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Nano-modified organic silicon coating with high temperature resistance, corrosion resistance and nuclear radiation resistance as well as preparation and application

An organosilicon coating, nuclear radiation resistance technology, used in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc. and other problems, to achieve the effect of improving compactness, simple preparation process and good high temperature resistance.

Active Publication Date: 2015-07-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the high temperature resistance performance of silicone resin coatings, at present, technological measures such as preparation of special silicone high temperature resistant resin, modification of silicone resin and addition of high temperature resistant fillers are often adopted in the world to improve its high temperature resistance performance, such as: Dow Corning Corporation of the United States, Tempild Division and the National Institute of Materials and Chemical Engineering of Japan, etc., can achieve temperature resistance from 650 to 1400°C through the combination of silicone resin and aluminum powder, but the silicone coating with only aluminum powder has poor nuclear radiation resistance and corrosion resistance.
One of the characteristics of silicone coatings is that when used in a high temperature environment, due to the volatilization of organic matter in the coating, a certain number of holes and other defects are often caused, and these defects become corrosive Cl. - ions and O 2 The diffusion channel of the coating is easy to cause oxidation and salt spray corrosion of the substrate material under the coating, which is the main reason for the poor corrosion resistance of this type of high-temperature coating in the marine environment

Method used

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  • Nano-modified organic silicon coating with high temperature resistance, corrosion resistance and nuclear radiation resistance as well as preparation and application
  • Nano-modified organic silicon coating with high temperature resistance, corrosion resistance and nuclear radiation resistance as well as preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 1000 g of methyl silicone resin, 300 g of nano titanium powder (50 nm in particle size), 100 g of nano titanium dioxide powder (60 nm in particle size), 300 g of xylene and 500 g of zirconium silicate grinding beads with a particle size of 0.8 mm. Pre-mix methyl silicone resin, nano-titanium powder, nano-titanium dioxide powder, and xylene, add the above-mentioned pre-mixed mixture together with grinding beads into the circulating sand mill while stirring, stir at 2300rpm for 25 minutes, and take it out Obtain the A component. Weigh 300g of polyurethane resin and the above-mentioned component A and mix it evenly, and the viscosity will be 28s. Spray the paint on the surface of 304 stainless steel after sandblasting by spraying, and cure it at room temperature for 24 hours to obtain high temperature resistance, corrosion resistance and nuclear radiation resistance. protective coating.

[0029] In this embodiment, the performance parameters of the high temperature ...

Embodiment 2

[0032]Weigh 800 g of phenyl silicone resin, 200 g of nano titanium powder (80 nm in particle size), 80 g of nano titanium dioxide powder (50 nm in particle size), 400 g of xylene and 600 g of zirconium silicate grinding beads with a particle size of 0.8 mm. Pre-mix phenyl silicone resin, nano-titanium powder, nano-titanium dioxide powder, and xylene, add the above-mentioned pre-mixed mixture together with grinding beads into the circulating sand mill while stirring, stir at 2250rpm for 35min, take it out Obtain the A component. Weigh 250g of polyurethane resin and the above-mentioned component A and mix it evenly, and the viscosity will be 25s. Spray the paint on the surface of 304 stainless steel that has been sandblasted by spraying, and cure it at room temperature for 24 hours to obtain high temperature resistance, corrosion resistance and nuclear radiation resistance. protective coating.

[0033] In this embodiment, the performance parameters of the high temperature resis...

Embodiment 3

[0036] Weigh 1200 g of methylphenyl silicone resin, 180 g of nano titanium powder (40 nm in particle size), 150 g of nano titanium dioxide powder (60 nm in particle size), 400 g of xylene and 400 g of zirconium silicate grinding beads with a particle size of 0.8 mm. Pre-mix methylphenyl silicone resin, nano-titanium powder, nano-titanium dioxide powder, and xylene, and add the above-mentioned pre-mixed mixture together with grinding beads into a circulating sand mill while stirring, and stir at a speed of 1800rpm for 30 minutes. A component is obtained after taking out. Weigh 200g of polyurethane resin and the above-mentioned component A to mix evenly, and the viscosity is 22s. Apply the paint to the surface of GH907 high-temperature alloy steel after sandblasting by brushing, and cure it at room temperature for 24 hours to obtain high-temperature resistance and corrosion resistance. , Anti-nuclear radiation protective coating.

[0037] In this embodiment, the performance par...

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Abstract

The invention relates to a high-temperature-resistant, corrosion-resistant and nuclear-radiation-resistant protection technology for a metal part, in particular to a nano-modified organic silicon coating with high temperature resistance, corrosion resistance and nuclear radiation resistance as well as a preparation method and an application of the nano-modified organic silicon coating. The nano-modified organic silicon coating comprises components in parts by mass as follows: 50-100 parts of organic silicon resin, 5-60 parts of nano-powder, 5-40 parts of polyurethane resin and 0-50 parts of a diluent. The organic silicon resin, the nano-powder and xylene are proportionally placed in a circular sand mill together with grinding beads and are dispersed for 20-40 min at the rotating speed of 1,500-2,500 rpm to obtain a component A; the component A and a component B are uniformly mixed, with the adoption of a spraying, brushing or dip-coating mode, a coating layer is prepared on the surface of the metal part subjected to surface sand blasting processing, and the coating with high temperature resistance, corrosion resistance and nuclear radiation resistance is obtained after the coating layer is cured at the room temperature. The coating has good nuclear radiation resistance and excellent thermal stability, and the problems of oxidation, corrosion and radiation of the metal part served in the high-temperature, high-humidity, high-salt and nuclear-radiation environments are solved.

Description

technical field [0001] The invention relates to a high-temperature-resistant anti-corrosion and nuclear radiation-resistant protection technology for metal parts, in particular to a high-temperature-resistant anti-corrosion and nuclear radiation-resistant nano-modified organic silicon coating and its preparation method and application. Background technique [0002] As a new type of energy, nuclear energy is gradually being valued by countries all over the world. The use of nuclear energy is mainly based on nuclear power. Under normal circumstances, nuclear power plants are built by the sea, and the marine atmospheric environment where they are located is extremely corrosive, which makes metal components prone to aging and corrosion. The potential nuclear radiation around the nuclear reactor will also accelerate the aging of materials. At the same time, in order to prevent the appearance of radioactive dust, the current nuclear reaction facilities need to be protected by coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D175/04C09D5/10C09D7/12
Inventor 王成王福会朱圣龙江峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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