Method and device for real-time synchronous tracking of hydrogen evolution amount and electrochemical testing

A real-time synchronization and testing method technology, applied in the field of electrochemistry, can solve the problems of small hydrogen escape, large measurement error, and inability to further explore the mechanism of corrosion reaction

Active Publication Date: 2019-01-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

In this way, although the amount of hydrogen gas escaped can be measured intuitively, because the hydrogen gas escapes with water molecules, the measurement will be inaccurate and the experimental error will be increased.
In addition, the amount of hydrogen escaped is small, and the weight loss measurement requires a higher precision balance, so the measurement error is greater, and hydr

Method used

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  • Method and device for real-time synchronous tracking of hydrogen evolution amount and electrochemical testing

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Experimental program
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Embodiment Construction

[0048] 1. In the process of studying the corrosion mechanism of aluminum, pure aluminum is made into a working electrode, and the exposed reaction area is 2cm 2 . In 3.5% NaCl solution, the electrochemical test was carried out by cathodic polarization method.

[0049] When scanning the cathode hydrogen evolution reaction process, the cathode scanning potential starts from -1.49v to -2.0v, and the current density changes from -4.24×10-3Acm- 2 Change to -0.0374Acm- 2 , a total of 1193s were performed. During this period, a total of 215.8506g was added to the real-time camera balance display, and the amount of hydrogen gas was calculated to be 4.2690x10 -5 mol. The balance display increases by 215.8506g, that is, m=215.8506g, according to the previous formula

[0050] FL 1 =mgL 2

[0051] In device design, moment arm L 1 =L 2 , calculate F=2.11533588N,

[0052] Take the radius r of the cylinder as 0.05m, and reserve the height h of the upper part of the cylinder not im...

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Abstract

The invention belongs to the field of electrochemistry, particularly relates to a method and device for real-time synchronous tracking of hydrogen evolution amount and electrochemical testing, and provides a method for synchronous tracking of hydrogen evolution amount and electrochemical testing and a device used in the method. The method can achieve real-time tracking. Firstly, two cameras are added on the basis of generating hydrogen through measuring electrode reaction, real-time camera shooting recording is carried out on the hydrogen evolution amount and the corrosion situation of the electrode surface, and a relationship between potential current change and the hydrogen evolution amount can be obtained at any time in an experiment by combing an electrochemical on-line monitoring system.

Description

technical field [0001] The application belongs to the field of electrochemistry, and specifically relates to a method and device for real-time synchronous tracking of hydrogen evolution and electrochemical testing. Background technique [0002] With the development of the economy, people pay more and more attention to the huge losses caused by corrosion to the national economy, and corrosion protection has become one of the important fields of modern scientific and technological research. With the advancement of science and technology, light metals such as aluminum, magnesium and other metals have been used more and more widely. Many researchers have begun to use electrochemical and other testing methods to explore the corrosion mechanism of metals and their alloys. [0003] When performing metal corrosion and various electrochemical tests, electrode reactions are often accompanied by the release of hydrogen gas. Corrosion phenomena can often be explained by the relationshi...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02Y02E60/36
Inventor 鞠虹段进卓尹奕文刘书法
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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