Corrosion behavior of the reinforcement in chloride-contaminated alkali-activated fly ash pore solution
Article
Article Title | Corrosion behavior of the reinforcement in chloride-contaminated alkali-activated fly ash pore solution |
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ERA Journal ID | 4883 |
Article Category | Article |
Authors | Zhang, Zhangmin (Author), Chen, Rui (Author), Hu, Jie (Author), Wang, Yangyang (Author), Huang, Haoliang (Author), Ma, Yuwei (Author), Zhang, Zuhua (Author), Wang, Hao (Author), Yin, Suhong (Author), Wei, Jiangxiong (Author) and Yu, Qijun (Author) |
Journal Title | Composites Part B: Engineering |
Journal Citation | 224, pp. 1-14 |
Article Number | 109215 |
Number of Pages | 14 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 1359-8368 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compositesb.2021.109215 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S135983682100593X |
Abstract | Corrosion performance of the reinforcement was dramatically affected by chemical compositions of pore solution in alkali-activated fly ash. In this study, the electrochemical behavior and surface properties of reinforcement were characterized in chloride-contaminated simulated alkali-activated fly ash pore (SAFP) solution. The results indicated that due to the high alkalinity and formation of zeolite-like adsorption layer (about 20 nm), the reinforcement was still in passive state and exhibited high corrosion resistance in chloride-contaminated SAFP solution. However, the protective effect of passivation film (consisted of mainly FeOOH outer film and FeO inner film) and corrosion resistance of the reinforcement were reduced by chlorides. Further, the chloride threshold in SAFP solution was 10 times larger than simulated cement pore solution, due to the competitive adsorption between OH−/silicates and chlorides. |
Keywords | Alkali-activated fly ash; Chloride threshold concentration; Chloride-induced corrosion; Corrosion behavior; Reinforcement |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
400505. Construction materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | South China University of Technology, China |
Centre for Future Materials | |
Hunan University, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q78x7/corrosion-behavior-of-the-reinforcement-in-chloride-contaminated-alkali-activated-fly-ash-pore-solution
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