海洋潮汐区暴露700 d带裂缝混凝土中耐蚀钢筋的锈蚀行为

doi:10.11896/cldb.19030028

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Abstract Cracks are the main causes for the reduction of bearing capacity and durability of concrete structures. In order to study the corrosion behavior and influence of crack width, reinforced concrete specimens with different crack parameters were placed in Wheat Island tidal zone for 700 d. Moreover, the corrosion behavior of steel bars were investigated by electrochemical impedance spectroscopy, as well as fitting and calculating the corrosion current density and corrosion rate. And the depassivation time was calculated by linear fitting of the polarization resistance. The results show that: When the crack width is less than 0.15 mm, the steel bars will not be affected by the crack width while concrete with small crack has a certain self-healing ability. When the crack width exceeds 0.15 mm, the corrosion rate of the steel bar accelerates with the increase of the concrete crack width. Compared to concrete specimens with single crack, the concrete specimens with double cracks are more likely to corrode. The concrete specimen with longitudinal crack is more susceptible to corrosion compared with that of transverse crack while the crack width is same.

Key words： crack steel corrosion corrosion-resistant steel marine

Published: 25 April 2020

CLC number:

TU528.1

Fund:This work was financially supported by the National Natural Science Foundation of China (U1806225, 51709253) and Key R & D Project of Shandong Province (2018GHY115020).

About author:: Guangyan Fengreceived his B.S. degree from Shandong Agricultural University in 2017. He is currently pursuing his Master’s degree at School of Civil Engineering, Qingdao University of Technology under the supervision of Prof. Zuquan Jin. His research interesthas focused on durability performance of concrete in marine environment.
Zuquan Jin is currently a full professor in Qingdao University of Technology and doctoral supervisor. He received his Ph.D. degree from Southeast University in 2006. From 2009 to 2011, he worked as a postdoctoral researcher in the institute of oceanology, Chinese Aca-demy of Science. From 2014 to 2015, he visited University College London and once won the “Huo Yingdong youth teacher award”. His research interests mainly focus on corrosion and protection technologies of reinforced concrete in marine environment.

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	FENG Guangyan
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Cite this article:

FENG Guangyan,JIN Zuquan,XIONG Chuansheng, et al. Corrosion Behavior of Corrosion-resistant Steel in Cracked Concrete Exposed to Marine Tidal Area for 700 Days[J]. Materials Reports, 2020, 34(8): 8064-8070.

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http://www.mater-rep.com/EN/10.11896/cldb.19030028 OR http://www.mater-rep.com/EN/Y2020/V34/I8/8064

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