Dynamic testing apparatus and testing method for high-pressure hydrogen permeation

Abstract

The invention discloses a dynamic testing apparatus and testing method for high-pressure hydrogen permeation. According to the invention, hydrogen permeation quantity is measured in the process of stretching of a sample; and the quantitative relation between the state of fatigue load and hydrogen permeation quantity is measured on line in situ in different high-pressure hydrogen environments, the internal link between stress and segregation and diffusion of hydrogen can be visually presented, and that the hydrogen diffusion coefficient, acceleration amount and hydrogen acceleration amount of a material are directly related to dislocation movement under different conditions is indirectly found out through analysis, so a reliable data basis is provided for determination of dislocation density. The dynamic testing apparatus and testing method provided by the invention have the characteristics of reduction in test dose and reduction in testing time of a single experiment.

Description

technical field [0001] The invention relates to the technical field of high-pressure hydrogen permeation testing, in particular to a high-pressure hydrogen permeation dynamic mechanical testing device capable of testing the critical fatigue load of materials in a short time and measuring the hydrogen permeation amount under different temperatures, hydrogen pressures and fatigue loads and testing method. Background technique [0002] With the rapid development of my country's economy, the contradiction between energy supply and demand has become increasingly prominent, posing a serious threat to energy security and sustainable economic development. The development and utilization of hydrogen energy and the processing and upgrading of traditional fossil fuels have become important ways to solve energy supply and environmental problems. Hydrogenation reactors in petroleum hydrocracking, hydrofining, hydroreforming, coal hydrogenation liquefaction processes and ultra-high press...

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Problems solved by technology

[0004] China Invention Authorization Publication No.: CN202693457U, authorized publication date January 23, 2013, discloses a high temperature and high pressure hydrogen sulfide environment hydrogen permeation detection device, the high temperature and high pressure hydrogen sulfide environment hydrogen permeation detection device includes: a high temperature and high pressure cathode Reactor, the side wall on one side is radially provided with a sealing sleeve, one end of the sealing sleeve is located at the reaction chamber of the high temperature and high pressure cathode reactor, and the other end protrudes from the high temperature and high pressure cathode The outer wall of the reactor, and form a sealed connection with the outer wall of the high-temperature and high-pressure cathode reactor; the disadvantage of this invention is that the amount of hydrogen permeation cannot be detected while stretching the sample

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