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Hydrogen Damage Behavior of X80 Pipeline Steel Under AC Interference.

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Title: Hydrogen Damage Behavior of X80 Pipeline Steel Under AC Interference.
Authors: Li, Tong1,2 (AUTHOR), Li, Zhihui1,2,3 (AUTHOR), Jiang, Kejun3 (AUTHOR), Cai, Yuxiang3,4 (AUTHOR), Sun, Wan4,5 (AUTHOR), He, Ziyong1,5 (AUTHOR) jinjun2358@163.com, Zhao, Jun2,5 (AUTHOR), Cao, Tao1,3 (AUTHOR), Jin, Junjun3,4 (AUTHOR), Chen, Wenjing1,5 (AUTHOR), Gou, Guoqing3 (AUTHOR) gouguoqing1001@163.com
Source: Materials (1996-1944). Dec2025, Vol. 18 Issue 24, p5487. 16p.
Subjects: Hydrogen embrittlement of metals, Alternating currents, Steel pipe, Electrochemical experiments, Mechanical behavior of materials, Stress corrosion cracking, Welded joints
Abstract: X80 pipeline steel is a key material in the field of oil and gas transportation. Its damage behavior in a hydrogen-filled environment directly affects pipeline safety. In this study, through hydrogen permeation experiments and slow strain rate tensile tests, the electrochemical responses and hydrogen-induced cracking behaviors of X80 base metal and welded joints under hydrogen filling conditions in both AC and DC were systematically compared. The results show that when the base material is filled with hydrogen at 20 mA/cm2 AC, the hydrogen permeation flux is the largest, and the overall hydrogen permeation parameter of the welded joint is lower than that of the base material. High-frequency polarization promotes hydrogen permeation, but anodic corrosion products at high current densities can impede hydrogen entry. The slow strain rate tensile test further confirmed that the mechanical properties of the material declined more significantly under direct current hydrogen charging, and the sensitivity to stress corrosion cracking was higher. Under alternating hydrogen charging conditions, due to the alternating effects of hydrogen charging at the cathode and corrosion at the anode, a relatively low hydrogen embrittlement sensitivity is exhibited. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Hydrogen Damage Behavior of X80 Pipeline Steel Under AC Interference.
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  Data: <searchLink fieldCode="DE" term="%22Hydrogen+embrittlement+of+metals%22">Hydrogen embrittlement of metals</searchLink><br /><searchLink fieldCode="DE" term="%22Alternating+currents%22">Alternating currents</searchLink><br /><searchLink fieldCode="DE" term="%22Steel+pipe%22">Steel pipe</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+experiments%22">Electrochemical experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Stress+corrosion+cracking%22">Stress corrosion cracking</searchLink><br /><searchLink fieldCode="DE" term="%22Welded+joints%22">Welded joints</searchLink>
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  Label: Abstract
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  Data: X80 pipeline steel is a key material in the field of oil and gas transportation. Its damage behavior in a hydrogen-filled environment directly affects pipeline safety. In this study, through hydrogen permeation experiments and slow strain rate tensile tests, the electrochemical responses and hydrogen-induced cracking behaviors of X80 base metal and welded joints under hydrogen filling conditions in both AC and DC were systematically compared. The results show that when the base material is filled with hydrogen at 20 mA/cm2 AC, the hydrogen permeation flux is the largest, and the overall hydrogen permeation parameter of the welded joint is lower than that of the base material. High-frequency polarization promotes hydrogen permeation, but anodic corrosion products at high current densities can impede hydrogen entry. The slow strain rate tensile test further confirmed that the mechanical properties of the material declined more significantly under direct current hydrogen charging, and the sensitivity to stress corrosion cracking was higher. Under alternating hydrogen charging conditions, due to the alternating effects of hydrogen charging at the cathode and corrosion at the anode, a relatively low hydrogen embrittlement sensitivity is exhibited. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma18245487
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 5487
    Subjects:
      – SubjectFull: Hydrogen embrittlement of metals
        Type: general
      – SubjectFull: Alternating currents
        Type: general
      – SubjectFull: Steel pipe
        Type: general
      – SubjectFull: Electrochemical experiments
        Type: general
      – SubjectFull: Mechanical behavior of materials
        Type: general
      – SubjectFull: Stress corrosion cracking
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      – SubjectFull: Welded joints
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      – TitleFull: Hydrogen Damage Behavior of X80 Pipeline Steel Under AC Interference.
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              Text: Dec2025
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