Hydrogen Embrittlement Behavior of Mixed Hydrogen Natural Gas Pipeline Steel: A review

The economical and efficient of using existing current natural gas pipelines for hydrogen transportation has garnered domestic and foreign researchers in recent years. However, the problem of hydrogen embrittlement in pipeline steel caused by hydrogen poses a great challenge to the long-term safe operation of pipelines, and research on the hydrogen embrittlement behavior of pipeline steel for hydrogen doped natural gas transportation is urgently needed. The research progresses on the mechanism of metal hydrogen embrittlement were reviewed and the current research status on the changes in mechanical properties of pipeline steel under hydrogen/hydrogen doped natural gas environments were summarized in this article. In addition, common methods for suppressing hydrogen embrittlement behavior in pipeline steel were introduced, and the reference for effective solutions to hydrogen embrittlement problems were provided to ensure the safe operation of natural gas transmission pipelines.