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Acid pickling treatment device and method used before steel pipe epoxy powder spraying

A technology of epoxy powder and treatment device, which is applied in the field of pipeline spraying, can solve the problems of easy rusting of steel pipes, affecting the anti-cathodic disbonding effect of the final coating, etc.

Active Publication Date: 2017-10-24
SHANGHAI HILONG ANTI CORROSION TECH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the steel pipes in the prior art that are easy to rust after spraying acid in the steel pipe pretreatment chamber and affect the anti-cathode stripping effect of the final coating

Method used

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  • Acid pickling treatment device and method used before steel pipe epoxy powder spraying

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Experimental program
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Effect test

Embodiment 1

[0016] A specific implementation steps of pickling treatment before epoxy powder spraying of steel pipes:

[0017] Firstly, the steel pipe conveying device conveys the steel pipe 7 to the pickling bin 1 and sprays acid through the low-pressure acid spray pipe 4 for sufficient acid spray;

[0018] Secondly, after the steel pipe 7 has been sprayed with the above-mentioned acid liquid, it is then transferred to the high-pressure flushing chamber 2 by the steel pipe conveying device and fully cleaned with pure water to remove the residual acid liquid on the surface of the steel pipe 7;

[0019] Finally, the cleaned steel pipe 7 in the high-pressure flushing chamber 2 is transferred to the air-drying chamber 3 by the steel pipe conveying device and dried by the air-drying air knife assembly 6, that is, the pretreatment process is completed.

[0020] Pass the derusted steel pipe 7 through the steel pipe transmission device, first pass through the pickling chamber 1 for acid spraying...

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Abstract

The invention discloses an acid pickling treatment device and method used before steel pipe epoxy powder spraying. The device comprises a steel pipe conveying device, an acid pickling bin, a high-pressure washing bin and an air-drying bin. The method includes the steps that a steel pipe passes the acid pickling bin firstly for acid liquor spraying, reaches the high-pressure washing bin for pure water cleaning and finally reaches the air-drying bin for air drying through the conveying device, water left on the surface is removed, and therefore it is guaranteed that the surface of the steel pipe is completely acid-pickled and does not re-rust. The acid pickling treatment device and method have the beneficial effects that the acid pickling treatment device used before steel pipe epoxy powder spraying can control the acid pickling process, the washing process and the air-drying process, operations are independent and do not affect one another, the surface of the steel pipe is prevented from re-rusting, and the acid pickling quality is guaranteed.

Description

technical field [0001] The invention relates to the field of pipeline spraying, in particular to a steel pipe epoxy powder pickling treatment device and treatment method before spraying. Background technique [0002] In the pipeline external coating industry, the bottom epoxy powder coating plays a vital role in the entire anti-corrosion system. To evaluate the corrosion resistance of epoxy powder coatings, the most important indicator is cathodic disbondment; as the environment of pipelines becomes more and more harsh, the requirements for cathodic disbondment of coatings are also getting higher and higher. In long-term production and application, the treatment process before spraying the surface of the steel pipe is relatively simple. Usually, the steel pipe is placed in a warehouse for pretreatment. The pretreatment chamber includes two parts: acid spray and pure water cleaning. Knife blow dry. Acid spraying and pure water cleaning are placed in the same warehouse, and ...

Claims

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Application Information

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IPC IPC(8): C23G3/04
CPCC23G3/04
Inventor 廖青云谢挺陆清一
Owner SHANGHAI HILONG ANTI CORROSION TECH ENG
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