The experiment study to assess the impact of hydrogen blended natural gas on the tensile properties and damage mechanism of X80 pipeline steel

被引：88

作者：

Zhou, Dengji ^{[1
]}

Li, Taotao ^{[1
]}

Huang, Dawen ^{[1
]}

Wu, Yi ^{[2
]}

Huang, Zhongsheng ^{[2
]}

Xiao, Wang ^{[2
]}

Wang, Qin ^{[2
]}

Wang, Xiuyun ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, Key Lab Power Machinery & Engn, Educ Minist, Shanghai 200240, Peoples R China

[2] Natl Petr & Nat Gas Pipe Network Grp Co Ltd, West Pipeline Co, Urumqi 830012, Peoples R China

[3] Safetech Res Inst Co Ltd, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Hydrogen blended natural gas; X80 pipeline steel; Hydrogen embrittlement; Slow strain rate tensile experiments; Fracture morphology;

D O I：

10.1016/j.ijhydene.2020.11.267

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Environmental hydrogen embrittlement has become a non-negligible problem in the hydrogen blended natural gas transportation. To qualitatively study the degradation mechanism of X80 steel used in the natural gas pipelines, the slow strain tensile experiments are carried out in this work. The nitrogen and hydrogen are adopted to simulate the hydrogen blended natural gas to explore the tensile properties of X80 steel. According to the volume proportion of hydrogen, the test atmospheres are divided into the reference atmosphere and the hydrogen-contained atmospheres of 1%, 2.2% and 5%. The tensile experiments of the smooth and notched specimens are conducted in the above gas atmospheres. Mechanical properties and fracture morphologies after stretching are further analyzed. The results show that the hydrogen blended natural gas has little effect on the tensile and yield strengths. Distinguished from the hydrogen volume proportion of 1% and 2.2%, with the increase of hydrogen proportion, the effect of hydrogen on mechanical properties of specimens increases significantly. Moreover, the deteriorated mechanical properties of notched specimens are more seriously than those of smooth specimens. This work provides the basis for safe hydrogen proportion for X80 pipeline steel when transporting hydrogen blended natural gas. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：7402 / 7414

页数：13

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