Verifying the Reliability of Impressed Current Method to Simulate Natural Corrosion in Reinforced Concrete

Authors

  • Thi Hai Yen Nguyen Industrial University of Ho Chi Minh City
  • Van Hong Linh Bui Industrial University of Ho Chi Minh City
  • Van Mien Tran Ho Chi Minh City University of Technology
  • Nguyen Thi Cao Tien Giang University
  • Withit Pansuk Chulalongkorn University
  • Pitcha Jongvivatsakul Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2021.25.3.105

Keywords:

impressed current method, corrosion, mill-scale, corrosion products

Abstract

In order to accelerate the corrosion of steel reinforcement in the reinforced concrete structures for laboratory research, the impressed current method has been used widely regardless of the appropriacy of this method on the various aims of the studies relating to the deterioration of the reinforced concrete structures. The aim of this study is to characterize the influence of the impressed current method on the steel-concrete interface in the reinforced concrete to verify the reliability of this method on simulating the natural corrosion. The mill-scale of the steel reinforcement and the steel-concrete interfacial region were investigated using SEM-EDS. The results indicate that impressed current can induce the non-uniform and localized corrosion on the steel reinforcement. The corrosion products formed were likely to the natural corrosion induced by chloride environments. However, the oxidization of OH- at anode can inhibit the precipitation of corrosion products at steel-concrete interfacial region and then slowing down the formation of crack in concrete. This positively leads to an overestimation of load capacity of corroded structure and raises doubt on utilizing this technique to simulate the corrosion behavior.

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Author Biographies

Thi Hai Yen Nguyen

Department of Civil Engineering, Industrial University of Ho Chi Minh City, 12 Nguyen Van Bao, Ward 4, Go Vap Dist, Ho Chi Minh 700000, Vietnam

Van Hong Linh Bui

Department of Civil Engineering, Industrial University of Ho Chi Minh City, 12 Nguyen Van Bao, Ward 4, Go Vap Dist, Ho Chi Minh 700000, Vietnam

Van Mien Tran

Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, 70000, Vietnam

Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 70000, Vietnam

Nguyen Thi Cao

Faculty of Civil Engineering, Tien Giang University, 119 Ap Bac, ward 5, My Tho city, Tien Giang 860000, Vietna

Withit Pansuk

Innovative Construction Materials Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand

Pitcha Jongvivatsakul

Innovative Construction Materials Research Unit, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand

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Published In
Vol 25 No 3, Mar 31, 2021
How to Cite
[1]
T. H. Y. Nguyen, V. H. L. . Bui, V. M. Tran, N. T. Cao, W. Pansuk, and P. . Jongvivatsakul, “Verifying the Reliability of Impressed Current Method to Simulate Natural Corrosion in Reinforced Concrete”, Eng. J., vol. 25, no. 3, pp. 105-116, Mar. 2021.

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