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Surface adsorption hydrogen rapid detection method of high-strength steel hydrogen damages

A surface adsorption and detection method technology, applied in the direction of material electrochemical variables, etc., can solve the problems of inability to quickly detect, unfavorable engineering hydrogen damage detection application, long test time, etc., and achieve accurate evaluation results

Inactive Publication Date: 2014-07-02
HARBIN ENG UNIV
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Problems solved by technology

However, the method is complicated to operate, requires electroplating on the metal surface, takes a long time to test, and cannot be quickly detected. It is suitable for laboratory scientific research and is not conducive to the application of engineering hydrogen damage detection.

Method used

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  • Surface adsorption hydrogen rapid detection method of high-strength steel hydrogen damages
  • Surface adsorption hydrogen rapid detection method of high-strength steel hydrogen damages
  • Surface adsorption hydrogen rapid detection method of high-strength steel hydrogen damages

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Embodiment Construction

[0024] The reliability of the present invention is described in detail below in conjunction with accompanying drawing and an example:

[0025] (1) Material to be tested: 10CrSiNiCu low-alloy high-strength steel. Use water-grinding sandpaper to grind the sample step by step to 2000, clean it with acetone and deionized water, and dry it with hot air;

[0026] (2) Hydrogen filling solution: 3.5% NaCl solution with pH=2.00 as corrosion medium, and boric acid (50 grams per liter) was added as buffer solution;

[0027] (3) Experimental parameters: Under the external tensile stress of 0 MPa, 50 MPa, and 100 MPa, respectively, the inductance and resistance of hydrogen adsorption, hydrogen permeation steady-state hydrogen permeation current, and fracture mechanical properties corresponding to different conditions were tested;

[0028] (4) Test results:

[0029] 1. Electrochemical impedance spectroscopy test: from figure 1 It can be seen intuitively that the intuitive impedance Nyquis...

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Abstract

The invention provides a surface adsorption hydrogen rapid detection method of high-strength steel hydrogen damages. The surface adsorption hydrogen rapid detection method comprises the following steps: measuring a low-frequency end inductive impedance arc in an acid corrosion medium of high-strength steel by using an electrochemical impedance spectrum testing method; fitting an equivalent circuit by using impedance to fit the low-frequency end inductive impedance arc so as to obtain the resistance size of an inductance resistor for representing the adsorption capability of hydrogen ions on a metal surface; and judging the hydrogen damage degree of the high-strength steel by using a measured numerical value of the inductance resistor according to a relation of the adsorption hydrogen inductance resistor, a hydrogen permeation amount and the hydrogen damages. According to the surface adsorption hydrogen rapid detection method, the adsorption capability of hydrogen on the surface of the high-strength steel is detected so as to evaluate the permeation behavior of hydrogen atoms into the high-strength steel, and furthermore, the effect of detecting the damage degree of the mechanical property of the high-strength steel by the hydrogen permeation atoms is realized. The invention provides a detection technology for rapidly and losslessly evaluating the hydrogen damages of materials in situ, and is applicable to engineering application.

Description

technical field [0001] The invention relates to a surface adsorption hydrogen detection method for hydrogen damage of high-strength steel. Background technique [0002] Hydrogen can enter many metals, typically platinum, palladium, and hydrogen storage alloys, and can also enter steel. The hydrogen atoms entering the steel will significantly reduce the mechanical properties of high-strength steel. The role of hydrogen has many different manifestations, such as white spots in steel, hydrogen bubbling and hydrogen-induced cracks, hydrogen-induced phase transformation, hydrogen-induced plasticity loss, hydrogen corrosion or the most serious hydrogen-induced cracking. When the hydrogen content reaches a certain level, it will cause hydrogen embrittlement fracture of the steel. Before the hydrogen-induced cracking, plastic deformation basically does not occur, and there are no obvious symptoms. Therefore, it is very harmful and should be avoided as much as possible in the projec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
Inventor 孟国哲张博玄晓阳邵亚薇张涛王艳秋刘斌
Owner HARBIN ENG UNIV
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