Rebar corrosion due to chlorides in synergy with sodium, potassium, and magnesium

Sharma, Krishneel K. and Deo, Ravin N. and Kumar, Ajal and Mamun, Kabir (2018) Rebar corrosion due to chlorides in synergy with sodium, potassium, and magnesium. Construction and Building Materials, 165 . pp. 533-540. ISSN 0950-0618

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Abstract

The ability of steel reinforced concrete to withstand long service life is ensured by the strong binding between the concrete and the rebar. Although rebar corrosion deterioration in the presence of chlorides is well known, it is important to note that these anions are never present in isolation, i.e., other cations are also present within the exposed environment. Consequently, a study was conducted to investigate the rebar deterioration due to chlorides in the presence of different cations. A well-controlled laboratory experiment for assessing the corrosivity of sodium chloride, potassium chloride and magnesium chloride was conducted. The galvanostatic pulse technique was used to investigate the concrete-steel interfacial structure, which was modelled after a modified Randles circuit. Analysis revealed influences of the associated cations during the rebar corrosion process. A normalisation approach was used to compare chloride attacks on the rebar due to different salt solutions. Results suggest that chloride attacks in the presence of sodium cations are relatively corrosive.

Item Type:	Journal Article
Subjects:	T Technology > T Technology (General) T Technology > TD Environmental technology. Sanitary engineering
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
Depositing User:	Kabir Mamun
Date Deposited:	19 Jan 2018 03:42
Last Modified:	19 Jan 2018 03:42
URI:	http://repository.usp.ac.fj/id/eprint/10520

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