Hydrogen permeability testing device for metal material under high liquid pressure

A metal material, permeability technology, applied in the direction of measuring devices, analytical materials, instruments, etc., can solve the problem of non-hydrogen permeation signal measurement and other problems

Active Publication Date: 2015-04-15
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] The purpose of the present invention is to provide a device for testing the hydrogen permeation performance of metal materials under high liquid pressure, so as to

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  • Hydrogen permeability testing device for metal material under high liquid pressure
  • Hydrogen permeability testing device for metal material under high liquid pressure
  • Hydrogen permeability testing device for metal material under high liquid pressure

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[0038] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0039] Such as figure 1 Shown is the structural diagram of the device, the bundled wire 5 protrudes from the top of the autoclave 1, and the test wires of the electrochemical workstation 1 2, electrochemical workstation 2 3 and thermocouple thermometer 4 located outside the autoclave 1 are all connected through the bundled wire 5. into the autoclave 1; the inner space formed by the bottom cover 6 of the hydrogen charging device, the middle section 17 of the hydrogen charging device and the upper cover 18 of the hydrogen charging device is the hydrogen expansion chamber 21; the O-ring-7 is located between the bottom cover 6 and the charging device Between the middle section 17 of the hydrogen device, the second O-ring 9 is located between the bottom cover...

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Abstract

The invention provides a hydrogen permeability testing device for a metal material under high liquid pressure, and belongs to the technical field of hydrogen permeability testing for materials. The device comprises an autoclave, an electrochemical workstation, a hydrogen charging device, a metal sheet specimen, a reference electrode, an auxiliary electrode and a thermocouple thermometer, wherein a high-elasticity film is embedded into an upper cover of the hydrogen charging device through a perforated plug valve, so that the elasticity of the film is utilized to eliminate the internal and external pressure difference, the liquid pressure intensity in a hydrogen charging chamber and a hydrogen diffusion chamber in the testing process can be kept balance, and meanwhile the two different liquids can be prevented from mixing. Therefore, the pressure intensity balance problem of different liquids in the hydrogen charging chamber and the hydrogen diffusion chamber under the high pressure can be solved; the device can be used for measuring the hydrogen permeability signals in the metal material electrochemical hydrogen charging process under the high liquid pressure; the anodic current density ia-time curves of various metal materials in the electrochemical hydrogen charging process under different liquid pressures, different temperatures and different hydrogen charging current densities can be tested and recorded, so that the material hydrogen induced cracking sensitivity can be further analyzed and evaluated through data processing.

Description

technical field [0001] The invention relates to the technical field of material hydrogen permeation testing, in particular to a device for testing the hydrogen permeation performance of metal materials under liquid high pressure. Background technique [0002] With the development of marine engineering technology, people's exploration and development of marine resources continue to advance to deeper seabeds. Since the structure and functional reliability of materials in the deep sea environment are much higher than those in land and shallow seas, any possible material corrosion damage may lead to serious engineering accidents in the deep sea environment. Therefore, the study of the influence of deep sea environment on the corrosion resistance of metal materials has received more and more attention. [0003] Hydrogen embrittlement or hydrogen-induced stress corrosion cracking of metal materials is an important aspect of studying the corrosion resistance of metal materials. Fo...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 刘智勇吴晓光李晓刚杜翠薇黄运华
Owner UNIV OF SCI & TECH BEIJING
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