Experimental device for hydrogen permeation behaviors of local areas of metal

A local area and experimental device technology, which is applied in the field of measuring instruments, can solve problems such as failure to apply, stress corrosion cracking, etc., and achieve the effects of low test cost, flexible test methods, and high accuracy of test data

Inactive Publication Date: 2013-11-20
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the test range of such test methods at home and abroad is at the centimeter level, which cannot be applied to the study of hydrogen permeation behavior in relatively narrow local areas of metal materials (such as stress concentration areas, crack tip areas, weld are

Method used

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  • Experimental device for hydrogen permeation behaviors of local areas of metal
  • Experimental device for hydrogen permeation behaviors of local areas of metal
  • Experimental device for hydrogen permeation behaviors of local areas of metal

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Experimental program
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Embodiment Construction

[0030] The present invention is described in detail below in conjunction with accompanying drawing:

[0031] combine figure 1 , The structure of the first embodiment of the present invention includes a micro-electrolytic cell 1, a corrosive environment simulation tank 4, an object-loading test bench 5, a Faraday electrostatic shielding box 6, and a working sample 7. Wherein the working sample 7 is installed in the corrosive environment simulation tank 4, one end of the micro-electrolytic cell 1 is in contact with the working surface of the working sample 7, and the micro-electrolytic cell 1 and the corrosive environment simulating tank 4 are all fixed on the loading test platform 5, and the loading experiment The table 5 is placed in a Faraday electrostatic shielding box 6 .

[0032] combine figure 1 and figure 2 , the micro-electrolytic cell test system uses a counter electrode 1-1, an Ag / AgCl reference electrode 1-2 and a working sample 7 to form a three-electrode system...

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Abstract

The invention provides an experimental device for hydrogen permeation behaviors of local areas of metal. The experimental device comprises a micro-electrolytic tank and a corrosion environment simulating groove, wherein one face of a working test sample is a detection area and the other face of the working test sample is a corrosion area; one end of the micro-electrolytic tank is contacted with a testing area of the working test sample; the corrosion area of the working test sample is contacted with a corrosion medium in the corrosion environment simulating groove; a three-electrode system is composed of a counter electrode, a reference electrode and the working test sample in the micro-electrolytic tank; the counter electrode, the reference electrode and the working test sample are connected with a counter electrode port, a reference electrode port and a working electrode port of an electrochemical work station by leads respectively; the electrochemical work station is connected with a computer by a data line. The invention provides the experimental device for researching the hydrogen permeation behaviors of the local areas of a metal material in a simulated stress corrosion environment and a testing range can reach a micron grade; the experimental device can be applied to the researches on the hydrogen permeation behaviors of specific narrow areas including a stress concentration area, a crack tip area, a welding line area and the like.

Description

technical field [0001] The invention relates to a measuring instrument, in particular to an experimental device for studying the hydrogen permeation behavior of local areas such as stress concentration areas, crack tip areas, and weld areas of metal materials in a simulated corrosion environment. Background technique [0002] After hydrogen enters the material, it often leads to various damages, such as "white spot" damage caused by cooling supersaturated hydrogen in steel, the formation of brittle hydride phases in some metals and their alloys, plasticity caused by the diffusion and enrichment of atomic hydrogen Loss and hysteresis fracture, etc. The damage of hydrogen to high-strength steel is particularly serious because of its general susceptibility to hydrogen-induced cracking (HIC), and as its strength increases, its HIC susceptibility increases. For fields such as aviation, ships, marine structures, chemical industry, oil refining, oil and gas transportation, etc., w...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 孟国哲玄晓阳张博邵亚薇张涛王艳秋刘斌
Owner HARBIN ENG UNIV
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