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Corrosion control method of welding bead and melting loss portion

A technology of burn-out and weld bead, applied in the direction of pretreatment surface, device for applying liquid to the surface, coating, etc., can solve the problems of bottom penetration, rust return, inability to meet the requirements of on-site construction, etc., and achieve high construction efficiency , the effect of small environmental pollution

Inactive Publication Date: 2013-03-27
中石化胜利油建工程有限公司
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AI Technical Summary

Problems solved by technology

The use of traditional construction methods has been far from meeting the requirements of on-site construction
The general conventional treatment method is far from the effect of the overall spraying, especially where the weld bead treatment is often not done properly, resulting in common quality problems such as bottoming out and rust returning.

Method used

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  • Corrosion control method of welding bead and melting loss portion

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Embodiment Construction

[0016] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0017] Taking the anti-corrosion treatment of the weld bead and burnt part of the tank plate as an example, figure 1 It is a flow chart of the anti-corrosion method of the welding bead and burnt part of the present invention. In step 101, the tank plate is shot blasted and derusted on the production line of the prefabricated anticorrosion workshop, and the process enters step 102.

[0018] In step 102, the weld bead is protected immediately after the tank plate is subjected to shot blasting. In one embodiment, the weld bead is protected by adhesive tape, the width of which is larger than the heat-affected zone of the weld bead, generally 5 cm. The process goes to step 103.

[0019] In step 103, the tank plate is sprayed with a primer. After t...

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Abstract

The invention provides a corrosion control method of a welding bead and a melting loss portion. The corrosion control method includes: performing impeller blasting on a tank shell; protecting a welding bead of the tank shell; spraying primer on the tank shell; installing a tank body through the tank shell; repainting primer on the welding bead and the melting loss portion of the tank body; performing integral cleaning and galling treatment on the surface of the tank body; and performing integral painting on the tank body. The corrosion control method solves the problem that when integral painting cannot be performed, bottom penetration, rust back and other quality defects can be caused on the welding bead treated portion due to incomplete treatment, and has the advantages of being good in anti-corrosion quality, high in construction efficiency and small in pollution to the environment.

Description

technical field [0001] The invention relates to anti-corrosion technology, in particular to an anti-corrosion method for weld bead and burnt part. Background technique [0002] The traditional tank anticorrosion technology is generally carried out after the overall installation of the tank body. First, sandblasting and rust removal operations are carried out, and then the overall spraying operation is carried out. However, this traditional anti-corrosion construction method is only suitable for projects with looser construction period requirements and lower environmental protection requirements. As the integration of the project and the surrounding environment becomes closer and closer, the owner's construction period requirements are generally very tight. In many places, it is almost impossible to achieve the overall sandblasting and derusting operation on the construction site. One is that it cannot meet the requirements of environmental protection, and the other is that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/00B05D1/38B05D1/32B05D3/00B24C1/00B24B27/033
Inventor 王允汪伟章荣胜李赛君
Owner 中石化胜利油建工程有限公司
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