Method for heavy corrosion protection of hot galvanized part for high-voltage electrical equipment

A technology of high-voltage electrical appliances and hot-dip galvanizing, which is applied to the device for coating liquid on the surface, pre-treatment surface, coating, etc. It can solve the problems of easy peeling off of the coating film and poor adhesion, and achieve good bonding and strong adhesion. Strong, easy-to-operate effect

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for heavy-duty anti-corrosion of hot-dip galvanized parts of high-voltage electrical equipment, so as to solve the phenomenon that the coating film is easy to fall off caused by poor adhesion between the existing coating film and the hot-dip galvanizing layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method for heavy-duty anti-corrosion of hot-dip galvanized parts for high-voltage electrical equipment in this embodiment includes the following steps:

[0029] 1) Get the hot-dip galvanized parts to be treated and carry out weak alkali degreasing. The weak alkali degreasing is to use a weak alkaline degreasing solution with a pH value of 10 and a temperature of 60° C. to soak the hot-dip galvanized parts for 8 minutes, Spray water at room temperature for 60s for a water wash, then soak in hot water at 80°C for 20s for a second wash; after checking that there is no oil on the surface, perform surface roughening treatment; the surface roughening treatment is polished with 120# sandpaper to be sprayed surface, and then blow off the surface to be sprayed with clean compressed air;

[0030] Wherein, in the weakly alkaline degreasing liquid, the concentration of the weakly alkaline degreasing agent is 55g / L; the weakly alkaline degreasing agent is composed of the followi...

Embodiment 2

[0035] The method for heavy-duty anti-corrosion of hot-dip galvanized parts for high-voltage electrical equipment in this embodiment includes the following steps:

[0036] 1) Get the hot-dip galvanized parts to be treated and carry out weak alkali degreasing. The weak alkaline degreasing is to use a weak alkaline degreasing solution with a pH value of 9 and a temperature of 70° C. after soaking the hot-dip galvanized parts for 5 minutes, and then use Soak in water at room temperature for 20s for a water wash, then soak in hot water at 70°C for 40s for a second wash; after checking that there is no oil on the surface, perform surface roughening treatment; the surface roughening treatment is to use 120# sandpaper to polish the surface to be sprayed , and then blow off the surface to be sprayed with clean compressed air;

[0037] Wherein, in the weakly alkaline degreasing liquid, the concentration of the weakly alkaline degreasing agent is 60g / L; the weakly alkaline degreasing ag...

Embodiment 3

[0042] The method for heavy-duty anti-corrosion of hot-dip galvanized parts for high-voltage electrical equipment in this embodiment includes the following steps:

[0043] 1) Get the hot-dip galvanized parts to be treated, and carry out weak alkali degreasing. The weak alkali degreasing is to use a weak alkaline degreasing solution with a pH value of 9.5 and a temperature of 65° C. to soak the hot-dip galvanized parts for 10 minutes, Soak in water at room temperature for 40s for a water wash, then soak in hot water at 60°C for 20s for a second wash; after checking that there is no oil on the surface, perform surface roughening treatment; the surface roughening treatment is to use 120# sandpaper to polish the surface to be sprayed , and then blow off the surface to be sprayed with clean compressed air;

[0044] Wherein, in the weakly alkaline degreasing liquid, the concentration of the weakly alkaline degreasing agent is 65g / L; the weakly alkaline degreasing agent is composed of ...

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Abstract

The invention discloses a method for heavy corrosion protection of a hot galvanized part for high-voltage electrical equipment. The method comprises the following steps that (1) the hot galvanized part to be treated is taken, and weak base degreasing and surface roughening treatment are conducted in sequence; (2) the hot galvanized part obtained after the surface roughening treatment is conducted is taken, epoxy mio barrior paint is sprayed on the surface of the hot galvanized part, leveling and drying are conducted, and a bottom paint layer is formed; (3) sanding processing is conducted on the surface of the bottom paint layer, then weather fastness face paint is sprayed, leveling and drying are conducted, and a face paint layer is formed. The method for heavy corrosion protection of the hot galvanized part for the high-voltage electrical equipment solves the problem of the poor bonding force between a hot galvanized layer and an isolation coating of a black metal part in a heavy protection area, is simple in technology and convenient to operate, improves the qualified rate and the production efficiency of parts and reduces the repair rate and the production cost of the parts. The bonding force between the coating film and the hot galvanized layer of the obtained heavy corrosion protection part is strong, the coating film is not prone to disengagement, the corrosion resisting performance is improved, and the service life of the heavy corrosion protection part in the heavy corrosion protection area is prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface anticorrosion, and in particular relates to a heavy anticorrosion method for hot-dip galvanized parts of high-voltage electrical equipment. Background technique [0002] Hot-dip galvanizing is also called hot-dip galvanizing or hot-dip galvanizing. It is to immerse the rust-removed steel parts in molten zinc liquid, so that the surface of the steel parts is attached with a zinc layer, so as to achieve the purpose of anti-corrosion. The hot-dip galvanized layer is generally above 35 μm, even as high as 200 μm; the covering ability is good, the coating is dense, and there is no organic inclusion. The mechanism of anti-atmospheric corrosion of the galvanized layer includes mechanical protection and electrochemical protection. Under the condition of atmospheric corrosion, the surface of the zinc layer has ZnO, Zn(OH) 2 And basic zinc carbonate protective film, to a certain extent slow down the corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/38B05D3/10B05D3/12C23G1/22
Inventor 张颖杰廉继英张柳丽李宏楼郝留成王路平
Owner STATE GRID CORP OF CHINA
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