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Corrosion mechanism of hot-dip galvanised reinforcement bar in cracked concrete
Helsinki University of Technology, Faculty of Engineering and Architecture, Department of Structural Engineering and Building Technology.
Helsinki University of Technology, Faculty of Engineering and Architecture, Department of Structural Engineering and Building Technology.ORCID iD: 0000-0001-6287-2240
Helsinki University of Technology, Faculty of Engineering and Architecture, Department of Structural Engineering and Building Technology.
2008 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 50, no 12, p. 3416-3428Article in journal (Refereed) Published
Abstract [en]

In this paper, probable corrosion mechanisms of hot-dip galvanised reinforcement bar in cracked concrete based on long-term durability tests and other studies are determined. The fist mechanism consists of a local dissolution of eta (η) and zeta (ζ) phase. In the second mechanism due to non-uniform zinc coating local dissolution of eta (η) and zeta (ζ) phase together with longitudinal and perpendicular cracking in zinc layer may lead to separation of zinc layer. In the third mechanism due to non-uniform zinc coating full dissolution of eta (η) and partial dissolution of zeta (ζ) phase together with longitudinal and perpendicular cracking in ferrite may lead to separation of zinc layer and ferrite. Corrosion rate with used cement type was decreasing. That is not dependent on concrete quality. However, concrete type has an effect on corrosion rate and moisture conditions. © 2008 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2008. Vol. 50, no 12, p. 3416-3428
Keywords [sv]
A. Concrete, A. Zinc, B. SEM, C. Cracking, C. Pitting corrosion
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-6150DOI: 10.1016/j.corsci.2008.08.050Scopus ID: 2-s2.0-56949098389Local ID: 45a1bccb-ff25-4ae5-801b-8d6c27099c00OAI: oai:DiVA.org:ltu-6150DiVA, id: diva2:979027
Note

Upprättat; 2008; 20160222 (andcwi)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-08-20Bibliographically approved

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Cwirzen, A.

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