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Coating for delaying corrosion of power system earth mat and preparation method of coating

A power system and coating technology, which is applied in the anti-corrosion coating and preparation field of the power system grounding grid, can solve the problems of polymer anti-aging performance to be improved, uneven protection area, unstable conductivity, etc., and achieve improvement The effect of safe operation guarantee level, long-term stability and good applicability

Inactive Publication Date: 2013-11-27
张华 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional corrosion protection methods for grounding grids include the use of copper materials, cathodic protection, and filling the periphery with bentonite containing corrosion inhibitors. These methods all have the problems of complex technology, uneven protection area, or high cost
Britain, the United States and other countries also use anti-corrosion conductive coatings. The main components include nickel powder, graphite powder, etc., but from the practical results, the problem of unstable conductivity is prone to occur.
There are also attempts to use nano-carbon as a filler and to apply conductive polymers, but the anti-aging properties of polymers need to be improved
In short, the protection technology for the ground grid needs to be solved urgently

Method used

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  • Coating for delaying corrosion of power system earth mat and preparation method of coating
  • Coating for delaying corrosion of power system earth mat and preparation method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Control the temperature at 0~80℃, under stirring at 100~1000rpm, add the designed amount of ethanol, tetraethyl orthosilicate (TEOS) and catalyst in turn into the container, after the initial hydrolysis of TEOS, slowly add a certain amount of γ-ammonia Propyltriethoxysilane, as well as the designed variety and amount of solid particles, after the system is fully mixed, stir the mixture for 0.5~24h to make the mixture react, then stop stirring, let the mixture continue to react for 1~24h to become a sol. The raw material composition and usage amount of each specific sol are entered figure 1 shown.

Embodiment 2

[0019] Immerse the completely pre-treated metal grounding grid profile into any sol in Example 1, stay for a while (about 1~60min), and then smoothly move it from the The sol is extracted from the sol, and as the solvent volatilizes, the sol gels on the surface of the profile to form a film. Put it in the air at 0~60℃ and 80% relative humidity and fully dry it for 10min~4h, then transfer it to the heating furnace, under the protection of nitrogen atmosphere, control the heating rate at 5℃ / min, up to 125℃, and keep it warm 30min, then cool naturally.

[0020] The purpose of profile pretreatment is to completely remove the dirt and oxides attached to its surface and activate it. The main treatment methods include solvent degreasing, necessary pickling and cleaning steps, which can generally be carried out in accordance with the common methods of surface pretreatment of metal parts.

Embodiment 3

[0022] Coating methods can also be achieved by spraying, spin coating and brushing. The choice of coating method depends on the structure of the profile.

[0023] Spraying is suitable for structures that cannot be moved. When spraying, any sol in Example 1 is placed in the spray gun, and the compressed air with a pressure of 0.2~1.0MPa is used as the carrier gas. Spray on the surface of the structural parts that have been completely pre-treated, dry in the air for 10-20 minutes, spray the second layer as needed and repeat 3-4 times, and then put it in the air at 0-60 ℃ and 80% relative humidity for 10 minutes-4 hours After fully drying, use a local heating device to make the workpiece under the protection of nitrogen atmosphere, control the heating rate at 5°C / min, up to 125°C, keep it warm for 30min, and then cool it naturally.

[0024] Spin coating is suitable for flat profiles. When performing spin coating, fix the fully pretreated workpiece horizontally on the rotating de...

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Abstract

The invention discloses a coating for delaying the corrosion of a power system earth mat. Sol is prepared from the following raw materials: 0.1-0.6 mol of metal organic compound containing alkoxy, 1.0-4.0 mol of alcoholic solvent, 0.0015 mol of acidity regulator, solid fine particles accounting for 0.1-40 percent of the total mass of a finial coating and 0.001-0.005 mol of catalyst, wherein the metal organic compound containing alkoxyl is a mixture of one or more of ethyl orthosilicate, butyl titanate, tetrabutyl zirconium and gamma-aminopropyltriethoxysilane according to any proportion; the alcoholic solvent is ethanol; and the acidity regulator is acetic acid. The costing is a silicon dioxide-based organic-inorganic compound costing, which can be used for effectively improving the environmental corrosion resistance of an earth mat material, maintaining long-term stability of a material surface, prolonging the fault-free running period of an earth mat system and further raising the safety running level of a power system. As proved by a simulation test piece soil burying acceleration test, the surface state of a test piece is stable basically, and the using requirement can be met.

Description

technical field [0001] The invention relates to an anti-corrosion technology for a grounding grid of a power system, in particular to an anti-corrosion coating for a grounding grid of a power system and a preparation method thereof. Background technique [0002] In the power generation and transformation system, the grounding grid is one of the important basic parts, and its quality is directly related to the safety of equipment, personal and grid operation. According to the analysis, in the safety accidents of the power grid, the accidents caused by the corrosion of the grounding grid material account for a considerable proportion. Therefore, effective control of the corrosion of the grounding grid is of great significance for improving the safety of the power supply system. At present, conventional corrosion protection methods for grounding grids include using copper materials, cathodic protection, and filling the periphery with bentonite containing corrosion inhibitors. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D183/08C09D7/12C09D5/08C09D5/10H01R4/66B05D1/18
Inventor 张华孙阳盛李澄谢邦鹏胡孝昀王加余
Owner 张华
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