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Graphene coating layer capable of enhancing corrosion resistance and heat-conducting property and resisting large-dose gamma radiation

A technology with thermal conductivity and graphene, which is applied in the direction of coating, metal material coating process, heating inorganic powder coating, etc., to achieve the effect of reducing corrosion rate, enhancing corrosion resistance and good corrosion resistance

Active Publication Date: 2017-02-22
CHINA INST FOR RADIATION PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, graphene is added as a coating to form a graphene coating on the surface of the disposal container, and the research in this field is still blank.

Method used

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  • Graphene coating layer capable of enhancing corrosion resistance and heat-conducting property and resisting large-dose gamma radiation
  • Graphene coating layer capable of enhancing corrosion resistance and heat-conducting property and resisting large-dose gamma radiation

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Embodiment 1

[0034] Enhanced corrosion resistance and heat conduction performance of the present invention and graphene coating resistant to large doses of gamma radiation, such as figure 2 As shown, the graphene coating 1 has a thickness of 20-30 μm (for example: 20 μm, 25 μm or 30 μm), and is coated on the outer surface of the radioactive waste disposal container 2, and the radioactive waste disposal container is low-carbon steel or oxygen-free copper Material.

[0035] The thickness of the radioactive waste disposal container is 150-300mm (for example: 150mm, 200mm or 300mm).

Embodiment 2

[0037] The radioactive waste disposal container with enhanced corrosion resistance and thermal conductivity and graphene coating resistant to large doses of gamma radiation according to the present invention, such as figure 2As shown, the outer surface of the radioactive waste disposal container 2 is coated with a graphene coating 1, and the thickness of the graphene coating is 20-30 μm (for example: 20 μm, 25 μm or 30 μm), and the radioactive waste disposal container is Mild steel or oxygen-free copper material.

[0038] The thickness of the radioactive waste disposal container is 150-300mm (for example: 150mm, 200mm or 300mm).

Embodiment 3

[0040] Embodiment 1 or the preparation method of the graphene coating of enhancing corrosion resistance and thermal conductivity described in embodiment 2 and high-dose gamma radiation resistance, it may further comprise the steps:

[0041] (a) A certain amount of graphene oxide is added to a certain amount of aqueous solution, and the graphene is uniformly dispersed in the aqueous system by radiation oxidation treatment, and part of the graphene oxide is reduced to form a graphene dispersion; the radiation oxidation treatment Specifically, γ-ray irradiation is carried out at a dose of 700Gy / h, and the irradiation time is 50 hours; the mass ratio of graphene oxide to water is 1:8×10 6 .

[0042] (b) Surface treatment (for example: grinding, sandblasting, or electroplating) on ​​the outer surface of the radioactive waste disposal container to remove the oxide layer on the surface of low carbon steel or oxygen-free copper.

[0043] (c) coating the graphene oxide obtained in the...

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Abstract

The invention provides a graphene coating layer capable of enhancing the corrosion resistance and the heat-conducting property of a high-level radioactive waste treatment container and resisting the large-dose gamma radiation. The high-level radioactive waste treatment container is further subjected to graphene coating treatment, so that the corrosion resistance and the heat-conducting property of the treatment container are improved. The graphene coating layer is 20 to 30 [mu]m in thickness and is coated on the outer surface of the radioactive waste treatment container; and the radioactive waste treatment container is made of a low-carbon-steel or oxygen-free copper material. The radioactive waste treatment container is 150 to 300 mm in thickness. By the use of the high physical and chemical properties of graphene, the corrosion resistance and the intensity of the treatment container can be improved, and decay heat of a high-level radioactive waste glass solidified body or a spent fuel can be discharged in time, so that the performance of the treatment container is improved, the service life of the treatment container is prolonged, the complexity of a subsequent engineering barrier and a natural barrier is reduced, and the treatment cost for high-level radioactive wastes is reduced.

Description

technical field [0001] The invention relates to graphene coating treatment on high-level radioactive waste disposal containers to improve the corrosion resistance and thermal conductivity of the disposal containers. Background technique [0002] The safe disposal of high-level radioactive waste is one of the prominent issues facing the development of nuclear energy and the utilization of nuclear technology, and it is also a key and difficult issue in radioactive waste management. Considered the most engineering-promising disposal option, "geological disposal" refers to the disposal of solid radioactive waste at facilities in underground stable geological formations (usually hundreds of meters or more below the surface) so that the radioactive waste Long-term effective isolation from the biosphere. It takes the containment and isolation of radionuclides as the core content, multiple barriers (including waste bodies, packaging containers, buffer backfill materials and disposa...

Claims

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Application Information

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IPC IPC(8): C23C24/08
CPCC23C24/082
Inventor 冯文东刘伟梁栋杨仲田
Owner CHINA INST FOR RADIATION PROTECTION
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