Print Email Facebook Twitter Surface investigations of steels treated under hydrogen salt cavern boundary conditions Title Surface investigations of steels treated under hydrogen salt cavern boundary conditions Author Ehmcke, Luisa (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Janßen, Holger (mentor) Bottger, A.J. (mentor) Popovich, V. (graduation committee) Sietsma, J. (graduation committee) Padding, J.T. (graduation committee) Degree granting institution Delft University of Technology Programme Materials Science and Engineering Date 2022-09-26 Abstract 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. Subject Energy StorageHydrogenSalt caverns storageSteelsCorrosion To reference this document use: http://resolver.tudelft.nl/uuid:bead16eb-564f-4429-aebc-30cd52c54d1b Embargo date 2023-09-26 Part of collection Student theses Document type master thesis Rights © 2022 Luisa Ehmcke Files PDF MSc_thesis_Ehmcke.pdf 17.28 MB Close viewer /islandora/object/uuid:bead16eb-564f-4429-aebc-30cd52c54d1b/datastream/OBJ/view