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Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method

Steel bars embedded in reinforced concrete are vulnerable to corrosion in high chloride environments. Bidirectional electromigration rehabilitation (BIEM) is a novel method to enhance the durability of reinforced concrete by extracting chloride out of concrete and introducing an inhibitor to the sur...

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Autores principales: Pan, Chonggen, Mao, Jianghong, Jin, Weiliang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013416/
https://www.ncbi.nlm.nih.gov/pubmed/31952219
http://dx.doi.org/10.3390/ma13020398
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author Pan, Chonggen
Mao, Jianghong
Jin, Weiliang
author_facet Pan, Chonggen
Mao, Jianghong
Jin, Weiliang
author_sort Pan, Chonggen
collection PubMed
description Steel bars embedded in reinforced concrete are vulnerable to corrosion in high chloride environments. Bidirectional electromigration rehabilitation (BIEM) is a novel method to enhance the durability of reinforced concrete by extracting chloride out of concrete and introducing an inhibitor to the surface of the steel bar under the action of an electric field. During the migration process, a higher ionization capacity of the inhibitor with a symmetrical molecular structure was introduced. A new imidazoline inhibitor was, therefore, employed in this study due to its great ionization capacity. The effect of imidazoline and triethylenetetramine inhibitor on chloride migration, corrosion potential, and strength of concrete were explored. The research results showed that the effect of chloride extraction and electrochemical chloride extraction made no significant difference on the surface of the concrete, where chloride extraction efficiency was more than 70%, and the chloride extraction efficiency was more than 90% around the location of the steel. while a dry-wet cycle test, the potential of concrete increased by about 200 mV by mixing imidazoline inhibitor. The imidazoline inhibitor was found to be effective at facilitating chloride migration and ameliorating corrosion, meanwhile, it had a negligible impact on the concrete’s strength.
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spelling pubmed-70134162020-03-09 Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method Pan, Chonggen Mao, Jianghong Jin, Weiliang Materials (Basel) Article Steel bars embedded in reinforced concrete are vulnerable to corrosion in high chloride environments. Bidirectional electromigration rehabilitation (BIEM) is a novel method to enhance the durability of reinforced concrete by extracting chloride out of concrete and introducing an inhibitor to the surface of the steel bar under the action of an electric field. During the migration process, a higher ionization capacity of the inhibitor with a symmetrical molecular structure was introduced. A new imidazoline inhibitor was, therefore, employed in this study due to its great ionization capacity. The effect of imidazoline and triethylenetetramine inhibitor on chloride migration, corrosion potential, and strength of concrete were explored. The research results showed that the effect of chloride extraction and electrochemical chloride extraction made no significant difference on the surface of the concrete, where chloride extraction efficiency was more than 70%, and the chloride extraction efficiency was more than 90% around the location of the steel. while a dry-wet cycle test, the potential of concrete increased by about 200 mV by mixing imidazoline inhibitor. The imidazoline inhibitor was found to be effective at facilitating chloride migration and ameliorating corrosion, meanwhile, it had a negligible impact on the concrete’s strength. MDPI 2020-01-15 /pmc/articles/PMC7013416/ /pubmed/31952219 http://dx.doi.org/10.3390/ma13020398 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pan, Chonggen
Mao, Jianghong
Jin, Weiliang
Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title_full Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title_fullStr Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title_full_unstemmed Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title_short Effect of Imidazoline Inhibitor on the Rehabilitation of Reinforced Concrete with Electromigration Method
title_sort effect of imidazoline inhibitor on the rehabilitation of reinforced concrete with electromigration method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013416/
https://www.ncbi.nlm.nih.gov/pubmed/31952219
http://dx.doi.org/10.3390/ma13020398
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