Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride Induced Corrosion

Lima, Thamara Tofeti; Ann, Ki Yong

doi:10.37247/pams2ed.2.2020.20

Cited by 1 publication

(1 citation statement)

References 30 publications

(39 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…EDT forms precipitates in microstructures of concrete (voids in cement pastes, steel-concrete interface and aggregate-cement paste interface), which results in corrosion-resistant concrete [ 14 , 15 , 16 , 17 , 18 , 19 ]. Like the conventional cathode protection method, EDT is effective for reducing chloride ion concentration in concrete exposed to high chloride environment [ 17 , 18 , 20 ]. For the propagation period, it was demonstrated that EDT re-passivates corroded rebars by re-alkalizing concrete in the vicinity of corroded steel, which suppresses corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition Treatment (EDT) as a Comprehensive Rehabilitation Method for Corrosion-Induced Deterioration in Concrete with Various Severity Levels

Kim

Yee

Kee

2021

Sensors

View full text Add to dashboard Cite

The primary purposes of this study are to investigate the feasibility of electrochemical deposition treatment (EDT) as a comprehensive rehabilitation method for corrosion-induced deterioration in reinforced concrete with various severity levels, and to propose a guideline for the determination of critical factors to advance EDT. This study includes three experimental phases, each of which simulates the initiation (de-passivation), propagation (high corrosion activity), and acceleration (formation of a surface-breaking crack) periods of corrosion-induced deterioration. After completion of a series of accelerated corrosion tests, damaged concrete samples with different severity levels are rehabilitated by a series of EDT processes using a MgCl2 solution in an electrolyte. The main variables for this experiment are the concentration levels (0, 0.3, 1.0 and 3.0 M) of a MgCl2 solution for test phase 1, charging time (0, 2, and 7 days) in EDT for test phase 2, and configuration of pre- and post-treatment processes in EDT for test phase 3. The rehabilitation performance of EDT is evaluated by analyzing the AC impedance properties of the steel-and-concrete interface using electrochemical impedance spectroscopy (EIS) for the test phases 1 and 2, and microscopic alternation in concrete cracks using optical microscopic image and SEM/EDX. It is demonstrated that EDT is an effective method for preventing and mitigating corrosion-induced deterioration in the initiation and rust propagation periods of corrosion and for repairing (closing and filling) a corrosion-induced surface-breaking crack in the acceleration phase of corrosion. Corrosion-resistant performance of concrete increases as the concentration levels of a MgCl2 solution in an electrolyte increases and as the charging time in EDT increases. In addition, a post-treatment process (applying a NaOH solution) after the electrochemical deposition process significantly improves crack-repairing performance of EDT.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition Treatment (EDT) as a Comprehensive Rehabilitation Method for Corrosion-Induced Deterioration in Concrete with Various Severity Levels

Kim

Yee

Kee

2021

Sensors

View full text Add to dashboard Cite

show abstract

Efficiency of Different Electrolytes on Electrochemical Chloride Extraction to Recover Concrete Structures under Chloride Induced Corrosion

Abstract: Prime Archives in Material Science: 2 nd Edition 2 www.videleaf.com permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cited by 1 publication

References 30 publications

Electrochemical Deposition Treatment (EDT) as a Comprehensive Rehabilitation Method for Corrosion-Induced Deterioration in Concrete with Various Severity Levels

Electrochemical Deposition Treatment (EDT) as a Comprehensive Rehabilitation Method for Corrosion-Induced Deterioration in Concrete with Various Severity Levels

Contact Info

Product

Resources

About