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A stainless steel-based composite hydrogen permeation resistance material and its preparation method

A permeable material, stainless steel technology, applied in the field of stainless steel-based composite hydrogen-resistant permeable material and its preparation, can solve the problem of poor high-temperature bonding force between alumina coating and stainless steel substrate, affecting the coating's hydrogen resistance and permeation performance, and the large gap in thermal expansion coefficient and other problems, to achieve the effect of improving hydrogen permeation resistance, excellent deposition uniformity, and good thermal expansion coefficient

Inactive Publication Date: 2020-08-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large gap between the thermal expansion coefficient of alumina and the stainless steel substrate, the high-temperature bonding force between the alumina coating and the stainless steel substrate is poor, causing the coating to fall off, which seriously affects the hydrogen permeation resistance of the coating.

Method used

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  • A stainless steel-based composite hydrogen permeation resistance material and its preparation method
  • A stainless steel-based composite hydrogen permeation resistance material and its preparation method
  • A stainless steel-based composite hydrogen permeation resistance material and its preparation method

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preparation example Construction

[0023] The preparation method of the stainless steel-based composite hydrogen permeation resistance material proposed by the present invention comprises the following steps:

[0024] (1) The stainless steel sheet is polished with sandpaper, then polished with a polishing paste, and finally the stainless steel sheet is ultrasonically cleaned and dried, and the unpolished surface of the stainless steel sheet is sealed with adhesive tape;

[0025] The specific process can be as follows: the 316L stainless steel sheet is polished with 800#, 1000#, 1500#, 2000#, 3000#, 5000#, 7000# silicon carbide sandpaper in sequence, and then the diamond polishing paste with a particle size of 0.5 μm is used Carry out polishing, and finally the sample is ultrasonically cleaned, and the solvents are ethanol, acetone, and deionized water in sequence, and the time for each cleaning is 5 minutes. After the sample is cleaned, use a hair dryer to dry the sample, and seal the unpolished side with adhes...

Embodiment 1

[0034] (1) Polish the stainless steel sheet with sandpaper, then polish it with polishing paste, and finally clean the sample ultrasonically, dry it, and seal the unpolished side with adhesive tape;

[0035] (2) the stainless steel sheet of above-mentioned step (1) is placed in activation solution and carries out activation treatment, and described activation solution is the hydrochloric acid that molar concentration is 0.12mol / L and molar concentration is 1.84mol / L sulfuric acid, by volume ratio 1 : 10 phases are mixed, the activation treatment temperature is 40°C, and the activation treatment time is 30 seconds;

[0036] (3) the stainless steel sheet of above-mentioned step (2) is placed in coloring liquid to carry out coloring treatment through the activation treatment, and the composition of described coloring liquid is: concentrated sulfuric acid (H 2 SO 4 ): 280mL / L, chromic anhydride (CrO 3 ): 250g / L, the coloring treatment temperature is 80°C, the coloring treatment ...

Embodiment 2

[0044] (1) Polish the stainless steel sheet with sandpaper, then polish it with polishing paste, and finally clean the sample ultrasonically, dry it, and seal the unpolished side with adhesive tape;

[0045] (2) the stainless steel sheet of above-mentioned step (1) is placed in activation solution and carries out activation treatment, and described activation solution is the hydrochloric acid that molar concentration is 0.12mol / L and molar concentration is 1.84mol / L sulfuric acid, by volume ratio 1 : 10 phases are mixed, the activation treatment temperature is 40°C, and the activation treatment time is 30 seconds;

[0046] (3) the stainless steel sheet of above-mentioned step (2) is placed in coloring liquid to carry out coloring treatment through the activation treatment, and the composition of described coloring liquid is: concentrated sulfuric acid (H 2 SO 4 ): 280mL / L, chromic anhydride (CrO 3 ): 250g / L, the coloring treatment temperature is 80°C, the coloring treatment ...

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Abstract

The invention relates to a stainless steel based composite hydrogen-blocking permeable material and a preparation method of same and belongs to the technical field of hydrogen-blocking materials. Thecomposite hydrogen-blocking permeable material is composed of, from interior to exterior, a chromium-rich spinel layer, a chromium oxide layer, and an alumina layer on the surface of a stainless steelsubstrate, wherein the spinel layer is formed on the stainless steel substrate through a chemical oxidation coloring method, the chromium oxide layer is formed through steps of electrodeposition andannealing, and the alumina layer is directly deposited on the surface of the chromium oxide layer through atom layer growth technology. With the spinel layer as a middle transition layer and the chromium oxide for further improving the hydrogen-blocking performance, the alumina coating layer has compact structure and strong binding force. The material has excellent hydrogen-blocking permeability and thermo-cyclic use performance.

Description

technical field [0001] The invention relates to a stainless steel-based composite hydrogen-resistant permeable material and a preparation method thereof, belonging to the technical field of hydrogen-resistant materials. Background technique [0002] With the development of society, human beings have an increasing demand for energy, while traditional energy is increasingly consumed, forcing human beings to look for sustainable new energy sources. Nuclear energy, which has huge reserves of energy, has attracted widespread attention. Nuclear fission energy is strongly affected by the radioactivity of nuclear waste. And intractable factors, thus limiting the development of fission energy. Compared with fission energy, nuclear fusion energy has the advantages of easy extraction of raw materials and high reaction energy release efficiency, and it will become an important way for human beings to obtain energy in the future. In nuclear fusion reactors, there are widespread permeati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/04C23C22/24C23C22/78C25D3/04C25D5/50C23C16/40C23C16/455
CPCC23C16/403C23C16/45527C23C22/24C23C22/78C23C28/042C25D3/04C25D5/50
Inventor 凌云汉周庆云卢朝霞张政军
Owner TSINGHUA UNIV
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