In situ 3D monitoring of corrosion on carbon steel and ferritic stainless steel embedded in cement paste |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, United States;2. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States;3. Department of Materials, Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Croatia;4. Department of Civil Engineering, Middle East Technical University, 06800 Ankara, Turkey;1. Technical University of Denmark (DTU), Department of Civil Engineering, Kgs. Lyngby, Denmark;2. University of the Witwatersrand, School of Civil and Environmental Engineering, Johannesburg, South Africa;3. Norwegian University of Science and Technology (NTNU), Department of Structural Engineering, Trondheim, Norway;1. Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, Jiangsu, China;2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China;3. School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;1. Norwegian University of Science and Technology, Department of Structural Engineering, Richard Birkelandsvei 1a, 7491 Trondheim, Norway;2. ETH Zurich, Institute for Building Materials (IfB), Stefano-Franscini-Platz 3, 8093 Zurich, Switzerland;3. Swiss Society for Corrosion Protection (SGK), Technoparkstrasse 1, 8005 Zurich, Switzerland;4. University of Cagliari, Department of Chemical and Geological Science, 09100 Monserrato (CA), Italy;5. Norwegian Public Roads Administration, Brynsengfaret 6A, 0667 Oslo, Norway |
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| Abstract: | In a X-ray microcomputed tomography study, active corrosion was induced by galvanostatically corroding steel embedded in cement paste. The results give insight into corrosion product build up, crack formation, leaching of products into the cracks and voids, and differences in morphology of corrosion attack in the case of carbon steel or stainless steel reinforcement. Carbon steel was homogeneously etched away with a homogeneous layer of corrosion products forming at the steel/cement paste interface. For ferritic stainless steel, pits were forming, concentrating the corrosion products locally, which led to more extensive damage on the cement paste cover. |
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| Keywords: | A Steel reinforced concrete A Stainless steel B Galvanostatic C Interfaces C Pitting corrosion |
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