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High-temperature-hot-water corrosion resisting coating

A technology of high temperature resistance and coating, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of inconvenient construction and high cost of coatings, and achieve the effects of reduced cost, simple coating process, and reduced costs

Inactive Publication Date: 2013-06-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the main problems of anti-corrosion coatings used in high-temperature hot water are: 1. Most coatings still need to be cured at high temperature, which is inconvenient for construction, represented by epoxy, silicone modified coatings and ceramic coatings; 2. With the increase of high temperature resistance requirements (above 200°C), the cost of general coatings is relatively high, represented by fluorocarbon coatings and other coatings with high-performance resins as film-forming substances; There are few types of water corrosion coatings, and it is necessary to study multi-variety, low-cost, and large-scale practical use value of geothermal water pipeline protective coatings

Method used

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  • High-temperature-hot-water corrosion resisting coating
  • High-temperature-hot-water corrosion resisting coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]A: Weigh 60 parts (hereinafter referred to as mass) of epoxy-modified silicone resin (SMH-30) and add an appropriate amount of diluent (n-butanol: xylene (mass ratio) = 3: 7) to dilute and stir evenly; B : Add 30 parts of mica iron oxide ash, 10 parts of sericite, 3 parts of talcum powder, stir with a strong electric mixer for 15 minutes at high speed, add 0.3 parts of dispersant (DISPERBYK-142), 0.2 parts of disinfectant during stirring Foaming agent (BYK-066N) to obtain component A; C: weigh 6 parts of polyamide curing agent as component B; D: mix components A and B and stir evenly to obtain the coating composition of the present invention .

[0022] Use the above-mentioned paint to brush and paint on the steel plate specified in the national standard to obtain a paint film thickness of 120 μm, and cure it at room temperature (10-40°C) for 48 hours to obtain a smooth and hard coating film. The physical and mechanical properties of the test coating film are shown in Tab...

Embodiment 2

[0025] A: Weigh 60 parts (hereinafter referred to as mass) of epoxy-modified silicone resin (SMH-30), add an appropriate amount of diluent (n-butanol: xylene (mass ratio) = 3:7) to dilute and stir evenly; B: Add 30 parts of mica iron oxide ash, 10 parts of sericite, 3 parts of talcum powder, stir with a powerful electric mixer at high speed for 15 minutes, add 0.3 parts of dispersant (DISPERBYK-142), 0.2 parts of Defoamer (BYK-066N) to obtain component A; C: Weigh 3 parts of T31 curing agent as component B; D: Mix components A and B and stir evenly with a glass rod at a low speed to obtain the present invention coating composition.

[0026] Use the above-mentioned paint to brush and paint on the steel plate specified in the national standard to obtain a paint film thickness of 120 μm, and cure it at room temperature (0-10°C) for 48 hours to obtain a smooth and hard film. The physical and mechanical properties of the test film are as follows:

[0027]

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Abstract

The invention relates to a high-temperature-hot-water corrosion resisting coating, in particular to a corrosion resisting coating containing an epoxy-modified silicone resin. The coating can be applied to the internal wall coating corrosion resistance of a geothermal hot water pipeline, a heat exchanger pipe and a hot water conveying pipeline and comprises a component A and a component B, whereinthe component A consists of the following materials in percentage by mass: 50 to 60 percent of epoxy-modified silicone resin, 22 to 30 percent of mica oxidation iron ash, 9 to 14 percent of sericite,2 to 4.5 percent of talcpowder, 0.2 to 0.5 percent of dispersant and 0.1 to 0.4 percent of defoamer; and the component B comprises 2 to 6 mass percent of curing agent. The coating of the invention has the advantages of curing at normal temperature, high water resistance, high-temperature stability, cost reduction, stable structural performance in geothermal hot water of 120 DEG C and high resistance to high-temperature-hot-water corrosion.

Description

Technical field: [0001] The invention relates to a high-temperature hot water corrosion-resistant coating, in particular to an anti-corrosion coating containing epoxy-modified organic silicon resin, which can be widely used in coating inner walls of geothermal water pipelines, heat exchanger tubes and hot water delivery pipelines antiseptic. Background technique: [0002] With the reduction of recoverable reserves of oil, natural gas and coal resources and the deterioration of the environment, many countries have increased the use of geothermal water, a green and renewable energy. At present, the development and utilization of geothermal water resources in my country is mainly realized through the extraction of geothermal wells, and most of the pipelines use metal pipes. Due to the high temperature of geothermal water and the presence of various corrosive chemical components, pipeline corrosion is a common problem. directly affect the service life of the equipment. After ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/12C09D5/08
Inventor 魏刚王海龙乔宁
Owner BEIJING UNIV OF CHEM TECH
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