Surface characteristics and electrochemical behaviors of passive reinforcing steel in alkali-activated slag

Wang, Yangyang and Chen, Rui and Hu, Jie and Zhang, Zhangmin and Huang, Haoliang and Ma, Yuwei and Wei, Jiangxiong and Zhang, Zuhua and Yin, Suhong and Wang, Hao and Yu, Qijun (2021) Surface characteristics and electrochemical behaviors of passive reinforcing steel in alkali-activated slag. Corrosion Science, 190:109657. pp. 1-12. ISSN 0010-938X


Abstract

In alkali-activated slag (AAS), the passive film significantly influences the corrosion behavior of the reinforcing steel. The relationship between the surface characteristics and electrochemical performance of the passive reinforcing steel was investigated in simulated alkali-activated slag pore (SSP) solution in this paper. An adsorption aluminate/silicate layer (60 nm) generated on the reinforcing steel surface. Further, due to the influence of S2−, less compact passive film (containing FeS in the inner film) formed, leading to lower passive film resistance. However, the reinforcement still presented slightly higher charge transfer resistance due to the barrier effect of the adsorption layer in SSP solution.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 08 Mar 2022 01:27
Last Modified: 30 Mar 2022 05:15
Uncontrolled Keywords: C. Passivity; A. Steel reinforced concrete; B. AFM; B. XPS; B. EIS
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401607 Metals and alloy materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1016/j.corsci.2021.109657
URI: http://eprints.usq.edu.au/id/eprint/46431

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