A study on hydrogen uptake and diffusion in X65 pipeline steel using gaseous and electrochemical methods
Doctoral thesis
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https://hdl.handle.net/11250/3122122Utgivelsesdato
2024Metadata
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Sammendrag
Hydrogen, a clean energy carrier, is recognized as a critical building block to develop a carbon-neutral energy sector. To realize the hydrogen economy, it is essential to develop a hydrogen distribution infrastructure. Repurposing existing natural gas pipelines for H2 gas transportation is an economically favored choice for long-distance hydrogen transportation. However, pipeline steels can be subjected to hydrogen embrittlement (HE), and HE susceptibility is an essential part of evaluating the feasibility of repurposing pipelines. Hydrogen uptake and diffusivity can affect the degree of HE. H2 gas charging is challenging due to safety risks and limited testing facilities. In contrast, electrochemical charging is a safer and more accessible method. The objective of this PhD work is to relate electrochemical and gaseous hydrogen charging based on the hydrogen uptake. If the relationship is transferable to mechanical testing, electrochemical charging could support the evaluation of pipeline steels for H2 gas transport. Hydrogen uptake, diffusivity, and trapping in one vintage and two modern X65 pipeline steels were investigated. Both electrochemical and gaseous hydrogen charging have been conducted. Hydrogen desorption and permeation techniques were employed in the investigation.
Består av
Paper 1: Koren, Erik Aas; Hagen, Catalina Hoem Musinoi; Wang, Dong; Lu, Xu; Johnsen, Roy; Yamabe, Junichiro. Experimental comparison of gaseous and electrochemical hydrogen charging in X65 pipeline steel using the permeation technique. Corrosion Science 2023 ;Volum 215. https://doi.org/10.1016/j.corsci.2023.111025 This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Paper 2: Koren, Erik Aas; Hagen, Catalina Hoem Musinoi; Wang, Dong; Lu, Xu; Johnsen, Roy. Investigating electrochemical charging conditions equivalent to hydrogen gas exposure of X65 pipeline steel. Materials and corrosion - Werkstoffe und Korrosion 2023 s. 1-7 https://doi.org/10.1002/maco.202313931 This is an open access article under the terms of the Creative Commons Attribution License,CC BY
Paper 3: Koren, Erik Aas; Yamabe, Junichiro; Lu, Xu; Hagen, Catalina M.H.; Wang, Dong; Johnsen, Roy. Hydrogen diffusivity in X65 pipeline steel: Desorption and permeation studies. International Journal of Hydrogen Energy 2024 ;Volum 61. s. 1157-1169 https://doi.org/10.1016/j.ijhydene.2024.03.027 This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).