Hydrogen Absorption and Desorption in Steel by Electrolytic Charging

Mertens, Geert; Duprez, Lode; Cooman, B.C. De; Verhaege, M.

doi:10.4028/0-87849-429-4.816

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…The results of tests of hydrogen influence on change of mechanical properties, as well as hydrogen charging method in electrochemical cell are considered. The kinetics of hydrogen charging, according to literary data [1][2][3][4][5][6][7][8][9][10][11] and own tests, depending on the current density, duration of charging, material, used equipment and modes.…”

Section: Discussionmentioning

confidence: 99%

“…A distinctive feature of this method is the «skin effect» of surface layers [2][3][4]. The greatest efficiency is shown by the change in the electric current and duration of the experiment, as well as the use of notched samples, as any angle of the cathode accelerated absorbs hydrogen due to the increased concentration of the electric field in it [5,6]. Concentration of diffusion-moving hydrogen in steel is determined by means of gas analysis by method of extraction heating.…”

Section: Materials and Methods Of Researchmentioning

confidence: 99%

“…Concentration of diffusion-moving hydrogen in steel is determined by means of gas analysis by method of extraction heating. The obtained values (hydrogen concentrations and mechanical characteristics of electrochemically charged samples) depend significantly on the time elapsed since the moment of hydrogen charging, as the rate of hydrogen desorption is quite high [6].…”

Section: Materials and Methods Of Researchmentioning

confidence: 99%

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Physical Modeling of Steel Resistance to Hydrogen Embrittlement

Shaposhnikov

Tsvetkov

Strekalovskaya

et al. 2023

KEM

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Hydrogen can be used in the same energy processes as natural gas and become a tool for implementing the transition to a sustainable low-carbon economy. The level of contamination resulting from controlled combustion of hydrogen or methane-hydrogen mixture is relatively low, which will significantly reduce CO2 emissions. However, the use of hydrogen can involve considerable difficulties associated with the hydrogen compatibility of materials. With the increase in the production, storage and transportation of hydrogen gas, including through gas pipelines, hydrogen-resistant materials are needed. The main problem with hydrogen is its embrittling effect. Under the influence of hydrogen, pipelines materials can probably have the following: hydrogen charging of the surface layer under pressure, loss of plasticity at tensile loads, formation of cracks and blisters (by decogesia mechanism), diffusion to the stress concentrator according to adsorption theory, accumulation of hydrogen at the top of the crack (which can lead to cracking) and so on. To assess the possibility of using a pipeline system for transportation of hydrogen gas in large volumes, it is necessary to know hydrogen compatibility of pipe steel. Physical modeling of steel resistance to hydrogen embrittlement can be carried out using electrochemical and gas charging methods.

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Section: Discussionmentioning

confidence: 99%

Section: Materials and Methods Of Researchmentioning

confidence: 99%

Section: Materials and Methods Of Researchmentioning

confidence: 99%

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Physical Modeling of Steel Resistance to Hydrogen Embrittlement

Shaposhnikov

Tsvetkov

Strekalovskaya

et al. 2023

KEM

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“…In the case of cathodic charging the current density plays an important role in hydrogen absorption in steel. According to [6], the current density used must be between 0.8 mA/cm 2 to 62.5 mA/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

Ruiz

Bustos

Ramirez³

et al. 2022

Advances in Materials Science and Engineering

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The present work studied the characterization of boriding coatings without and with exposed hydrogen permeation on AISI 8620 through microstructure and mechanical behavior. A dehydrated paste pack process was carried out for the formation of boride coatings on AISI 8620 at 1173, 1223, and 1273 K for 6 h of exposure time for each temperature. After boronizing, hydrogen was introduced into the borided steels by in situ cathodic charging using an H2SO4 acid electrolyte. Specimens borided without and with hydrogen were characterized by scanning electron microscopy with energy dispersive spectroscopy and X-ray diffraction. The experimental techniques of the Vickers microhardness and three-point bending were used. As a result, the hydrogen diffusion on steel AISI 8620 borided shows a significant increase in microhardness. Furthermore, three-point bend tests showed an increased strength on 8620 steel borided. However, the ductility and strength value on 8620 steel borided surfaces presented a drastic reduction due to hydrogen permeation. The results revealed that the borided coatings provided strength and reduced the hydrogen embrittlement index on AISI 8620 borided.

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Hydrogen Absorption and Desorption in Steel by Electrolytic Charging

Cited by 2 publications

References 3 publications

Physical Modeling of Steel Resistance to Hydrogen Embrittlement

Physical Modeling of Steel Resistance to Hydrogen Embrittlement

Characterization of Boride Coatings on AISI 8620 Steels without and with Hydrogen Permeation

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