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Surface investigations of steels treated under hydrogen salt cavern boundary conditions

Ehmcke, Luisa (2022) Surface investigations of steels treated under hydrogen salt cavern boundary conditions. Master's, Technische Universiteit Delft.

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Large-scale hydrogen storage is a crucial part of the energy transition. The usage of salt caverns has a great potential in this process, but there are open questions regarding the construction’s lifetime which need to be investigated prior to their implementation. In this work, potential construction steels were studied. The conditions in a salt cavern were imitated on laboratory scale with an experimental high-pressure setup. Two steels, J55 and H2-ready X56, were systematically exposed to pressure/temperature cycles, gas (H2 and N2), water and brine. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) techniques were used for the characterisation of the steels’ surface, focussing on corrosion effects and crack formation. For both steels, a significant impact of moisture and salt ions could be shown. However, only for J55, intensification of corrosion and cracking on the surface due to hydrogen gas exposure was found. Pronounced crack formation over the entire surface of J55 was revealed. For X56 significantly less crack formation could be observed. Overall, the results strongly indicate better resistance of X56 than J55 against the conditions in a salt cavern, used for hydrogen storage.

Item URL in elib:https://elib.dlr.de/188377/
Document Type:Thesis (Master's)
Title:Surface investigations of steels treated under hydrogen salt cavern boundary conditions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ehmcke, Luisaluisa.ehmcke (at) dlr.dehttps://orcid.org/0000-0003-2770-7228
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Hydrogen, storage, salt caverns, steels, surface investigations
Institution:Technische Universiteit Delft
Department:Mechanical, Maritime and Materials Engineering
HGF - Research field:Energy
HGF - Program:Energy System Design
HGF - Program Themes:Digitalization and System Technology
DLR - Research area:Energy
DLR - Program:E SY - Energy System Technology and Analysis
DLR - Research theme (Project):E - Energy System Technology, E - Systems Analysis and Technology Assessment
Location: Oldenburg
Institutes and Institutions:Institute of Networked Energy Systems > Urban and Residential Technologies
Deposited By: Ehmcke, Luisa
Deposited On:07 Oct 2022 17:08
Last Modified:07 Oct 2022 17:08

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