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Coating method for internally coating pipe with clinkering epoxy graphene powder

A technology of graphene powder and sintered epoxy, which is applied to the device, coating, pretreatment surface and other directions of coating liquid on the surface. Demand, the inner wall of buried metal pipelines are not very good in corrosion resistance, etc., to achieve the effects of easy control of coating quality, good chemical resistance, and excellent impact resistance.

Inactive Publication Date: 2017-11-24
武汉中电节能有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the atlas of relevant national technical specifications does not have a good technical definition for the anti-corrosion of the inner wall of buried metal pipelines, and does not solve the problem of anti-corrosion of the inner wall of buried metal pipelines.
But now the scale of the project is increasing, the requirements for technology and project quality are higher, and the needs of buried pipelines for heating, water supply, gas supply, sewage discharge, life and industry are increasing. The original anti-corrosion methods and performance cannot meet the project requirements.

Method used

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  • Coating method for internally coating pipe with clinkering epoxy graphene powder
  • Coating method for internally coating pipe with clinkering epoxy graphene powder

Examples

Experimental program
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Effect test

Embodiment 1

[0032] refer to figure 1 , a method for coating the inside of a pipeline with fused-bonded graphene epoxy powder, using an internal spraying method, is suitable for coating the inner wall of a pipeline with a relatively large aperture, and specifically includes the following steps:

[0033] (1) Preheat the steel pipe 01 to remove surface impurities and loosen scale.

[0034] (2) The internal sand blasting treatment process is adopted to make the steel pipe reach a metallic white color, and the anchor pattern controls the depth

[0035] Control it at 45-95um, and then remove the dust on the surface.

[0036] (3) The surface-treated steel pipe 01 is uniformly heated by a non-polluting heat source, preferably using an intermediate frequency coil to heat the steel pipe 01. The heating temperature can be adjusted according to the production speed, the thickness of the pipe wall, and the desired gelling and curing time of the coating. Control it between 280-470°C, preferably 350°C...

Embodiment 2

[0042] see figure 2 , a method for coating the interior of a pipeline with fused-bonded graphene epoxy powder, adopts a vacuum suction coating method, and is used for coating the inner walls of smaller-diameter pipelines and elbows, specifically comprising the following steps:

[0043] (1) preheating pipeline 2, remove surface debris, loose scale;

[0044](2) Adopt the internal sand blasting treatment process to make the steel pipe reach the metallic white color, control the depth of the anchor pattern at 45-95um, and then remove the dust on the surface;

[0045] (3) The surface-treated steel pipe is uniformly heated by a non-polluting heat source and controlled between 280-470°C;

[0046] (4) Vacuum suction coating method is adopted to make compressed air enter the pipe 2 from one side through the fluidized bed 1. After the powder is mixed with the air, it melts and adheres to the surface of the pipe wall when it contacts with the high-temperature pipe wall, and the pipe 2 ...

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Abstract

The invention discloses a coating method for internally coating a pipe with clinkering epoxy graphene powder. The coating method comprises the following specific steps that (1), the steel pipe is preheated, surface impurities are removed, and oxide skin is loosened; (2), an inner sandblasting process is adopted, the steel pipe reaches the metal white, the anchor pattern control depth is controlled to be within the range of 45-95 micrometers, and then surface dust is removed; (3), the steel pipe obtained after surface treatment is completed is uniformly heated with a pollution-free heat source; (4), the epoxy graphene powder is fully fluidized in a fluidization bed firstly; (5), the leveled coating is further gelled and cured; (6), after the overall temperature drops, watering cooling is performed; and (7), when the temperature drops below 150 DEG C, coating film performance detection is performed. According to the coating method for integrally coating the pipe with the clinkering epoxy graphene powder, pipe inner wall coating is more thorough, the anticorrosion coating covering is more uniform, the formed anticorrosion coating can effectively resist the chemical corrosion of organic matter and has the good insulativity, and the anticorrosion time is long.

Description

【Technical field】 [0001] The invention relates to the technical field of anti-corrosion technology for a medium contact layer on the inner wall surface of buried metal pipelines, in particular to a coating method for coating fusion bonded epoxy graphene powder inside a pipeline. 【Background technique】 [0002] At present, the relevant national technical specification atlas does not have a good technical definition for the anti-corrosion of the inner wall of buried metal pipelines, and does not solve the problem of anti-corrosion of the inner wall of buried metal pipelines. But now the scale of the project is increasing, and the requirements for technology and project quality are higher. The buried pipeline heating, water supply, gas supply, sewage discharge, domestic and industrial needs are increasing, and the original anti-corrosion methods and performance cannot meet the engineering needs. The quality and life of buried metal pipelines directly affect the entire project, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/22B05D3/00B05D3/02B05D1/12B05D1/06B05D7/24
CPCB05D1/06B05D1/12B05D3/002B05D3/0218B05D7/222B05D7/24
Inventor 李洋阚磊
Owner 武汉中电节能有限公司
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