Corrosion Rate of Stainless Steel Rebar in Coral Concrete Prepared with Seawater

被引：0

作者：

Feng X. ^{[1
,2
]}

Lu X. ^{[1
,2
]}

Yang Y. ^{[3
]}

Luo F. ^{[1
,2
]}

机构：

[1] Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing

[2] College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing

[3] College of Water Conservancy Engineering, Wanjiang University of Technology, Maanshan

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2021年 / 24卷 / 06期

关键词：

Coral concrete; Corrosion rate; Electrochemical impedance spectroscopy; Linear polarization; Stainless steel rebar;

D O I：

10.3969/j.issn.1007-9629.2021.06.026

中图分类号：

学科分类号：

摘要：

For investigating the long‑term corrosion resistance of stainless steel rebar in coral concrete, the corrosion current densities of stainless steel rebar type 304 and 2205 were measured by applying the linear polarization resistance, electrochemical impedance spectroscopy, and polarization curve methods in the coral concrete in 3.5% NaCl solution for 750 days. Simultaneously, the corrosion current density was compared to that of the carbon steel in the similar strength grade of ordinary concrete. The results suggest that the corrosion current density of the stainless steel rebar is lower than 0.10 μA/cm2, and maintained passivation in the coral concrete after 750 days in 3.5% NaCl solution. In comparison, the corrosion current density of stainless steel rebar type 2205 is lower than that of the 304 counterparts. Moreover, the corrosion current density of the carbon steel rebar is 10 times higher than that of the stainless steel rebar with the result that the former samples are severely corroded. In general, the corrosion state calculated from the linear polarization resistance is most consistent with the observed. Therefore, the linear polarization resistance method is proposed to test the corrosion rate of rebar in concrete. © 2021, Editorial Department of Journal of Building Materials. All right reserved.

引用

页码：1322 / 1327

页数：5

共 17 条

[1]

ZHAO Yanlin, HAN Chao, ZHANG Shuanzhu, Et al., Experimental study on the compression age strength of seawater coral concrete, Concrete, 2, pp. 43-45, (2011)

[2]

WANG Q K, LI P, TIAN Y P, Et al., Mechanical properties and microstructure of Portland cement concrete prepared with coral reef sand[J], Journal of Wuhan University of Technology(Materials Science Edition), 31, 5, (2016)

[3]

WANG A G, LYU B C, ZHANG Z H, Et al., The development of coral concretes and their upgrading technologies: A critical review, Construction and Building Materials, 187, (2018)

[4]

KAKOOEI S, AKIL H M, DOLATI A, Et al., The corrosion investigation of rebar embedded in the fibers reinforced concrete, Construction and Building Materials, 35, 10, (2012)

[5]

CHEN Long, QU Yu, TANG Yanbing, Et al., Passivation behavior of two kinds of stainless steel reinforcing bars in simulated concrete pore solution, Journal of Materials Protection, 46, 10, (2013)

[6]

PEREZ-QUIROZ J T, TERAN J, HERRERA M J, Et al., Assessment of stainless steel reinforcement for concrete structures rehabilitation, Journal of Constructional Steel Research, 64, 11, (2008)

[7]

FENG Xingguo, SHI Ruilong, XU Yiwen, Et al., Corrosion resistance of stainless steel rebar in coral concrete, Proceedings of the 18th China Ocean (Shore) Engineering Symposium, pp. 736-740, (2017)

[8]

FENG X G, ZHANG L Y, ZHANG J, Et al., Effect of aluminum tri‑polyphosphate on corrosion behavior of reinforcing steel in seawater prepared coral concrete[J], Journal of Wuhan University of Technology(Materials Science Edition), 34, 4, (2019)

[9]

CHEN X D, WU S X., Influence of water‑to‑cement ratio and curing period on pore structure of cement mortar, Construction and Building Materials, 38, pp. 804-812, (2013)

[10]

CHEN D, LIAO Y D, JIANG C H, Et al., The mechanical properties of coastal soil treated with cement[J], Journal of Wuhan University of Technology(Materials Science Edition), 28, 6, pp. 1155-1160

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