Criado, M, Mundra, S, Bernal, SA et al. (1 more author) (2018) Influence of sulfide on the onset of chloride-induced corrosion of steel reinforcement in alkali-activated slags. In: Basheer, PAM, (ed.) Durability of Concrete Structures. ICDCS2018: 6th International Conference on Durability of Concrete Structures, 18-20 Jul 2018, Leeds, UK. Whittles Publishing , pp. 149-153. ISBN 978-184995-394-8
Abstract
In alkali-activated slags (AAS), where ground granulated blast furnace slag is used as the main precursor, the presence of reduced sulfur species yields a highly reducing pore solution environment. This study investigates the influence of sulfide on steel passivation in alkali-activated slag mortars immersed in alkaline (1 M NaOH) and alkaline chloride-rich (1 M NaOH with 5 M NaCl) solutions, and the dependency of chloride-induced pitting on the immersion time and the concentration of sulfide in simulated alkali-activated slag pore solutions (containing 0.80 M OH- and 0 M, 0.01 M and 0.45 M HS-) by means of electrochemical techniques. Surfacesensitive X-ray photoelectron spectroscopic (XPS) and Raman spectroscopic analysis of the corrosion products formed on the steel surfaces, both in alkali-activated slag mortars and in simulated pore solutions, shows that sulfide has a very important influence in altering – but not necessarily in a deleterious way – the characteristics of the steel surface under these conditions.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | This article is protected by copyright. This is an author produced version of a paper published in Durability of Concrete Structures. Uploaded with permission from the publisher. |
Keywords: | alkali-activated slags; simulated pore solution; corrosion; chloride; sulfide; XPS |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Sep 2018 14:02 |
Last Modified: | 02 Oct 2018 08:45 |
Published Version: | http://www.whittlespublishing.com/ICDCS |
Status: | Published |
Publisher: | Whittles Publishing |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135538 |