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Carbon nanotube modified conductive anticorrosive paint used for grounding grids, and preparation method thereof

A carbon nanotube modification and conductive anti-corrosion technology, which is applied in the direction of anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc. It is difficult to achieve the conductive effect and other problems, and achieve the effect of strong adhesion, stable conductivity and low resistivity

Active Publication Date: 2014-03-26
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for granular nano-magnetic iron oxide to form a three-dimensional mesh conductive network in the epoxy matrix, so it is difficult to achieve the ideal conductive effect during preparation of the coating. In addition, no other anti-corrosion filler components are added to the coating. Can not achieve the expected anti-corrosion effect
[0008] It can be seen that the existing conductive anti-corrosion coatings are difficult to meet the stringent requirements of the grounding grid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The carbon nanotube modified conductive anti-corrosion coating for the grounding grid includes the following components: 50g of epoxy resin F51, 10g of n-butanol, 10g of xylene, 5g of carbon nanotubes, 15g of zinc phosphate, 2g of BYK2070, and fumed silica 3g, 5g of diethylenetriamine. The carbon nanotubes have a diameter of 40-45 nm and a length of 5-8 μm.

[0024] First, mix epoxy resin F51 with n-butanol and xylene evenly, then add carbon nanotubes, zinc phosphate, BYK2070 and fumed silica into the diluted epoxy resin F51, and use a disperser for high-speed stirring to mix evenly , and then use a three-roll mill to grind and disperse the filler evenly, and finally add diethylenetriamine and stir evenly to obtain the carbon nanotube modified conductive anti-corrosion coating for the grounding grid.

Embodiment 2

[0026] The carbon nanotube modified conductive anti-corrosion coating for the grounding grid includes the following components: 55g of epoxy resin F44, 5g of n-butanol, 15g of benzyl alcohol, 6g of carbon nanotubes, 11g of iron oxide red, 2g of Deqian 923S, organic Bentonite 2g, diethylenetriamine 4g. The carbon nanotubes have a diameter of 50-55 nm and a length of 7-10 μm.

[0027] First, mix epoxy resin F44 with n-butanol and benzyl alcohol evenly, then add carbon nanotubes, iron oxide red, Deqian 923S and organic bentonite to the diluted epoxy resin F44, and use a disperser for high-speed mixing uniform, then use a three-roll mill to grind and disperse the filler evenly, and finally add diethylenetriamine and stir evenly to obtain the carbon nanotube modified conductive anti-corrosion coating for the grounding grid.

Embodiment 3

[0029] The carbon nanotube modified conductive anti-corrosion coating for the grounding grid includes the following components: 60g of epoxy resin E44, 25g of toluene, 6g of carbon nanotubes, 15g of calcium fluorophosphate, 2g of Deqian 923S, 3g of organic bentonite, diethylene triethylene Amine 5g. The carbon nanotubes have a diameter of 55-60 nm and a length of 10-15 μm.

[0030] First, mix epoxy resin E44 and toluene evenly, then add carbon nanotubes, calcium fluorophosphate, Deqian 923S and organic bentonite to the diluted epoxy resin E44, use a disperser to mix evenly at high speed, and then use three Roller grinder grinds and disperses the filler evenly, and finally adds diethylenetriamine and stirs evenly to obtain the carbon nanotube modified conductive anti-corrosion coating for the grounding grid.

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Abstract

The invention provides a carbon nanotube modified conductive anticorrosive paint used for grounding grids, and a preparation method thereof. The carbon nanotube modified conductive anticorrosive paint comprises following ingredients, 40 to 60 parts of epoxy resin, 15 to 25 parts of an epoxy resin diluent, 4 to 6 parts of carbon nanotube, 10 to 15 parts of an antirust agent, 2 to 5 parts of an auxiliary agent, and 4 to 5 parts of a curing agent. The preparation method comprises following steps: epoxy resin and the epoxy resin diluent are mixed uniformly; carbon nanotube, the antirust agent, and the auxiliary agent are added into diluted epoxy resin; and an obtained mixture is mixed uniformly, the curing agent is added, and an obtained mixed is stirred uniformly so as to obtain the carbon nanotube modified conductive anticorrosive paint. According to the carbon nanotube modified conductive anticorrosive paint, carbon nanotube is taken as a conductive filler, so that length-diameter ratio of the carbon nanotube is relatively large, a three dimensional conductive network is formed in the carbon nanotube modified conductive anticorrosive paint, the three dimensional conductive network is filled with resin matrix, and excellent electrical conductivity is obtained by adding a small amount of the conductive filler. Coatings obtained via spraying and coating of the carbon nanotube modified conductive anticorrosive paint are low in resistivity, stable in conductivity, high in corrosion resistance and flexibility, and are excellent in adhesive force; and are compact.

Description

technical field [0001] The invention relates to a conductive anticorrosion coating, in particular to a carbon nanotube modified conductive anticorrosion coating for a grounding grid and a preparation method thereof. Background technique [0002] The metal of the grounding grid is directly buried in the soil, which is easily damaged by electrochemical corrosion, or even breaks, which reduces the leakage capacity of the entire grounding grid, thus endangering the safe operation of the ground equipment. [0003] In order to prevent the corrosion of the grounding grid, galvanized steel is often used instead of the traditional carbon steel as the grounding body. Since the electrode potential of zinc is -0.77V, the electrode potential of iron is -0.44V, and the galvanized layer is thin, and the thickness of the coating is generally only tens of microns. In the soil with complex environment, zinc and iron form a corrosion primary battery. It is easy to corrode the galvanized layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/24C09D5/08
Inventor 王利民孟晓明陈思敏吴昊祝郦伟
Owner STATE GRID CORP OF CHINA
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