A preparation method of a vanadium alloy surface tritium penetration resistance electrical insulation coating and its prepared product

A technology of vanadium alloy and electrical insulation, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of material plasticity reduction, tritium radioactive pollution, fuel loss, etc., and achieve compact structure, good bonding, The effect of guaranteeing the self-sustainability of tritium

Active Publication Date: 2019-03-19
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is: when vanadium alloy is used as the fusion reactor cladding structure material, radioactive tritium can easily penetrate into the cladding structure material through diffusion, or penetrate into other systems or environments through the structure material, causing radioactive pollution of tritium and fuel loss , hydrogen embrittlement and helium embrittlement of materials can reduce the plasticity of materials, even brittle fractures, and hydrogen / tritium explosions, etc., and in some cases, it is necessary for vanadium-based alloys to have certain insulating properties. To provide a vanadium alloy surface resistance Preparation method of tritium-infiltrated electrical insulation coating and products prepared therefrom

Method used

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  • A preparation method of a vanadium alloy surface tritium penetration resistance electrical insulation coating and its prepared product
  • A preparation method of a vanadium alloy surface tritium penetration resistance electrical insulation coating and its prepared product
  • A preparation method of a vanadium alloy surface tritium penetration resistance electrical insulation coating and its prepared product

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Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1 prepares coating on V-5Cr-5Ti surface

[0050] The specific operation process of this embodiment is as follows.

[0051] 1) Take a V-5Cr-5Ti sheet with a length and width of 20 mm and a thickness of 2 mm. After degreasing by conventional methods, put the sample into AlCl in an argon-protected glove box. 3 -EMIC (molar ratio 2:1) solution (ie, ionic liquid), anodized at room temperature 25°C, potential 1.25V (Vs.Al), activated for 60min to remove the oxide film. Among them, when the vanadium alloy is activated, the vanadium alloy is used as the anode, the pure aluminum is used as the cathode, the anode and the cathode are continuously washed with ionic liquid, and the constant potential anode activation treatment is performed to remove the oxide film on the surface of the vanadium alloy.

[0052] 2) Put the V-5Cr-5Ti alloy after the anodizing treatment in step 1 into AlCl 3 -EMIC (molar ratio 2:1) solution, at room temperature 25°C, for aluminum plating. ...

Embodiment 2

[0056] Embodiment 2 prepares coating on V-4Cr4Ti surface

[0057] The specific operation process of this embodiment is as follows.

[0058] 1) Take a V-4Cr-4Ti sheet with a length and width of 20mm and a thickness of 2mm. After degreasing by conventional methods, put the sample into the AlCl 3 -EMIC (molar ratio 2:1) solution, anodized at room temperature 25°C, potential 1.25V (Vs.Al), activated for 30min to remove the oxide film. Among them, when the vanadium alloy is activated, the vanadium alloy is used as the anode, the pure aluminum is used as the cathode, the anode and the cathode are continuously washed with ionic liquid, and the constant potential anode activation treatment is performed to remove the oxide film on the surface of the vanadium alloy.

[0059] 2) Put the anodized sample in step 1 into AlCl 3 -EMIC (molar ratio 2:1) solution, at room temperature, for aluminum plating. During aluminum plating, pure aluminum is used as the anode, and the vanadium alloy pr...

Embodiment 3

[0063] Embodiment 3 prepares coating on columnar V-5Cr-5Ti surface

[0064] The specific operation process of this embodiment is as follows.

[0065] 1) Take a columnar V-5Cr-5Ti with a diameter of 20mm and a height of 50mm. After degreasing by conventional methods, put the sample into AlCl in an argon protective glove box. 3 - EMIC (molar ratio 2:1) solution, anodized at room temperature 25°C, potential 1.25V (Vs.Al), activated for 60min to remove the oxide film. Among them, when the vanadium alloy is activated, the vanadium alloy is used as the anode, the pure aluminum is used as the cathode, the anode and the cathode are continuously washed with ionic liquid, and the constant potential anode activation treatment is performed to remove the oxide film on the surface of the vanadium alloy.

[0066] 2) Put the anodized sample in step 1 into AlCl 3 -EMIC (molar ratio 2:1) solution, at room temperature, for aluminum plating. During aluminum plating, pure aluminum is used as th...

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Abstract

The invention discloses a preparation method of a tritium permeation resisting electrical insulating coating layer on the surface of a vanadium alloy and a product prepared through the preparation method, and aims to solve the problems of radioactive contamination of tritium and fuel loss due to the fact that when the vanadium alloy is used as a fusion reactor cladding structure material, radioactive tritium easily penetrates into the cladding structure material through diffusion or penetrates into other systems or the environment through the structure material, the problems of reduction of plasticity of a material, even brittle fracture and hydrogen / helium burning explosion due to hydrogen embrittlement and helium embrittlement of the material, and the problem that the vanadium-based alloy is required to have certain insulating property in some cases. By the adoption of the preparation method, the VAl / Al2O3 coating layer can be formed on the surface of the vanadium-based alloy. The coating layer has tritium permeation prevention and electrical insulation functions, and effectively overcomes the shortcomings of the existing alloy. The vanadium-based alloy containing the VAl / Al2O3 coating layer is relatively high in tritium permeation resistance, is particularly applicable to large-scale application of the vanadium-based alloy in a tritium production cladding layer of a fusion reactor, and has an important signification for guaranteeing the tritium self-consistency property, the economical property and the safety of the fusion reactor.

Description

technical field [0001] The invention belongs to the field of protective materials, in particular to the field of surface treatment and protection of vanadium alloy structural materials in fusion reactors and national defense, and specifically relates to a method for preparing a tritium-permeable electrical insulating coating on the surface of vanadium alloys and a product prepared therefrom. The material coating prepared by the invention has both tritium resistance and electrical insulation properties, and is especially suitable for the internal and external surface treatment of large-scale and complex-structure cladding components for fusion reactor production, and has good application prospects. Background technique [0002] Vanadium-based alloys not only have the advantages of small fast neutron absorption cross-section and good corrosion resistance to liquid metals, but also have good strength, plasticity, processability and resistance to radiation embrittlement / swelling....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/66C25D5/50C23C8/12
CPCC23C8/12C25D3/665C25D5/50
Inventor 张桂凯彭学星杨飞龙敬文勇向鑫唐涛汪小琳
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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