Influence of sulfide on the onset of chloride-induced corrosion of steel reinforcement in alkali-activated slags
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
Authors/Creators:
Criado, M
Mundra, S
Bernal, SA
Provis, JL
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.
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