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Graphene coating material used for prevention of boiler four tube high temperature corrosion, and preparation method thereof

A high-temperature corrosion and coating material technology, used in anti-corrosion coatings, coatings, alkali metal silicate coatings, etc., can solve the problems of high construction cost and short anti-corrosion life, and achieve excellent anti-corrosion ability and good resistance corrosion resistance and good adhesion

Inactive Publication Date: 2019-06-18
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a graphene coating material and a preparation method thereof for the high-temperature corrosion prevention of four boiler tubes, aiming at solving the short corrosion resistance life of existing alloy coating materials , the problem of high construction cost

Method used

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  • Graphene coating material used for prevention of boiler four tube high temperature corrosion, and preparation method thereof
  • Graphene coating material used for prevention of boiler four tube high temperature corrosion, and preparation method thereof
  • Graphene coating material used for prevention of boiler four tube high temperature corrosion, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Raw material ratio: 50.0g of modified dihydrogen phosphate binder, 5.0g of nano-material dispersion slurry, 18.0g of flake graphite as flake filler, 2.0g of flake nano-material graphene, 15.0g of heat-resistant and anti-corrosion pigment zinc oxide, anti-corrosion Precipitating agent rectorite 2.0g, water 8.0g. The composition of the nanomaterial dispersion slurry is 1.0 g of nano silicon dioxide, 1.0 g of 3-aminopropyltriethoxysilane, and 3.0 g of water.

[0039] Preparation steps such as figure 1 Shown:

[0040] 1. Preparation of nano-material dispersion slurry: take part of water and nano-silica and stir evenly, and gradually raise the temperature to 40°C under stirring conditions, add dropwise dispersant 3-aminopropyltriethoxysilane, and stir for 1 hour Finally, make up the remaining water, and filter the material after cooling completely to obtain the nanomaterial dispersion slurry.

[0041] 2. Coating preparation: Take part of water, anti-sedimentation agent re...

Embodiment 2

[0046] Raw material ratio: modified dihydrogen phosphate binder 30.0g, nano material dispersion slurry 5.0g, flake filler mica 19.0g, flake nano material graphene 1.0g, heat-resistant and anti-corrosion pigment zinc oxide, zinc phosphate, poly Aluminum polyphosphate 5.0g each, anti-sedimentation agent cellulose 0.5g, water 29.5g. The nano-material dispersion slurry is composed of 0.8 g of nano-alumina, 0.2 g of nano-aluminum powder, 1.0 g of γ-(2,3-glycidoxy)propyltrimethoxysilane, and 3.0 g of water.

[0047] Preparation steps such as figure 1 Shown:

[0048] 1. Preparation of nano-material dispersion slurry: Take part of the water and nano-alumina and stir evenly, and gradually raise the temperature to 60°C under stirring conditions, and add the dispersant γ-(2,3-glycidyloxy)propyl trimethyl dropwise Oxysilane, stirred and reacted for 2 hours, supplemented with water, and after complete cooling, filtered out to obtain nanomaterial dispersion slurry.

[0049] 2. Coating pr...

Embodiment 3

[0054] Raw material ratio: 35.0g of modified alkali metal silicate binder, 8.0g of nano-material dispersion slurry, 15.0g of flake graphite and 5.0g of mica flakes as flake filler, 5.0g of flake nano-material graphene, heat-resistant and anti-corrosion pigment Zinc phosphate, aluminum polyphosphate 5.0g each, anti-sedimentation agent rectorite and cellulose 1.0g each, water 20.0g. The composition of the nano-material dispersion slurry is 1.6 g of nano-titanium oxide, 1.6 g of γ-(methacryloyloxy)propyltrimethoxysilane, and 4.8 g of water.

[0055] Preparation steps such as figure 1 Shown:

[0056] 1. Preparation of nano-material dispersion slurry: Take part of the water and nano-titanium oxide and stir evenly, and gradually raise the temperature to 80°C under stirring conditions, add the dispersant-(methacryloyloxy)propyltrimethoxysilane dropwise, After stirring and reacting for 1.5 hours, make up the remaining water, filter and discharge the material after complete cooling t...

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Abstract

The invention discloses a graphene coating material used for prevention of boiler four tube high temperature corrosion, and a preparation method thereof. The graphene coating material used for prevention of boiler four tube high temperature corrosion comprises, by mass, 30-65% of a high temperature resistant adhesive, 1-10% of a nanometer material dispersed slurry, 5-20% of a scale filler, 1-5% ofa sheet-shaped nanometer material, 5-30% of a heat resistant anticorrosive pigment, 0.5-5% of an anti-settling agent, and 0-50% of water. The graphene coating material is prepared using a special preparation method, homogenization effect is better, and storage is stable; the graphene coating material is excellent in high temperature resistance, is compact, possesses excellent corrosion resistancein corrosive atmosphere, and good adhesion on metal substrate; and in addition, the construction method of the graphene coating material is simple and rapid, and the engineering cost can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular to a graphene coating material used for high-temperature corrosion pre-protection of four boiler tubes and a preparation method thereof. Background technique [0002] The bursting of the four tubes (water wall tubes, economizer tubes, superheater tubes, and reheater tubes) of thermal power plant boilers has always been one of the main reasons that affect the safety and stability of power plants and cause huge economic losses. According to statistics, the unplanned outage accidents caused by four pipe bursts account for more than 60% of all unplanned outages in power plants. [0003] In the past, a large amount of research work believed that the main cause of the tube burst was the short-term overheating of the tube and the long-term overheating operation, as well as the corrosion of the complex corrosive atmosphere inside the furnace. In view of the above problems, the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D1/04C09D1/00C09D5/10C09D7/61C09D7/62C09D7/63
Inventor 李太江刘立营李巍
Owner XIAN THERMAL POWER RES INST CO LTD
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