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Conductive anticorrosive coating and preparation method thereof

An anti-corrosion coating and coating technology, applied in anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc., can solve problems such as large amount of fillers, resin incompatibility, strict substrate pre-treatment, etc., to improve temperature resistance Anti-combustion performance, improved corrosion resistance, and improved construction process

Active Publication Date: 2013-11-27
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For metal-type conductive coatings, the commonly used silver-filled type has the disadvantage of high cost, and is prone to migration, resulting in a decrease in the conductivity of the coating and resulting in unstable conductivity.
Copper has the danger of polluting the environment. In addition, the potential difference between copper and the carbon steel material of the grounding grid is large, which may easily cause galvanic corrosion of the grounding grid material, resulting in rapid damage to the grounding grid.
Nickel powder is easy to oxidize, and the electrical conductivity decreases after oxidation.
Conductive coatings filled with metal oxides have poor electrical conductivity
Organic conductive polymer coating is a kind of coating with adjustable conductivity, but it is difficult to process and has poor process performance.
The single nano-carbon type conductive coating has a large amount of filler added, and the nano-carbon is not easy to disperse in the coating, and there is a certain incompatibility with the resin; the pretreatment of the substrate is relatively strict, etc.

Method used

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  • Conductive anticorrosive coating and preparation method thereof
  • Conductive anticorrosive coating and preparation method thereof
  • Conductive anticorrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of conductive, anti-corrosion paint, paint film former, pigment and filler and auxiliary agent comprise the following components:

[0045]

[0046]

[0047] The preparation method of the conductive, anti-corrosion coating of the present embodiment is as follows:

[0048] (1) Mix other paint film formers, pigments and fillers, auxiliary components and mixed solvents except epoxy resin curing agent, put them in a paint grinder, stir and grind at a speed of 1850rpm for 15 minutes, then use 200 mesh filter;

[0049] (2) Add epoxy resin curing agent, mix and stir evenly, and get ready.

[0050] The paint of this embodiment was sprayed or brushed onto the surface of the sandblasted carbon steel part by spraying or brushing, and after curing at room temperature for 24 hours, a conductive and anti-corrosion coating with a thickness of 180 μm was obtained.

[0051] The surface resistivity of the coating was 75 Ωcm. Coated Q235 steel was treated at 30°C, 5%NaOH, 5...

Embodiment 2

[0053] A kind of conductive, anti-corrosion paint, paint film former, pigment and filler and auxiliary agent comprise the following components:

[0054]

[0055]

[0056] The preparation method of the conductive, anti-corrosion coating of the present embodiment is as follows:

[0057] (1) Mix other paint film formers, pigments and fillers, auxiliary components and mixed solvents except epoxy resin curing agent, put them in a paint grinder, stir and grind at a speed of 2050rpm for 25 minutes, then use 200 mesh filter;

[0058] (2) Add epoxy resin curing agent, mix and stir evenly, and get ready.

[0059] Spray or brush the paint of this embodiment onto the surface of the sandblasted carbon steel part, and after curing at room temperature for 24 hours, a 200 μm thick conductive and anti-corrosion coating is obtained.

[0060] The surface resistivity of the coating was 80 Ωcm. Coated Q235 steel was treated at 30°C, 5%NaOH, 5%H 2 SO 4 After immersing in 3.5% NaCl solution...

Embodiment 3

[0062] A kind of conductive, anti-corrosion paint, paint film former, pigment and filler and auxiliary agent comprise the following components:

[0063]

[0064]

[0065] The preparation method of the conductive, anti-corrosion coating of the present embodiment is as follows:

[0066] (1) Mix other coating film formers, pigments and fillers, auxiliary components and mixed solvents except epoxy resin curing agent, put them into a coating grinder, stir and grind at a speed of 1500rpm for 25 minutes, then use 200 mesh filter;

[0067] (2) Add epoxy resin curing agent, mix and stir evenly, and get ready.

[0068] The paint of this embodiment was sprayed or brushed on the surface of the sandblasted carbon steel parts by spraying or brushing, and after curing at room temperature for 24 hours, a conductive and anti-corrosion coating with a thickness of 250 μm was obtained.

[0069] The surface resistivity of the coating was 70 Ωcm. Coated Q235 steel was treated at 30°C, 5%Na...

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PUM

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Abstract

The invention discloses a conductive anticorrosive coating and a preparation method thereof. The conductive anticorrosive coating mainly consists of epoxy resin, an epoxy resin curing agent, a composite conductive filler, a preservative, a reactive diluent, a flame retardant and a mixed solvent. The conductive anticorrosive coating provided by the invention is used for preparing a conductive anticorrosive coating layer on the surface of a workpiece well treated in a spray-coating or brush-coating way, and can be widely applied to metal structural elements such as a grounding grid device in the power industry and an oil storing device in the petrochemical industry to realize the functions of electric conducting, electrostatic conducting, anti-corrosion and the like, and therefore, the metal structural elements are capable of meeting the requirements of use on spot. The preparation process of the coating provided by the invention is simple and easy for realization of industrial production.

Description

technical field [0001] The invention belongs to the field of coatings, in particular, the invention relates to a conductive and anti-corrosion coating for a power system grounding grid and a preparation method thereof. Background technique [0002] Substations and line towers are important components of the power system, and the stability of their operation is related to the safe and reliable operation of the power grid and the safety of power transmission and transformation equipment. The grounding device has been in the harsh underground operating environment for a long time, and soil corrosion is inevitable. The main causes of ground grid corrosion are corrosion of micro-batteries, galvanic corrosion, microbial corrosion, and stray current corrosion. [0003] The corrosion protection of the grounding grid mainly starts from two aspects, one is to change the corrosion environment and reduce the corrosion of the environment; the other is to change the corrosion resistance ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/24C09D5/08C09D5/10
Inventor 刘世念王成王文吕旺燕吴航苏伟朱圣龙魏增福王福会付强王群昌
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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