Effect of Reinforcing Bar Chemical Composition on Corrosion Resistance

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https://hdl.handle.net/11299/156006

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Title

Effect of Reinforcing Bar Chemical Composition on Corrosion Resistance

Authors

Leon, Roberto T.

Jeon, Moon-Gu

Published Date

1994-10

Publisher

Minnesota Department of Transportation

Type

Report

Abstract

This research report looks at the chemical composition of reinforcing bars, and the sulfur content in particular, and their influences on the corrosion resistance of rebar. The research supports the original hypothesis--which suggests that the reduction in sulfur inclusions would benefit corrosion resistance. The reduction could result in significant savings that would more than offset the higher initial costs for these bars. To test the hypothesis, the study examined the corrosion resistance of four kinds of steel reinforcing bars; ordinary, low sulfur, copper and tungsten, and nickel. As in other series in the past, this research indicates conflicting results for different measurement techniques used to quantify corrosion rates. In addition, the mechanism that results in low sulfur bars showing a three-fold increase in corrosion life are not clear and need more study. The report recommends a long-term follow-up study on the use of both small cube and slab specimens in the laboratory, as well as full-scale specimens in the field.

Keywords

Reinforced concrete

Low-sulfur steel

Copper-tungsten

High nickel

Galvanic measurements

Corrosion

Cloride ions

Thermodynamics

Tafel extrapolation

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Research Reports

Series/Report Number

MnDOT
95-04

Funding information

Minnesota Department of Transportation

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Leon, Roberto T.; Jeon, Moon-Gu. (1994). Effect of Reinforcing Bar Chemical Composition on Corrosion Resistance. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/156006.

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