Journal article
A phenomenological model for the chloride threshold of pitting corrosion of steel in simulated concrete pore solutions
Anti-corrosion methods and materials, Vol.58(4), pp.179-189
06/28/2011
Handle:
https://hdl.handle.net/2376/104171
Abstract
Purpose - This work seeks to present a systematic study that aimed to provide quantitative understanding of the fundamental factors that influence the chloride threshold of pitting corrosion of steel in concrete, by conducting a set of laboratory tests to assess the corrosion potential (Ecorr) and pitting potential (Epit) of steel coupons in simulated concrete pore solutions.Design methodology approach - With the aid of artificial neural network, the laboratory data were used to establish a phenomenological model correlating the influential factors (total chloride concentration, chloride binding, solution pH, and dissolved oxygen (DO) concentration) with the pitting risk (characterized by Ecorr−Epit). Three-dimensional response surfaces were then constructed to illustrate such predicted correlations and to shed light on the complex interactions between various influential factors.Findings - The results indicate that the threshold [Cl−] [OH−] of steel rebar in simulated concrete pore solutions is a function of DO concentration, pH and chloride binding, instead of a unique value.Research limitations implications - The limitations and implications of the research findings were also discussed.Practical implications - This research could have significant practical implications in predicting the service life of new or existing reinforced concrete in chloride-laden environments.Originality value - This study further advances the knowledge base relevant to the chloride-induced corrosion of steel rebar in concrete.
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Details
- Title
- A phenomenological model for the chloride threshold of pitting corrosion of steel in simulated concrete pore solutions
- Creators
- Xianming Shi - Corrosion and Sustainable Infrastructure Laboratory, College of Engineering, Western Transportation Institute, Montana State University, Bozeman, Montana, USA and Civil Engineering Department, Montana State University, Bozeman, Montana, USATuan Anh Nguyen - Corrosion and Sustainable Infrastructure Laboratory, College of Engineering, Western Transportation Institute, Montana State University, Bozeman, Montana, USAPrathish Kumar - Corrosion and Sustainable Infrastructure Laboratory, College of Engineering, Western Transportation Institute, Montana State University, Bozeman, Montana, USAYajun Liu - Montana State University
- Publication Details
- Anti-corrosion methods and materials, Vol.58(4), pp.179-189
- Academic Unit
- Department of Civil and Environmental Engineering
- Publisher
- Emerald Group Publishing Limited
- Identifiers
- 99900546964001842
- Language
- English
- Resource Type
- Journal article