Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment
The relationship between corrosion characteristics and electrochemical indicators detected by the half-cell potential method is unclear. In this study, the corrosion characteristics of steel reinforcement exposed to an accelerated corrosive environment were investigated. Firstly, three series of con...
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525004267 |
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| author | Haiyang Luan Yingfang Fan Lihua Zhao Xiaolin Ju Surendra P. Shah |
| author_facet | Haiyang Luan Yingfang Fan Lihua Zhao Xiaolin Ju Surendra P. Shah |
| author_sort | Haiyang Luan |
| collection | DOAJ |
| description | The relationship between corrosion characteristics and electrochemical indicators detected by the half-cell potential method is unclear. In this study, the corrosion characteristics of steel reinforcement exposed to an accelerated corrosive environment were investigated. Firstly, three series of concrete specimens were prepared for the electrochemically accelerated corrosion test. The corrosion potential, galvanic current, and concrete resistance were obtained via an Anode-Ladder-System. The relationships between Cl- penetration depth, Cl- content, and electromigration time were discussed. Secondly, the corrosion ratios of rebar under different electromigration times were evaluated. The relationships between corrosion ratio of a rebar, Cl- content, and corrosion potential were analyzed. The critical corrosion depth of a rebar at concrete cover cracking was determined. Finally, a theoretical model for the critical corrosion depth of a rebar was established via elastic-plastic mechanics and fracture mechanics. The critical corrosion depths for different concrete cover thicknesses and rebar diameters were predicted. The results indicated that the relationship between corrosion ratio of rebar, Cl- content, and corrosion potential was exponential. The relationship between Cl- penetration depths, Cl- content, and corrosion ratio of rebar was logarithmic. As the concrete cover thickness increased and the rebar diameter decreased, the critical corrosion depth of rebar increased as a power function. When the concrete cover thickness was 10 mm and the rebar diameter was 10 mm, the critical corrosion depth was 13.5μm. The theoretical model can be utilized to predict critical corrosion depth under low concrete strength (less than C40) and small concrete cover thickness (less than three times rebar diameter). This study provides preliminary theoretical support for corrosion characteristics of reinforcement exposed to a corrosive environment. |
| format | Article |
| id | doaj-art-6ca4836688d5469e8f1bb10e62588b4e |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-6ca4836688d5469e8f1bb10e62588b4e2025-08-20T02:11:34ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0462810.1016/j.cscm.2025.e04628Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environmentHaiyang Luan0Yingfang Fan1Lihua Zhao2Xiaolin Ju3Surendra P. Shah4School of Transportation Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, China; Corresponding author.Department of Transportation Engineering, Dalian Maritime University, Dalian, Liaoning 116026, China; Liaoning Key Laboratory of Coastal Bridge & Tunnel Engineering, Dalian, Liaoning 116026, China; Corresponding author at: Department of Transportation Engineering, Dalian Maritime University, Dalian, Liaoning 116026, China.School of Transportation Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, ChinaSchool of Transportation Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, ChinaDepartment of Civil Engineering, University of Texas at Arlington, Arlington, TX 76010, USA; Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USAThe relationship between corrosion characteristics and electrochemical indicators detected by the half-cell potential method is unclear. In this study, the corrosion characteristics of steel reinforcement exposed to an accelerated corrosive environment were investigated. Firstly, three series of concrete specimens were prepared for the electrochemically accelerated corrosion test. The corrosion potential, galvanic current, and concrete resistance were obtained via an Anode-Ladder-System. The relationships between Cl- penetration depth, Cl- content, and electromigration time were discussed. Secondly, the corrosion ratios of rebar under different electromigration times were evaluated. The relationships between corrosion ratio of a rebar, Cl- content, and corrosion potential were analyzed. The critical corrosion depth of a rebar at concrete cover cracking was determined. Finally, a theoretical model for the critical corrosion depth of a rebar was established via elastic-plastic mechanics and fracture mechanics. The critical corrosion depths for different concrete cover thicknesses and rebar diameters were predicted. The results indicated that the relationship between corrosion ratio of rebar, Cl- content, and corrosion potential was exponential. The relationship between Cl- penetration depths, Cl- content, and corrosion ratio of rebar was logarithmic. As the concrete cover thickness increased and the rebar diameter decreased, the critical corrosion depth of rebar increased as a power function. When the concrete cover thickness was 10 mm and the rebar diameter was 10 mm, the critical corrosion depth was 13.5μm. The theoretical model can be utilized to predict critical corrosion depth under low concrete strength (less than C40) and small concrete cover thickness (less than three times rebar diameter). This study provides preliminary theoretical support for corrosion characteristics of reinforcement exposed to a corrosive environment.http://www.sciencedirect.com/science/article/pii/S2214509525004267Corrosion ratio of reinforcementCritical corrosion depthConcrete cover crackingHalf-cell potentialThick-walled cylinder model |
| spellingShingle | Haiyang Luan Yingfang Fan Lihua Zhao Xiaolin Ju Surendra P. Shah Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment Case Studies in Construction Materials Corrosion ratio of reinforcement Critical corrosion depth Concrete cover cracking Half-cell potential Thick-walled cylinder model |
| title | Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| title_full | Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| title_fullStr | Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| title_full_unstemmed | Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| title_short | Corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| title_sort | corrosion characteristics and critical corrosion depth model of reinforcement at concrete cover cracking in an electrochemical accelerated corrosion environment |
| topic | Corrosion ratio of reinforcement Critical corrosion depth Concrete cover cracking Half-cell potential Thick-walled cylinder model |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525004267 |
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