Journal article
Effect of Electrical Injection of Corrosion Inhibitor on the Corrosion of Steel Rebar in Chloride-Contaminated Repair Mortar
International journal of corrosion, Vol.2015, pp.1-10
2015
Handle:
https://hdl.handle.net/2376/116714
Abstract
The electrical rehabilitation treatments of repair mortar were performed with tetrabutylammonium bromide salt (TBAB) at an electrical current density of 5 A/m2, using two electrolytes (0.1 M NaOH and 0.1 M Na3BO3solutions), and for two time periods (1 and 4 weeks), respectively. The average organic cation-based inhibitor’s concentration in cement mortars before and after this treatment was quantified using the UV-Vis spectroscopy. The experimental results reveal that the EICI treatment with 0.1 M Na3BO3was more effective in injecting the inhibitor and in improving the chloride penetration resistance and compressive strength of the mortar, relative to using 0.1 M NaOH as electrolyte. In this case, after the 4-week EICI treatment, [TBA+] contents were 2.3 % and 2.4% by mass of cement mortar for uncontaminated and salt-contaminated mortars, respectively. After the 4-week EICI treatment, the apparent diffusion coefficients of chloride anion in cement mortar were decreased by 40% from 1.52 × 10−10 m2/s. The EICI treatment was able to halt the chloride-induced corrosion of the steel rebar by promoting its passivation. The 2-week EICI treatment using sodium hydroxide and sodium borate solutions decreased the corrosion current density of the rebar by 77.8% and 78.5%, respectively, approximately two months after the treatment.
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Details
- Title
- Effect of Electrical Injection of Corrosion Inhibitor on the Corrosion of Steel Rebar in Chloride-Contaminated Repair Mortar
- Creators
- The Huyen Nguyen - Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi 122000, VietnamTuan Anh Nguyen - Institute for Tropical Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 122300, VietnamThien Vuong Nguyen - Institute for Tropical Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 122300, VietnamVan Khu Le - Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi 122000, VietnamThi Mai Thanh Dinh - Institute for Tropical Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 122300, VietnamHoang Thai - Institute for Tropical Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 122300, VietnamXianming Shi - Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA
- Publication Details
- International journal of corrosion, Vol.2015, pp.1-10
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900547934601842
- Language
- English
- Resource Type
- Journal article