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Influence of chloride and moisture content on steel rebar corrosion in concrete
RISE, Swerea, KIMAB.ORCID iD: 0000-0001-9130-2925
RISE, Swerea, KIMAB. RISE - Research Institutes of Sweden, Materials and Production, KIMAB.ORCID iD: 0000-0003-3930-2551
RISE, Swerea, KIMAB.
Lund University, Sweden.
2016 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 67, no 10, p. 1049-1058Article in journal (Refereed) Published
Abstract [en]

Reinforced mortar samples were exposed in humidity chambers with different relative humidity or exposed in cyclic moisture conditions. The rebars were in an “as received” condition meaning that the preexisting oxide scale were intact. The lowest chloride concentration that initiated corrosion was 1% Cl− by mass of cement, corrosion was then observed for samples exposed at 97% relative humidity. It is suggested that the corrosion rate decreases when samples are exposed to a relative humidity lower than 97%. The results indicate that threshold levels should be evaluated at rather humid conditions (97%) despite the fact that the maximum corrosion rate at higher chloride levels is observed in the interval 91–94%. For samples exposed to cyclic moisture conditions, a lower chloride concentration was needed to initiate corrosion compared to samples exposed in static moisture conditions.

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2016. Vol. 67, no 10, p. 1049-1058
Keywords [en]
chloride, concrete, corrosion, moisture, steel, Chlorine compounds, Concretes, Scale (deposits), Chloride concentrations, Chloride levels, Humid conditions, Humidity chambers, Moisture conditions, Reinforced mortar, Threshold levels, Corrosion rate
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41191DOI: 10.1002/maco.201508799Scopus ID: 2-s2.0-84971631278OAI: oai:DiVA.org:ri-41191DiVA, id: diva2:1377363
Available from: 2019-12-11 Created: 2019-12-11 Last updated: 2019-12-11Bibliographically approved

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Ahlström, JohanTidblad, Johan

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