Experimental study on the influence of CO2 corrosion on hydrogen permeation and hydrogen embrittlement sensitivity of X52 pipeline steel

IF 4.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Engineering Failure Analysis Pub Date : 2025-04-20 DOI:10.1016/j.engfailanal.2025.109622

Jun Zhang, Peixun Yang, Zaiyu Xia, Cailin Wang, Yuxing Li

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Abstract

The corrosion product layer formed on the inner wall of hydrogen-blended natural gas pipelines significantly affects the interaction between hydrogen and pipeline steel, thereby influencing the hydrogen diffusion characteristics and hydrogen compatibility of the pipeline steel. By combining in-situ gaseous hydrogen permeation tests, SSRT tests, SEM morphological analysis, and XRD testing, this study investigates the microscopic morphology, composition, and structural characteristics of the CO₂ corrosion products formed on X52 pipeline steel under different conditions. It quantifies the impact of the CO₂ corrosion product layer on the hydrogen permeation kinetics of X52 steel and elucidates the mechanism of mechanical property degradation of X52 steel in a gaseous hydrogen environment with a CO₂ corrosion product layer, revealing the essential role of the corrosion product layer in affecting material hydrogen compatibility. The results show that compared with uncorroded samples, the steady-state current density of X52 steel samples under different corrosion conditions is significantly reduced. Furthermore, the hydrogen embrittlement index calculated from the SSRT tests and the fracture morphology indicate that while corrosion exacerbates the loss of material ductility, it also hinders hydrogen permeation.

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CO2腐蚀对X52管线钢氢渗透及氢脆敏感性影响的实验研究

氢气混合天然气管道内壁形成的腐蚀产物层显著影响氢气与管道钢的相互作用，从而影响管道钢的氢气扩散特性和氢相容性。通过现场气体渗氢试验、SSRT试验、SEM形貌分析和XRD测试，研究了X52管线钢在不同条件下形成的CO2腐蚀产物的微观形貌、组成和结构特征。量化了CO2腐蚀产物层对X52钢氢渗透动力学的影响，阐明了具有CO2腐蚀产物层的气态氢环境下X52钢力学性能退化的机理，揭示了腐蚀产物层在影响材料氢相容性中的重要作用。结果表明：与未腐蚀试样相比，不同腐蚀条件下X52钢试样的稳态电流密度显著降低；此外，根据SSRT试验和断裂形貌计算的氢脆指数表明，腐蚀在加剧材料延性损失的同时，也阻碍了氢的渗透。

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

Engineering Failure Analysis 工程技术-材料科学：表征与测试

CiteScore

7.70

自引率

20.00%

发文量

956

审稿时长

47 days

期刊介绍： Engineering Failure Analysis publishes research papers describing the analysis of engineering failures and related studies. Papers relating to the structure, properties and behaviour of engineering materials are encouraged, particularly those which also involve the detailed application of materials parameters to problems in engineering structures, components and design. In addition to the area of materials engineering, the interacting fields of mechanical, manufacturing, aeronautical, civil, chemical, corrosion and design engineering are considered relevant. Activity should be directed at analysing engineering failures and carrying out research to help reduce the incidences of failures and to extend the operating horizons of engineering materials. Emphasis is placed on the mechanical properties of materials and their behaviour when influenced by structure, process and environment. Metallic, polymeric, ceramic and natural materials are all included and the application of these materials to real engineering situations should be emphasised. The use of a case-study based approach is also encouraged. Engineering Failure Analysis provides essential reference material and critical feedback into the design process thereby contributing to the prevention of engineering failures in the future. All submissions will be subject to peer review from leading experts in the field.