A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of 2-amino pyridine inhibitor on the rehabilitation of chloride contaminated reinforced concrete with bidirectional electromigration method
Abstract Conventional anti-corrosion techniques provide short-term protection and are only suitable for low contaminate concrete. However, electrochemical techniques benefit highly contaminated concrete, but chlorides may reappear after some time. Developing on these techniques, Bidirectional Electromigration (BIEM) has recently received extensive interest. The present research injected an organic 2- Amino Pyridine Inhibitor into chloride-contaminated concrete under an electric field. The system's effectiveness was tested by measuring the chloride profile, inhibitor profile, change in corrosion rate and steel/concrete potentials. In addition, influence on various parameters such as initial admixed chloride content (1% and 3%), treatment duration (7 and 15 days), applied current density (1 A/m2 and 0.5 A/m2) and inhibitor concentration in the aqueous solution (0.3 M/L and 0.15 M/L) on treatment effectiveness was also investigated. The results indicated that after application of the BIEM, chlorides were extracted and inhibitors were migrated towards the steel bar. Further, chloride extraction and inhibitor migration efficiencies increased by increasing the treatment duration and current density. Additionally, results indicated that BIEM would be more effective for more severely chloride-contaminated structures.
Highlights An organic compound, 2 Amino pyridine has been employed in conjunction with ECE technique to protect RC under corrosion. The technique effectively pushed the chloride ions away from the steel rebar. The treatment can protect the corrosion with 99% inhibition efficiency. The corrosion inhibitor forms a protective layer over rebar surface upon reaching its surface.
Effect of 2-amino pyridine inhibitor on the rehabilitation of chloride contaminated reinforced concrete with bidirectional electromigration method
Abstract Conventional anti-corrosion techniques provide short-term protection and are only suitable for low contaminate concrete. However, electrochemical techniques benefit highly contaminated concrete, but chlorides may reappear after some time. Developing on these techniques, Bidirectional Electromigration (BIEM) has recently received extensive interest. The present research injected an organic 2- Amino Pyridine Inhibitor into chloride-contaminated concrete under an electric field. The system's effectiveness was tested by measuring the chloride profile, inhibitor profile, change in corrosion rate and steel/concrete potentials. In addition, influence on various parameters such as initial admixed chloride content (1% and 3%), treatment duration (7 and 15 days), applied current density (1 A/m2 and 0.5 A/m2) and inhibitor concentration in the aqueous solution (0.3 M/L and 0.15 M/L) on treatment effectiveness was also investigated. The results indicated that after application of the BIEM, chlorides were extracted and inhibitors were migrated towards the steel bar. Further, chloride extraction and inhibitor migration efficiencies increased by increasing the treatment duration and current density. Additionally, results indicated that BIEM would be more effective for more severely chloride-contaminated structures.
Highlights An organic compound, 2 Amino pyridine has been employed in conjunction with ECE technique to protect RC under corrosion. The technique effectively pushed the chloride ions away from the steel rebar. The treatment can protect the corrosion with 99% inhibition efficiency. The corrosion inhibitor forms a protective layer over rebar surface upon reaching its surface.
Effect of 2-amino pyridine inhibitor on the rehabilitation of chloride contaminated reinforced concrete with bidirectional electromigration method
Rajput, Tarun Singh (author) / Purnima (author) / Goyal, Arpit (author) / Goyal, Shweta (author)
2023-12-22
Article (Journal)
Electronic Resource
English
Bidirectional electromigration of a corrosion inhibitor in chloride contaminated concrete
| Online Contents | 2016
STUDY OF ELECTROCHEMICAL REHABILITATION OF CHLORIDE CONTAMINATED REINFORCED CONCRETE
| British Library Conference Proceedings | 2000