scholarly journals Corrosion Processes of Carbonated Chloride-Contaminated Reinforced Concrete and Electrochemical Chloride Extraction (ECE) Efficiency

2018 ◽  
pp. 159-172
Author(s):  
Yolaine Tissier ◽  
Véronique Bouteiller ◽  
Elisabeth Marie-Victoire ◽  
Suzanne Joiret ◽  
Thierry Chaussadent
Keyword(s):  
Reinforced Concrete ◽  
Electrochemical Chloride Extraction ◽  
Chloride Contaminated

scholarly journals Electrochemical chloride extraction to repair combined carbonated and chloride contaminated reinforced concrete

2019 ◽  
Vol 317 ◽  
pp. 486-493 ◽  
Author(s):  
Yolaine Tissier ◽  
Véronique Bouteiller ◽  
Elisabeth Marie-Victoire ◽  
Suzanne Joiret ◽  
Thierry Chaussadent ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Electrochemical Chloride Extraction ◽  
Chloride Contaminated

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

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 398 ◽  
Author(s):  
Chonggen Pan ◽  
Jianghong Mao ◽  
Weiliang Jin
Keyword(s):  
Reinforced Concrete ◽  
Extraction Efficiency ◽  
Corrosion Potential ◽  
Steel Bar ◽  
Chloride Migration ◽  
Significant Difference ◽  
Steel Bars ◽  
Novel Method ◽  
Electrochemical Chloride Extraction ◽  
High Chloride

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.

Effect of Interrupting Electricity Period on Electrochemical Chloride Extraction of Reinforced Concrete

2015 ◽  
Vol 754-755 ◽  
pp. 342-347
Author(s):  
Mien Van Tran ◽  
Dong Viet Phuong Tran ◽  
Mohd Mustafa Al Bakri Abdullah
Keyword(s):  
Reinforced Concrete ◽  
Corrosion Rate ◽  
Current Density ◽  
Concrete Structure ◽  
Chloride Concentration ◽  
Steel Reinforcement ◽  
Reinforced Concrete Structure ◽  
Half Cell ◽  
Cell Potential ◽  
Electrochemical Chloride Extraction

Electrochemical chloride extraction – ECE is an effective method to rehabilitate reinforced concrete structure, which has been corroded. This study investigated concentration of chloride remained in concrete and half-cell potential of the steel reinforcement after ECE using interrupting period of electricity current. Efficiency of ECE using Ca (OH)2was surveyed with two current density of 0.5 and 1A/m2. In this study, ECE treatment was proceeded intermittently in approximately 8 weeks. Results pointed out that chloride concentration decreased to 30 – 60% significantly, especially at in the vicinity of reinforcing steel. Simultaneously, half-cell potential of the steel reinforcement after 4 weeks halted treatment stabilizes in low-corrosion rate.

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