The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater
Concrete made with sea sand and seawater is rich in chlorine ions which are the main factors that induce corrosion of the reinforcement. In this study, an innovative method to rehabilitate reinforcement is presented; the concentrations of chloride ions and the corrosion inhibitor in concrete were me...
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MDPI AG
2020-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/6/1480 |
| _version_ | 1811326960637313024 |
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| author | Chonggen Pan Xu Li Jianghong Mao |
| author_facet | Chonggen Pan Xu Li Jianghong Mao |
| author_sort | Chonggen Pan |
| collection | DOAJ |
| description | Concrete made with sea sand and seawater is rich in chlorine ions which are the main factors that induce corrosion of the reinforcement. In this study, an innovative method to rehabilitate reinforcement is presented; the concentrations of chloride ions and the corrosion inhibitor in concrete were measured. Electrochemical chloride extraction (ECE) was applied as a control experiment via using saturated Ca(OH)2 solution as an external electrolyte. Bidirectional electromigration (BIEM)technology combined with the corrosion inhibitor could not only remove the chloride ions but also protect the steel bar in concrete, and animidazoline inhibitor mixed in concrete is more effective than thetriethylenetetramine inhibitor due to the specific molecular structure. It was found that the optimum ratio of N/Cl reached the maximum value 3.3, when the concentration of inhibitor was 1. Meanwhile, the experimental results also revealed that the corrosion inhibitor and chloride ion concentrations reached necessary levels on the surface of the steel, and the corrosion inhibitor migrated effectively. Overall, the contents of imidazoline and triethylenetetramine inhibitor in seawater concrete are0.75% and 1%, respectively. The results demonstrate that the addition of the corrosion inhibitor and the application of bidirectional electromigration would effectively improve the durability of reinforced concrete containing sea sand and seawater. |
| first_indexed | 2024-04-13T14:59:07Z |
| format | Article |
| id | doaj.art-819cbe0b4f1745f9b65a4636f64fea91 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-13T14:59:07Z |
| publishDate | 2020-03-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-819cbe0b4f1745f9b65a4636f64fea912022-12-22T02:42:22ZengMDPI AGMaterials1996-19442020-03-01136148010.3390/ma13061480ma13061480The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and SeawaterChonggen Pan0Xu Li1Jianghong Mao2Ningbo institute of Technology, Zhejiang University, Ningbo 315100, ChinaNingbo institute of Technology, Zhejiang University, Ningbo 315100, ChinaNingbo institute of Technology, Zhejiang University, Ningbo 315100, ChinaConcrete made with sea sand and seawater is rich in chlorine ions which are the main factors that induce corrosion of the reinforcement. In this study, an innovative method to rehabilitate reinforcement is presented; the concentrations of chloride ions and the corrosion inhibitor in concrete were measured. Electrochemical chloride extraction (ECE) was applied as a control experiment via using saturated Ca(OH)2 solution as an external electrolyte. Bidirectional electromigration (BIEM)technology combined with the corrosion inhibitor could not only remove the chloride ions but also protect the steel bar in concrete, and animidazoline inhibitor mixed in concrete is more effective than thetriethylenetetramine inhibitor due to the specific molecular structure. It was found that the optimum ratio of N/Cl reached the maximum value 3.3, when the concentration of inhibitor was 1. Meanwhile, the experimental results also revealed that the corrosion inhibitor and chloride ion concentrations reached necessary levels on the surface of the steel, and the corrosion inhibitor migrated effectively. Overall, the contents of imidazoline and triethylenetetramine inhibitor in seawater concrete are0.75% and 1%, respectively. The results demonstrate that the addition of the corrosion inhibitor and the application of bidirectional electromigration would effectively improve the durability of reinforced concrete containing sea sand and seawater.https://www.mdpi.com/1996-1944/13/6/1480reinforced concretesea sanddurabilityinhibitorbidirectional electromigration(biem) |
| spellingShingle | Chonggen Pan Xu Li Jianghong Mao The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater Materials reinforced concrete sea sand durability inhibitor bidirectional electromigration(biem) |
| title | The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater |
| title_full | The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater |
| title_fullStr | The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater |
| title_full_unstemmed | The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater |
| title_short | The Effect of a Corrosion Inhibitor on the Rehabilitation of Reinforced Concrete Containing Sea Sand and Seawater |
| title_sort | effect of a corrosion inhibitor on the rehabilitation of reinforced concrete containing sea sand and seawater |
| topic | reinforced concrete sea sand durability inhibitor bidirectional electromigration(biem) |
| url | https://www.mdpi.com/1996-1944/13/6/1480 |
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