<strong>X80</strong>掺氢天然气管道的氢脆与腐蚀耦合作用研究

doi:10.11902/1005.4537.2024.262

中国腐蚀与防护学报

2025, Vol. 45

Issue (2): 407-415 CSTR: 32134.14.1005.4537.2024.262 DOI: 10.11902/1005.4537.2024.262

临氢关键材料服役行为研究专刊

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X80掺氢天然气管道的氢脆与腐蚀耦合作用研究

赵杰¹^,²(

), 徐广旭¹, 张烘玮¹, 李敬法², 吕冉¹, 王嘉龙¹, 闫东雷³

^1.北京石油化工学院安全工程学院北京 102627
^2.北京石油化工学院氢能研究中心北京 102627
^3.北京京辉绿氢新能源科技有限公司北京 102400

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

引用本文:

赵杰, 徐广旭, 张烘玮, 李敬法, 吕冉, 王嘉龙, 闫东雷. X80掺氢天然气管道的氢脆与腐蚀耦合作用研究[J]. 中国腐蚀与防护学报, 2025, 45(2): 407-415.
Jie ZHAO, Guangxu XU, Hongwei ZHANG, Jingfa LI, Ran LV, Jialong WANG, Donglei YAN. Coupling Effect of Hydrogen Embrittlement and Corrosion of X80 Pipeline Steel in Hydrogen-doped Natural Gas[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(2): 407-415.

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摘要:

采用原位氢渗透与腐蚀电化学测试，探讨了在4 MPa下，不同掺氢比对X80管线钢氢脆与腐蚀特性的影响。通过氢渗透电流、应力应变曲线及断口形貌分析等手段对氢脆行为进行评价，并利用电化学测试和腐蚀形貌分析技术研究X80管线钢的腐蚀规律。结果表明，在天然气掺氢环境中，氢渗透遵循“稳定-上升-下降”的规律，且随着掺氢比的增加，氢渗透电流穿透和到达峰值的时间更短；与未掺氢的试样相比，掺氢试样的力学性能均有所下降。随着掺氢比增加，X80管线钢的腐蚀电流密度增大，阻抗模值减小，腐蚀倾向性增强。基于上述研究，确定了氢脆与腐蚀耦合作用下天然气掺氢输送管线钢的失效机理。

关键词 ：掺氢天然气, X80管线钢, 原位氢渗透, 电化学腐蚀

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

收稿日期: 2024-08-20 32134.14.1005.4537.2024.262

ZTFLH:

TE832

基金资助:国家重点研发计划(2021YFB4001601)

通讯作者: 赵杰，E-mail：zhaojie@bipt.edu.cn，研究方向为过程装备安全评价技术

Corresponding author: ZHAO Jie, E-mail: zhaojie@bipt.edu.cn

作者简介: 赵杰，女，1976年生，硕士，教授

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.262 或 https://www.jcscp.org/CN/Y2025/V45/I2/407

图1 实验试样尺寸

图2 原位氢渗透与电化学实验装置

图3 不同掺氢比下X80管线钢的氢渗透电流曲线和氢渗透时间节点

表1 不同掺氢比下X80管线钢的氢渗透相关参数

图4 不同掺氢比下X80管线钢的Nyquist图和Bode图

图5 拟合EIS数据的等效电路图

表2 不同掺氢比下X80管线钢的电化学阻抗谱拟合数据值

图6 不同掺氢比下X80管线钢的Tafel极化曲线图

表3 不同掺氢比下X80管线钢的Tafel极化曲线拟合数据

图7 X80管线钢在10%、20%和40%掺氢比下的腐蚀宏观与微观形貌

图8 X80管线钢在10%、20%和40%掺氢比下的腐蚀三维形貌图

图9 不同掺氢比下X80管线钢的腐蚀产物XRD图谱

图10 不同掺氢比下X80管线钢的应力-应变曲线

表4 不同掺氢比下X80管线钢的力学性能参数

图11 X80管线钢在掺氢比为0%、10%、20%和40%下的拉伸断口整体与内部形貌

图12 天然气掺氢环境下氢脆与腐蚀耦合作用不同阶段的机理模型示意图

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