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Field patching method after damage of zinc coating of in-service power transmission tower

A technology for on-site repairing and transmission towers, which is applied to coatings, devices for coating liquid on the surface, and surface pretreatment, etc. It can solve problems such as reducing the service life of iron towers and affecting the corrosion resistance of iron towers, and achieves strong adhesion. Good film effect, no aging effect

Inactive Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

[0002] At present, when analyzing the material of lightning rod towers in power systems, the galvanized layer must be removed. After the galvanized layer is damaged, most of them are treated with anti-rust paint or not. The damaged surface will affect the corrosion resistance of the tower. Reduce the service life of the tower

Method used

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Embodiment Construction

[0019] Embodiments of the present invention are described in further detail below,

[0020] A method for on-site repairing after the galvanized layer of an in-service transmission tower is damaged, the method includes the following steps:

[0021] (1) Surface polishing treatment: Use a micro-generator to generate electricity on site, the generator drives an angle grinder, and use the angle grinder to oxidize the surface of the galvanized angle steel, remove the corrosion layer, remove rust and oxidation spots, and expose the metallic luster to the metal material;

[0022] ⑵Surface refinement treatment: Use a grinder to use 80# sandpaper discs for preliminary refinement treatment, and then use a grinder to use 200#, 400#, 600# sandpaper to grind gradually from coarse to fine to a mirror surface; after replacing the sandpaper When changing the sandpaper, rotate the sanding direction 90 degrees so that the new grinding marks and the old grinding marks are perpendicular to each ot...

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Abstract

The invention relates to a field patching method after damage of a zinc coating of an in-service power transmission tower. The field patching method comprises the following steps of: (1) surface polishing treatment of using an angle grinder to oxidize a surface of angle steel which damages the zinc coating and removing a corrosive layer, rusty spots and oxidized spots to expose metallic luster of a metal material; (2) surface refining treatment of using an abrader to grind the surface gradually with abrasive paper from coarse to fin until the surface is like a mirror surface; (3) surface cleaning and drying of cleaning the surface by using a cotton ball containing absolute ethyl alcohol to remove sand particles and dust on the surface, then using acetone to wipe the surface, and removing oil grease to enable the surface to be dried rapidly; (4) spraying Subaru cold galvanized coating until a thickness of a film is up to 80-100 microns; and (5) finishing drying. As the method is used for dealing with the damaged zinc coating, good film-forming effects of the Subaru cold galvanized coating, strong adhesive force and no aging and fracturing phenomenon are achieved, and an original service life of a lightning rod tower is kept.

Description

technical field [0001] The invention belongs to the technical field of metal electroplating layer treatment, in particular to an on-site repair method after the galvanized layer of an in-service power transmission tower is damaged. Background technique [0002] At present, when analyzing the material of lightning rod towers in power systems, the galvanized layer must be removed. After the galvanized layer is damaged, most of them are treated with anti-rust paint or not. The damaged surface will affect the corrosion resistance of the tower. Reduce the service life of the tower. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a field repair method after the galvanized layer of an in-service transmission tower is damaged. [0004] The present invention solves its technical problem and realizes by taking the following technical solutions: [0005] A method for on-site repairing after the gal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D3/12B05D3/10
Inventor 陈韶瑜马崇
Owner STATE GRID CORP OF CHINA
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