Device and method for measuring hydrogen diffusion coefficient

A diffusion coefficient and testing system technology, applied in the direction of material electrochemical variables, etc., can solve problems such as complex device design, incomplete oxygen removal, and inaccurate measurement results, so as to improve accuracy and reliability, facilitate device construction, and test Effects in simple steps

Active Publication Date: 2015-09-30
SHANGHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In the study of hydrogen diffusion characteristics, there is currently no special equipment for monitoring the diffusion behavior of hydrogen in materials. Most of the existing devices are designed and built by researchers themselves. The results have low accuracy and poor repeatability, and oxygen is continuously generated in the cathode cell during the test process. Due to incomplete oxygen removal, the cathode surface is prone to corrosion, making the measurement results inaccurate and even unreliable.

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  • Device and method for measuring hydrogen diffusion coefficient
  • Device and method for measuring hydrogen diffusion coefficient
  • Device and method for measuring hydrogen diffusion coefficient

Examples

Experimental program
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Embodiment 1

[0036] In this example, see figure 1 and figure 2 , a device for measuring the hydrogen diffusion coefficient, consisting of a hydrogen diffusion test system, a temperature control system, and an oxygen removal system. The hydrogen diffusion test system consists of an electrochemical workstation 1, a computer or recorder 2, an anode cell drain valve 4, and an anode cell Auxiliary electrode 6, anode cell 7, reference electrode 8, connection gasket 9, DC constant current source 10, cathode cell drain valve 17, cathode cell auxiliary electrode 18, cathode cell 20 and sample to be tested 21, anode cell 7 and the cavity of the cathode pool 20 are made of glass, the auxiliary electrode 6 of the anode pool and the auxiliary electrode 18 of the cathode pool are made of platinum sheet electrodes, the connecting gasket 9 is made of fluororubber gasket, the current measurement range of the electrochemical workstation 1 is 0~±2A, and the current measurement The accuracy is ±10pA, the ou...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, especially in that:

[0045] In this example, see image 3 , the device for measuring the hydrogen diffusion coefficient, the cavity of the anode pool 7 and the cathode pool 20 is made of polytetrafluoroethylene. The anode cell auxiliary electrode 6 and the cathode cell auxiliary electrode 18 adopt nickel electrodes. The nitrogen pipeline used in the oxygen removal system adopts fluorine rubber tube. Delivery pump 14 and reflux pump 15 adopt miniature alkaline pumps. Connecting washer 9 adopts silica gel washer. The area of ​​the test sample 21 exposed to the solution is 4cm 2 . The current measurement range of electrochemical workstation 1 is 0~±2A, the current measurement accuracy is ±10pA, the output range is ±10V, and the accuracy is ±0.1mV. The current output range of the DC constant current source 10 is 0~±200mA, and the control accuracy is ±1nA. The quantity of deoxygenating bottle 13 is 3.

[0046] I...

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Abstract

The invention discloses a device and method for measuring the hydrogen diffusion coefficient, which can be applied to the field of measurement of material performance. The device comprises a hydrogen diffusion measurement system, a temperature control system and a deoxidation system. Hydrogen diffusion coefficients of materials under different temperatures can be measured by adopting the device and method, the measurement temperature range is 15-95 DEG C, the deoxidation system can remove oxygen in the system more thoroughly, the impact caused by oxygen can be reduced, the diffusion coefficient of hydrogen in materials can be obtained more accurately. The device and method for measuring the hydrogen diffusion coefficient have the advantages of being simple in operation, low in cost and accurate in measurement results.

Description

technical field [0001] The invention relates to an experimental analysis device and method for the diffusion behavior of inclusions in materials, in particular to a quantitative experimental analysis device and method for the diffusion parameters of hydrogen in materials, which are applied in the field of material performance detection and the technical field of material quality analysis . Background technique [0002] With the rapid development of the national economy, my country's demand for steel materials is gradually increasing, and the performance requirements for steel materials are getting higher and higher. Due to energy shortage and the accelerated pace of building a resource-saving society, the development and application of ultra-high-strength steel plates is of great significance to energy conservation and environmental protection. However, with the improvement of steel strength, the problem of hydrogen embrittlement of ultra-high-strength steel plates has beco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 夏培康史文胡钱钱于鹏飞邹楠江学乔
Owner SHANGHAI UNIV
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