Journal
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
Volume 24, Issue 1, Pages 64-74Publisher
SPRINGER
DOI: 10.1007/s12613-017-1379-4
Keywords
steel reinforced concrete; low alloy steel; low carbon steel; steel corrosion; corrosion resistance
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Funding
- National Natural Science Foundation of China [51208098, 51678144]
- National Basic Research Program of China [2015CB655100]
- Natural Science Foundation of Jiangsu Province [BK20161420]
- Industry-University Research Cooperative Innovation Fund of Jiangsu Province [BY2013091]
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Electrochemical impedance spectroscopy, cyclic potentiodynamic polarization measurements, and scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy were used to investigate the influence of mill scale and rust layer on the passivation capability and chloride-induced corrosion behaviors of conventional low-carbon (LC) steel and low-alloy (LA) steel in simulated concrete pore solution. The results show that mill scale exerts different influences on the corrosion resistance of both steels at various electrochemical stages. We propose that the high long-term corrosion resistance of LA steel is mainly achieved through the synergistic effect of a gradually formed compact, adherent and well-distributed Cr-enriched inner rust layer and the physical barrier protection effect of mill scale.
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