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Experimental Study of Sulphate Attack on Steel Embedded in Reinforced Concrete

Experimental Study of Sulphate Attack on Steel Embedded in Reinforced Concrete Corrosion in reinforced concrete structure is a serious problem that leads to unexpected premature deterioration of reinforced concrete structure. One of the causes of the steel corrosion is due to ingress of sulphide ions at the surface of reinforcing bars in concrete. This study is an attempt to estimate corrosion effect of sulphuric acid solution through the parameters such as corrosion current density, corrosion rate and weight loss. This experimental study is carried out with the help of three-electrode electrochemical system. The study involves 12 mm ø and 8 mm ø steel bars embedded in cylindrical concrete specimen kept in sulphuric acid solution. Formation of a brown ring and cracks is observed near the bottom. The corrosion rate is found to be very high, when the specimens are immersed in concentrated sulphuric acid solution. The effect of diameter of bar to corrosion rate is observed to be negligible. Rusting is more in that portion of bar which is near the top; this may be due to its proximity to counter electrode and no provision of cover at this portion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of The Institution of Engineers (India): Series A Springer Journals

Experimental Study of Sulphate Attack on Steel Embedded in Reinforced Concrete

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Publisher
Springer Journals
Copyright
Copyright © 2019 by The Institution of Engineers (India)
Subject
Engineering; Civil Engineering
ISSN
2250-2149
eISSN
2250-2157
DOI
10.1007/s40030-018-00358-4
Publisher site
See Article on Publisher Site

Abstract

Corrosion in reinforced concrete structure is a serious problem that leads to unexpected premature deterioration of reinforced concrete structure. One of the causes of the steel corrosion is due to ingress of sulphide ions at the surface of reinforcing bars in concrete. This study is an attempt to estimate corrosion effect of sulphuric acid solution through the parameters such as corrosion current density, corrosion rate and weight loss. This experimental study is carried out with the help of three-electrode electrochemical system. The study involves 12 mm ø and 8 mm ø steel bars embedded in cylindrical concrete specimen kept in sulphuric acid solution. Formation of a brown ring and cracks is observed near the bottom. The corrosion rate is found to be very high, when the specimens are immersed in concentrated sulphuric acid solution. The effect of diameter of bar to corrosion rate is observed to be negligible. Rusting is more in that portion of bar which is near the top; this may be due to its proximity to counter electrode and no provision of cover at this portion.

Journal

Journal of The Institution of Engineers (India): Series ASpringer Journals

Published: Feb 13, 2019

References