Influence of mill scale and rust layer on the corrosion resistance of low-alloy steel in simulated concrete pore solution

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• 作者：Jin-jie Shi ; Jing Ming
• 关键词：steel reinforced concrete ; low alloy steel ; low carbon steel ; steel corrosion ; corrosion resistance
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：24
• 期：1
• 页码：64-74
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science, general; Metallic Materials; Characterization and Evaluation of Materials; Ceramics, Glass, Composites, Natural Materials; Surfaces and Interfaces, Thin Films; Tribology, Corrosion
• 出版者：University of Science and Technology Beijing
• ISSN：1869-103X
• 卷排序：24

文摘

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.