Effect of microstructure on hydrogen permeation and trapping in natural gas pipeline steels.

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Materials Degradation Pub Date : 2025-01-01 Epub Date: 2025-06-14 DOI:10.1038/s41529-025-00615-5

Aminul Islam, Qidong Li, Emma Storimans, Kay Ton, Tahrim Alam, Zoheir N Farhat

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Abstract

This study examines hydrogen permeation and trapping in three types of natural gas pipeline steels from different decades in Canada-modern, vintage, and legacy steels. Electrochemical permeation experiments were conducted to measure the diffusion coefficient, subsurface concentration, and trap density of hydrogen. The results were analyzed to evaluate the susceptibility of these steels to hydrogen embrittlement and to understand the effects of hydrogen on their mechanical properties. Vintage steel exhibited 50% higher steady-state permeation current and 97% greater effective diffusivity compared to modern steel, while legacy steel showed intermediate values. Hydrogen diffusion increased with grain size and pearlite content but decreased with dislocation density. Modern steel demonstrated the highest resistance to hydrogen permeation due to its finer grain structure and higher dislocation density. This study provides essential insights into the diffusion behavior and trapping mechanisms of hydrogen in natural gas pipeline steels, enhancing the understanding of material performance under hydrogen exposure.

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微观组织对天然气管道钢氢渗透和捕集的影响。

本研究考察了加拿大不同年代的三种天然气管道钢材（现代、老式和传统钢材）的氢气渗透和捕集情况。通过电化学渗透实验测量了氢的扩散系数、地下浓度和阱密度。对试验结果进行了分析，以评估这些钢对氢脆的敏感性，并了解氢对其力学性能的影响。与现代钢相比，古钢的稳态渗透电流高50%，有效扩散系数高97%，而传统钢则处于中间值。氢扩散随晶粒尺寸和珠光体含量的增加而增加，但随位错密度的增加而减少。现代钢由于其更细的晶粒结构和更高的位错密度而表现出最高的抗氢渗透性能。该研究为氢在天然气管道钢中的扩散行为和捕获机制提供了重要的见解，增强了对氢暴露下材料性能的理解。

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

npj Materials Degradation MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

7.80

自引率

7.80%

发文量

审稿时长

6 weeks

期刊介绍： npj Materials Degradation considers basic and applied research that explores all aspects of the degradation of metallic and non-metallic materials. The journal broadly defines ‘materials degradation’ as a reduction in the ability of a material to perform its task in-service as a result of environmental exposure. The journal covers a broad range of topics including but not limited to: -Degradation of metals, glasses, minerals, polymers, ceramics, cements and composites in natural and engineered environments, as a result of various stimuli -Computational and experimental studies of degradation mechanisms and kinetics -Characterization of degradation by traditional and emerging techniques -New approaches and technologies for enhancing resistance to degradation -Inspection and monitoring techniques for materials in-service, such as sensing technologies