Hydrogen permeation measurement system

A test system and permeability technology, which is applied in the field of hydrogen permeation measurement device system, can solve problems such as the inability to combine development of different technologies, the difficulty of characterizing the comprehensive performance of materials, and the inability to accurately measure permeability, so as to achieve accurate and reliable test structures. Test analysis, good sealing performance effect

Inactive Publication Date: 2017-04-26
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the research on hydrogen storage materials is very extensive, there is no good criterion or device that can accurately determine the hydrogen isotope permeability of a certain material, which limits the potential of hydrogen storage materials, hydrogen permeable materials and hydrogen barrier coatings. and other technology development
Especially when it is necessary to quantitatively study the hydrogen storage performance of materials, the quantitative permeability of different materials cannot be accurately measured, making it difficult to characterize the comprehensive performance of improved materials, and it is impossible to effectively combine different technologies for development

Method used

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Experimental program
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Embodiment 1

[0041] Such as figure 1 The hydrogen permeability test system shown includes a heating temperature control furnace unit 2 with a fixed structure inside to fix the stainless steel sample to be tested (it can also be other sample materials). After the material is fixed, there is a test gas source inlet. The other side is the permeate side, and the detection pipeline is connected to the high-vacuum pipeline unit 1. The connection form is as follows figure 2 Shown. The material to be tested is clamped by the high-sealing tool for membrane penetration test, and the material to be tested is clamped in figure 2 The middle groove surface of the tooling shown enhances the stability of clamping and fixing, improves the sealing and balance performance of the material, and can realize more accurate testing.

[0042] Therefore, it is preferred that the tool test part of the present invention has mutually matched groove clamping parts for clamping the sample to be tested.

[0043] The overal...

Embodiment 2

[0052] Such as figure 1 The main structure of the hydrogen permeability test system device shown is the same as that of Example 1. Furthermore, the sample container is a calibrated constant volume container. The sample container has two functions: (one is) for materials with a higher hydrogen permeation rate, when hydrogen permeates from the high pressure side, more gas permeates into the sample container. Under constant temperature conditions, by measuring the pressure change in the sample container, the amount of permeated gas that changes with time can be obtained. Let the overall pressure change within a certain range to calculate the hydrogen permeability of the tested sample. (The second function of the sample container is) when the hydrogen permeation rate of the measured material is very slow, the gas pressure in the sample container does not change significantly, making the reading error increase, so the measured hydrogen permeation rate is not accurate, and RGA mass s...

Embodiment 3

[0056] Such as figure 1 The hydrogen permeability test system shown includes a heating temperature control furnace unit with a fixed structure inside to fix the stainless steel sample to be tested (other sample materials can also be used). The stainless steel material is fixed on one side with the test gas source inlet, and the other One side is the permeate side, and the permeate side is connected to the vacuum piping system and further connected to the vacuum piping unit. The heating temperature control furnace unit can control the ambient temperature of the tooling part of the material to be tested to continuously change within the temperature range of 77K~1100K, and the temperature accuracy is ±0.5℃. The vacuum piping system is connected to the main pipeline of the vacuum piping unit. A sample container, a hydrogen standard leak and a first molecular pump are respectively connected on both sides of the main pipeline, and a first scroll vacuum pump is connected to the back en...

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Abstract

The invention discloses a hydrogen permeation measurement system. The system includes a vacuum pipeline unit, a heating temperature control furnace unit, and a mass spectrometer unit. The heating temperature control furnace unit is used for realizing the heating and temperature control effects on a test material, and the heating temperature control furnace unit is internally provided with a tooling test part of the test material; the test material is fixed at the tooling test part to realize testing of hydrogen permeability; the vacuum pipeline unit consists of a sample container, a first scroll vacuum pump, a first molecular pump and a hydrogen standard leak, the sample container and the hydrogen standard leak are connected to a trunk pipeline, one end of the trunk pipeline is connected to a vacuum pipe system arranged inside the heating temperature control furnace unit; the sample container is provided with a vacuum gauge; and the mass spectrometer unit includes a second scroll vacuum pump, a second molecular pump and an RGA molecular mass spectrometer that are connected in order, and the RGA mass spectrometer is connected to the trunk pipeline. The hydrogen permeation measurement equipment provided by the invention adopts an integral structure, the structure has good sealing performance, and the test structure is more accurate and reliable.

Description

Technical field [0001] The invention relates to a hydrogen permeation measuring device system, in particular to an experimental device system for hydrogen permeation measurement at different temperatures, and belongs to the field of thermonuclear fusion. Background technique [0002] In the prior art, materials such as stainless steel are often made into containers for storing hydrogen. However, general stainless steel materials have weak resistance to hydrogen permeation, and there are usually hydrogen diffusion and permeation problems. Hydrogen penetration in metal materials may cause hydrogen embrittlement and other phenomena, affect the structural strength of the material, and bring serious safety hazards to equipment using hydrogen. [0003] In the field of thermonuclear fusion, hydrogen isotopes need to be used: deuterium and tritium are used as fuels for thermonuclear fusion. The storage requirements for deuterium and tritium are more stringent than ordinary hydrogen storage...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N13/04G01N27/62
CPCG01N15/0826G01N13/04G01N27/62
Inventor 邓立宋江锋张志安永涛罗军洪喻彬姜飞胡俊陈克琳殷雪峰
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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