Mundra, S. orcid.org/0000-0001-6559-8814, Samson, G. orcid.org/0000-0002-3472-8089, Masi, G. orcid.org/0000-0001-5204-2059 et al. (13 more authors) (2023) Application of electrochemical methods for studying steel corrosion in alkali‐activated materials. Materials and Corrosion, 74 (7). pp. 988-1008. ISSN 0947-5117
Abstract
Alkali-activated materials (AAMs) are binders that can complement and partially substitute the current use of conventional cement. However, the present knowledge about how AAMs protect steel reinforcement in concrete elements is incomplete, and uncertainties exist regarding the application of electrochemical methods to investigate this issue. The present review by EFC WP11-Task Force ‘Corrosion of steel in alkali-activated materials’ demonstrates that important differences exist between AAMs and Portland cement, and between different classes of AAMs, which are mainly caused by differing pore solution compositions, and which affect the outcomes of electrochemical measurements. The high sulfide concentrations in blast furnace slag-based AAMs lead to distinct anodic polarisation curves, unusually low open circuit potentials, and low polarisation resistances, which might be incorrectly interpreted as indicating active corrosion of steel reinforcement. No systematic study of the influence of the steel–concrete interface on the susceptibility of steel to corrosion in AAMs is available. Less common electrochemical methods present an opportunity for future progress in the field.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Materials and Corrosion published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited (https://creativecommons.org/licenses/by/4.0/). |
Keywords: | alkali-activated materials; anodic/cathodic polarisation; concrete; linear polarisation resistance; open circuit potential; reinforcement corrosion; resistivity |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Mar 2023 10:45 |
Last Modified: | 03 Oct 2024 13:59 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/maco.202313743 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:197033 |