Device and method for measuring hydrogen permeability of metal material

A technology of permeability and metal materials, which is applied in the field of devices for measuring the hydrogen permeability of metal materials, which can solve the problems of difficulty in ensuring air tightness, failure to reach the growth environment of obligate anaerobic microorganisms, and inconvenient observation of the growth of microorganisms in the medium, etc. problem, to achieve the effect of good air tightness

Inactive Publication Date: 2021-06-29
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the study of the hydrogen permeation behavior of metal materials in the medium containing hydrogen-consuming microorganisms, the existing devices have the following deficiencies: the airtightness is difficult to guarantee, and the growth environment required by obligate anaerobic microorganisms cannot be achieved; From the beginning to the end, the contamination of the medium by external microorganisms is completely isolated; it is inconvenient to observe the growth of microorganisms in the medium
[0005] In summary, there is currently no suitable device and method for measuring the hydrogen permeability of metal materials in media containing hydrogen-consuming microorganisms.

Method used

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  • Device and method for measuring hydrogen permeability of metal material
  • Device and method for measuring hydrogen permeability of metal material
  • Device and method for measuring hydrogen permeability of metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The device for measuring hydrogen permeation performance of metal materials is equipped with A-type fixture 3, hydrogen-charging side anode electrolytic cell 5, B-type fixture 10, proton exchange membrane 12, B-type fixture 10, hydrogen-charging side cathode electrolytic cell 13, B-type fixture 10, metal sample 16, B-type fixture 10, hydrogen-measuring-side electrolytic cell 20, A-type fixture 3, and fixed by a fixing device.

[0039] Wherein, the front side of the A-type fixture 3 has a circular groove 21 for placing the nitrile rubber sealing ring 4, and four through holes 22 are arranged around it for placing the stainless steel screw 1.

[0040] Wherein, the anode electrolytic cell 5 on the hydrogen charging side is in the form of a glass cylinder, with two bottle mouths 6 arranged on the top, sealed with a butyl rubber stopper 8 and an aluminum cover 7, and a platinum wire auxiliary electrode 9 is inserted into the left bottle mouth. Wherein the platinum wire auxil...

Embodiment 2

[0068]The difference from Example 1 is that the hydrogen permeation current change of the metal material caused by the growth and metabolism process of hydrogen-consuming microorganisms is continuously monitored in real time, and the medium to be tested is a culture medium of homoacetogenic bacteria.

[0069] The method is as follows, steps 1-4 are the same as in Example 1, step 5 inoculation: use a sterile syringe to inoculate the cultured homoacetogenic bacteria into the sterile medium in the device at 2% v / v, and continuously record the current change , the change of the hydrogen permeation current of the metal material during the growth of hydrogen-consuming microorganisms can be measured (see Figure 5 ).

[0070] Figure 5 The hydrogen permeation current density curve of metal materials caused by the growth and metabolism of hydrogen-consuming microorganisms is monitored in real time. Figure 5 Among them, before the inoculation point is the hydrogen permeation current...

Embodiment 3

[0072] The difference from Example 1 is that: the medium to be measured is natural seawater, and a constant potential polarization of -0.85Vvs.SCE is applied to the hydrogen-filled surface of the metal sample 16 .

[0073] The method is that steps 1-4 are the same as in Example 1. The recorded current value is divided by the working area A of the sample to obtain the hydrogen permeation current density change curve of the metal material in natural seawater (see Image 6 ).

[0074] Depend on Image 6 The hydrogen permeation current density curve can read the steady state hydrogen permeation current density I ∞ , time constant t 0.63 (I=0.63I ∞ The corresponding time), combined with the thickness L of the sample and the working area A, the steady-state hydrogen diffusion flux J of the metal sample 16 in natural seawater under the condition of -0.85V vs. SCE constant potential polarization can be calculated ∞ , material apparent diffusion coefficient Da and surface adsorbed...

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Abstract

The invention relates to the field of metal corrosion, and particularly provides a device and a method for measuring hydrogen permeability of a metal material. The device is provided with an A-type clamp, a hydrogen charging chamber anode electrolytic tank, a B-type clamp, a proton exchange membrane, a B-type clamp, a hydrogen charging chamber cathode electrolytic tank, a B-type clamp, a metal sample, a B-type clamp, a hydrogen measuring chamber electrolytic tank and an A-type clamp from left to right, and the joints are sealed by butyl rubber sealing rings and fixed by fixing devices. The device disclosed by the invention is good in sealing performance, can meet the survival condition of obligate anaerobic microorganisms, prevents other microorganisms in the environment from polluting a to-be-detected medium, and is particularly suitable for researching the hydrogen permeation behavior of the metal material in a hydrogen-consuming microorganism-containing medium.

Description

technical field [0001] The invention relates to a device for studying the hydrogen permeation behavior of metal materials, in particular to a device and method for measuring the hydrogen permeation performance of metal materials. Background technique [0002] The marine environment is an extremely complex corrosion environment, and metal materials are prone to corrosion in the marine environment. Cathodic protection is a commonly used protection method in marine environment, but improper protection potential can promote the occurrence of cathodic hydrogen evolution reaction and increase the risk of hydrogen embrittlement of materials. When there are microorganisms in the environment, such as sulfate-reducing bacteria, their growth and metabolism activities and cathodic protection have a synergistic effect, which can jointly promote the occurrence of hydrogen embrittlement. Hydrogen permeability is an important index to evaluate the hydrogen embrittlement susceptibility of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02
CPCG01N17/006G01N17/02
Inventor 刘相局黄彦良许勇杨丹路东柱
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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