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Journal of Chinese Society for Corrosion and protection  2025, Vol. 45 Issue (2): 407-415    DOI: 10.11902/1005.4537.2024.262
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Coupling Effect of Hydrogen Embrittlement and Corrosion of X80 Pipeline Steel in Hydrogen-doped Natural Gas
ZHAO Jie1,2(), XU Guangxu1, ZHANG Hongwei1, LI Jingfa2, LV Ran1, WANG Jialong1, YAN Donglei3
1.School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing 102627, China
2.Hydrogen Energy Research Center, Beijing Institute of Petrochemical Technology, Beijing 102627, China
3.Beijing Jinghui Green Hydrogen New Energy Technology Co., Ltd., Beijing 102400, China
Cite this article: 

ZHAO Jie, XU Guangxu, ZHANG Hongwei, LI Jingfa, LV Ran, WANG Jialong, YAN Donglei. Coupling Effect of Hydrogen Embrittlement and Corrosion of X80 Pipeline Steel in Hydrogen-doped Natural Gas. Journal of Chinese Society for Corrosion and protection, 2025, 45(2): 407-415.

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Abstract  

Herein, the effect of different hydrogen doping ratio on the hydrogen embrittlement and corrosion behavior of X80 pipeline steel in 4 MPa hydrogen-doped natural gas was investigated by means of insitu hydrogen permeation measurement and stress-strain curve measurement, as well as electrochemical corrosion methods and corrosion morphology characterization etc. The results indicate that in hydrogen-doped natural gas environment, hydrogen permeation follows a "stable-rise-decline" pattern. As the hydrogen doping ratio increases, the penetration time and the time to reach the peak current of the hydrogen permeation were shortened. The mechanical properties of the hydrogen-charged steels showed a decline compared to the blank ones. Besides, with the increasing hydrogen doping ratios, the corrosion current density of X80 pipeline steel increases, the impedance modulus decreases, and the corrosion tendency intensifies. Based on the above research, a failure mode of hydrogen-doped natural gas transmission pipeline steel under the coupled effect of hydrogen embrittlement and corrosion was established.
Key words:  hydrogen-blended natural gas      X80 pipeline steel      in situ hydrogen permeation      electrochemical corrosion     
Received:  20 August 2024      32134.14.1005.4537.2024.262
:  TE832  
Fund: National Key Research and Development Program(2021YFB4001601)
Corresponding Authors:  ZHAO Jie, E-mail: zhaojie@bipt.edu.cn
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ZHAO Jie
XU Guangxu
ZHANG Hongwei
LI Jingfa
LV Ran
WANG Jialong
YAN Donglei

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https://www.jcscp.org/EN/10.11902/1005.4537.2024.262     OR     https://www.jcscp.org/EN/Y2025/V45/I2/407

Fig.1  Experimental specimen size
Fig.2  The insitu hydrogen permeation and electrochemical experimental setup
Fig.3  Hydrogen permeation current curves (a) and hydrogen permeation time node (b) of X80 pipeline steel under different hydrogen blended ratios
Blended hydrogen ratioJSS / mol·cm-2·s-1Deff / cm2·s-1CH / mol·cm-3
10%1.78 × 10-120.73 × 10-60.24 × 10-6
20%1.98 × 10-120.87 × 10-60.26 × 10-6
40%2.27 × 10-120.99 × 10-60.29 × 10-6
Table 1  Hydrogen permeation parameters of X80 pipeline steel in different hydrogen blended ratios
Fig.4  Nyquist (a) and Bode (b) plots of X80 pipeline steel at different hydrogen blended ratios
Fig.5  Equivalent circuit used for fitting EIS data
Blended hydrogen ratioRs / Ω·cm2Ccp / S·s n ·cm-2Rct / Ω·cm2Cdl / S·s n ·cm-1Rcp / Ω·cm2RL / Ω·cm2L / H·cm2
10%87.56.13 × 10-5910.97.76 × 10-5198.1496.84 × 104
20%96.98.14 × 10-5898.92.85 × 10-5126.353.56.37 × 104
40%86.35.23 × 10-5886.23.64 × 10-5117.230.54.31 × 104
Table 2  Fitting data values of EIS of X80 pipeline steel under different hydrogen blended ratios
Fig.6  Tafel polarization curves of X80 pipeline steel in different hydrogen blended ratios
Blended hydrogen ratioEcorr / VIcorr / μA·cm-2βa / mV·dec-1βc / mV·dec-1
10%-0.6341.8474.24172.03
20%-0.6363.5177.25182.66
40%-0.6573.3178.16164.67
Table 3  Tafel polarization curve fitting data of X80 pipeline steel in different hydrogen blended ratios
Fig.7  Macroscopic and microscopic morphologies of X80 pipeline steel at 10% (a, d), 20% (b, e) and 40% (c, f) hydrogen ratios
Fig.8  Three-dimensional morphology of corrosion of X80 pipeline steel at 10% (a), 20% (b) and 40% (c) hydrogen blended ratios
Fig.9  XRD patterns of corrosion products of X80 pipeline steel in different hydrogen blended ratios
Fig.10  Stress-strain curves of X80 pipeline steel in different hydrogen blended ratios
Blended hydrogen ratioElongationReduction of area
10%13.8%45.2%
20%14.2%42.8%
40%13.5%41.3%
100%14.6%47.3%
Table 4  Mechanical property parameters of X80 pipeline steel in different hydrogen blended ratios
Fig.11  Overall and internal morphology of the tensile fracture of X80 pipeline steel at 0% (a, e), 10% (b, f), 20% (c, g) and 40% (d, h) hydrogen doping ratios
Fig.12  Schematic diagram of the mechanism model of hydrogen embrittlement and corrosion coupling at different stages in the hydrogen blending environment of natural gas: (a) first stage, (b) second stage, (c) third stage, (d) final stage
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