieves strong corrosion resistance, improved appearance, and thin coating

Active Publication Date: 2011-10-12
SHANGHAI JIANYE TECH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, manual coating contains organic solvents, the coating effect is poor, and requires harsh environmental conditions; the automatic coating process of molten epoxy powder contains a high-temperature medium-frequency heating stage, which consumes a lot of power, which is not conducive to energy conservation and environmental protection

Method used

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  • Automatic coating process of composite coating of large-size steel pipe
  • Automatic coating process of composite coating of large-size steel pipe

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Embodiment Construction

[0015] The automatic coating production line adopted in the automatic coating process of large-scale steel pipe composite coating of the present invention is as figure 1 As shown, the following combination figure 1 The concrete steps of the automatic coating technique of large-scale steel pipe composite coating of the present invention are described as follows:

[0016] First check the appearance of the surface of the construction object (such as steel pipe or other steel structures), and polish and clean the surface with welding bumps, spatters, pinholes, flashes, burrs, welding slag, etc. Fillet of more than 2mm; clean with detergent or solvent to remove grease, grease, soluble salt, rust, scale, etc. and other dirt on the surface of the substrate. The quality of surface treatment is dry, free of dust, grease, dirt, rust and other pollution including soluble salts.

[0017] Then the steel pipe after the surface purification treatment is transported from the pipe inlet plat...

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Abstract

The invention provides an automatic coating process of a composite coating of a large-size steel pipe, comprising the following steps of: surface purification treatment, derusting by sandblast, arc aluminum spray, electrostatic epoxy resin powder spraying, and the like, wherein the thickness of an aluminum coating achieves 80-120 micrometers, and the thickness of an epoxy resin coating achieves 160-220 micrometers. According to the method disclosed by the invention, the composite coating combined by the aluminum coating and the epoxy resin coating is formed on the surface of the large-size steel pipe by combining the arc aluminum spray with the electrostatic epoxy resin powder spraying; the composite coating not only retains the excellent properties of a single coating, but also combines the characteristics of the sealing action of an arc spraying coating and the long-term protection of a cathode, has an anticorrosion coating having high binding power with the surface of the large-size steel pipe, which averagely reaches 12.0 MPa, service life more than 80 years and intermediate-frequency heating step saving, has the advantages of water resistance, impact resistance, weather resistance, environment friendliness, long-term protection, and the like, can achieve the purpose of long-term anticorrosion, also improves the structural appearance and is mainly used for the large-size steel pipe which has higher requirements for anticorrosion.

Description

technical field [0001] The invention relates to steel structure surface anticorrosion, in particular to an automatic coating process for composite coatings of large steel pipes. Background technique [0002] In recent years, with the rapid development of my country's national economy, more and more large-scale steel pipes are used in port terminals, marine engineering and municipal engineering. In order to effectively control the corrosion of large steel pipes, prolong the service life of large steel pipes, and ensure the safe operation of infrastructure, it is necessary to carry out surface anticorrosion treatment on steel pipes. The most commonly used anti-corrosion treatment method is to apply anti-corrosion coatings on the surface of steel pipes, such as manual coating, automatic coating with molten epoxy powder, etc. Among them, manual coating contains organic solvents, the coating effect is poor, and requires harsh environmental conditions; the automatic coating proce...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D3/00B05D3/12C23C4/08C23C4/16C23C4/131
Inventor 宋会军李仁兰张长华李春香
Owner SHANGHAI JIANYE TECH ENG
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