Enhanced hydrogen degradation of two pipeline steels by increasing inert gas pressure in hydrogen-containing mixtures: experimental and theoretical insights

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-09-19 DOI:10.1016/j.corsci.2024.112466

Juan Shang , Ruizhe Gao , Baihui Xing , Haotian Wei , Zhengli Hua

引用次数: 0

Abstract

This study highlights the significant role of total gas pressure in enhancing hydrogen degradation in hydrogen/inert gas mixtures. Tests were performed to measure the fatigue crack growth rate (FCGR) of X80 and GB20# pipeline steels in pure hydrogen and hydrogen/nitrogen blends. Findings showed that FCGR increased in the blend with elevated total gas pressure relative to pure hydrogen, despite an equivalent hydrogen partial pressure between the two environments. First-principles molecular dynamics (FPMD) calculations revealed that the increased number of nitrogen molecules within the Fe-H₂-N₂ systems promoted the movement velocity of hydrogen and premature dissociation of hydrogen.

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通过增加含氢混合物中的惰性气体压力来增强两种管道钢的氢降解：实验和理论见解

这项研究强调了总气体压力在促进氢气/惰性气体混合物中氢降解方面的重要作用。试验测量了 X80 和 GB20# 管道钢在纯氢和氢气/氮气混合物中的疲劳裂纹生长率 (FCGR)。结果表明，尽管两种环境中的氢分压相等，但在混合气体中，FCGR 会随着气体总压的升高而增加。第一原理分子动力学（FPMD）计算显示，Fe-H2-N2 系统中氮分子数量的增加促进了氢的移动速度和氢的过早解离。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.