Liu, Q orcid.org/0000-0002-1132-9392, Qian, J, Neville, A et al. (1 more author) (2023) Solar thermal irradiation cycles and their influence on the corrosion behaviour of stainless steels with molten salt used in concentrated solar power plants. Solar Energy Materials and Solar Cells, 251. 112141. p. 112141. ISSN 0927-0248
Abstract
In this study, the corrosion behaviour of stainless steels AISI 321 and 347 in molten nitrate salt were investigated for up to 28 days. Three different thermal conditions; isothermal, thermal cycling and thermal shock, were explored to investigate the effect of the likely temperature gradients on the corrosion characteristics of AISI 321 and 347 during the operation of Concentrated solar power plants. Gravimetric corrosion analysis was combined with micro-morphology and cross-sectional analysis of the corrosion interface; using a combination of scanning/transmission electron microscopy, energy dispersive X-ray spectroscopy and X-Ray diffraction techniques, for this study. Results from corrosion rate measurements and surface characterisation show that thermal shock induces higher material degradation rate than the two other temperature profiles. Severe spallation of interfacial corrosion oxide layers was observed under thermal shock conditions other than in isothermal and thermal cycling conditions and correlated to the overall performance after 28 days. The level of spallation of interfacial oxides across the three temperature profiles investigated in this study was linked to the induced stresses from mismatch in the thermal expansion properties between the corrosion oxide layer and the substrate
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 Elsevier Ltd. All rights reserved. This is an author produced version of an article published in Solar Energy Materials and Solar Cells. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Molten nitrate salt; Isothermal; Thermal cycling; Thermal shock; Interfacial oxides; Spallation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Functional Surfaces (Leeds) |
Funding Information: | Funder Grant number Zhejiang JIULI Hi-Tech Metals Co Ltd Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Dec 2022 12:21 |
Last Modified: | 05 Dec 2023 01:13 |
Status: | Published |
Publisher: | Elsevier BV |
Identification Number: | 10.1016/j.solmat.2022.112141 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194140 |