Potential and current distribution across different layers of reinforcement in reinforced concrete cathodic protection system- A numerical study

Arpit Goyal; Ezekiel Kehinde  Olorunnipa; Homayoon Sadeghi Pouya; Esmaiel Ganjian; Adegoke Olubanwo

doi:10.1016/j.conbuildmat.2020.120580

Potential and current distribution across different layers of reinforcement in reinforced concrete cathodic protection system- A numerical study

Arpit Goyal, Ezekiel Kehinde Olorunnipa, Homayoon Sadeghi Pouya, Esmaiel Ganjian, Adegoke Olubanwo

School of Energy, Construction and Environment

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

54 Downloads (Pure)

Abstract

Cathodic Protection (CP) is being applied extensively to protect reinforced concrete structures exposed to aggressive environment from corrosion. However, protection provided by cathodic protection is dependent on several parameters such as concrete resistivity, applied current density and the geometrical arrangement of anode and cathode. For the first time, the distribution of potential and protection current along different layers of reinforcement in concrete is numerically investigated. A parametric study was done to analyse the effect of applied current density and concrete resistivity on protection achieved by different layers of reinforcement. The results show, concrete with anode applied at one surface is only able to protect top two reinforcement layers with current density of 40 mA/m2, compared to anode at two adjacent concrete surfaces which protect all four layers of reinforcement with minimum 10 mA/m2 of current density. 80–90% of protection current reached the top layer of steel near the anode. Bottom layers of reinforcement received very minimal current and thus shows negligible protection. A drastic drop in protection was observed on moving down the reinforcement layers. Moreover, protection provided is highly depended on concrete resistivity.

Original language	English
Article number	120580
Journal	Construction and Building Materials
Volume	262
Early online date	28 Aug 2020
DOIs	https://doi.org/10.1016/j.conbuildmat.2020.120580
Publication status	Published - 30 Nov 2020

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 262, (2020) DOI: 10.1016/j.conbuildmat.2020.120580

© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

Cathodic protection
Corrosion
Impressed current
Modelling
Polarization
Potential and current distribution
Steel reinforced concrete

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)

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10.1016/j.conbuildmat.2020.120580

Post-PrintAccepted author manuscript, 5.96 MBLicence: CC BY-NC-ND

Cite this

Potential and current distribution across different layers of reinforcement in reinforced concrete cathodic protection system- A numerical study. / Goyal, Arpit; Olorunnipa, Ezekiel Kehinde ; Sadeghi Pouya, Homayoon; Ganjian, Esmaiel; Olubanwo, Adegoke.

In: Construction and Building Materials, Vol. 262, 120580, 30.11.2020.

Research output: Contribution to journal › Article › peer-review

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abstract = "Cathodic Protection (CP) is being applied extensively to protect reinforced concrete structures exposed to aggressive environment from corrosion. However, protection provided by cathodic protection is dependent on several parameters such as concrete resistivity, applied current density and the geometrical arrangement of anode and cathode. For the first time, the distribution of potential and protection current along different layers of reinforcement in concrete is numerically investigated. A parametric study was done to analyse the effect of applied current density and concrete resistivity on protection achieved by different layers of reinforcement. The results show, concrete with anode applied at one surface is only able to protect top two reinforcement layers with current density of 40 mA/m2, compared to anode at two adjacent concrete surfaces which protect all four layers of reinforcement with minimum 10 mA/m2 of current density. 80–90% of protection current reached the top layer of steel near the anode. Bottom layers of reinforcement received very minimal current and thus shows negligible protection. A drastic drop in protection was observed on moving down the reinforcement layers. Moreover, protection provided is highly depended on concrete resistivity.",

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note = "NOTICE: this is the author{\textquoteright}s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 262, (2020) DOI: 10.1016/j.conbuildmat.2020.120580 {\textcopyright} 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ ",

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AU - Olorunnipa, Ezekiel Kehinde

AU - Sadeghi Pouya, Homayoon

AU - Ganjian, Esmaiel

AU - Olubanwo, Adegoke

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 262, (2020) DOI: 10.1016/j.conbuildmat.2020.120580 © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2020/11/30

Y1 - 2020/11/30

N2 - Cathodic Protection (CP) is being applied extensively to protect reinforced concrete structures exposed to aggressive environment from corrosion. However, protection provided by cathodic protection is dependent on several parameters such as concrete resistivity, applied current density and the geometrical arrangement of anode and cathode. For the first time, the distribution of potential and protection current along different layers of reinforcement in concrete is numerically investigated. A parametric study was done to analyse the effect of applied current density and concrete resistivity on protection achieved by different layers of reinforcement. The results show, concrete with anode applied at one surface is only able to protect top two reinforcement layers with current density of 40 mA/m2, compared to anode at two adjacent concrete surfaces which protect all four layers of reinforcement with minimum 10 mA/m2 of current density. 80–90% of protection current reached the top layer of steel near the anode. Bottom layers of reinforcement received very minimal current and thus shows negligible protection. A drastic drop in protection was observed on moving down the reinforcement layers. Moreover, protection provided is highly depended on concrete resistivity.

AB - Cathodic Protection (CP) is being applied extensively to protect reinforced concrete structures exposed to aggressive environment from corrosion. However, protection provided by cathodic protection is dependent on several parameters such as concrete resistivity, applied current density and the geometrical arrangement of anode and cathode. For the first time, the distribution of potential and protection current along different layers of reinforcement in concrete is numerically investigated. A parametric study was done to analyse the effect of applied current density and concrete resistivity on protection achieved by different layers of reinforcement. The results show, concrete with anode applied at one surface is only able to protect top two reinforcement layers with current density of 40 mA/m2, compared to anode at two adjacent concrete surfaces which protect all four layers of reinforcement with minimum 10 mA/m2 of current density. 80–90% of protection current reached the top layer of steel near the anode. Bottom layers of reinforcement received very minimal current and thus shows negligible protection. A drastic drop in protection was observed on moving down the reinforcement layers. Moreover, protection provided is highly depended on concrete resistivity.

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KW - Modelling

KW - Polarization

KW - Potential and current distribution

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Potential and current distribution across different layers of reinforcement in reinforced concrete cathodic protection system- A numerical study

Abstract

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Keywords

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