Corrosion Prediction of Coated Steel in Magnesium Cement Concrete Based on Wiener Degradation

被引：0

作者：

Qiao H. ^{[1
,2
]}

Wang P. ^{[1
]}

Li Y. ^{[1
]}

Guo X. ^{[1
]}

Gong W. ^{[1
]}

机构：

[1] Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou

[2] Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining

来源：

Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2019年 / 54卷 / 06期

关键词：

Corrosion; Corrosion current density; Magnesium cement concrete; Reliability; Wiener degradation process;

D O I：

10.3969/j.issn.0258-2724.20170388

中图分类号：

学科分类号：

摘要：

The corrosion of magnesium cement concrete on steel bars limits its widespread application. To solve this problem, coating is proposed to alleviate the corrosion of steel bars and ensure that magnesium cement-reinforced concrete buildings meet the design requirements over their service life. Based on the natural environment of the Western saline soil area, a rapid corrosion test of magnesium oxychloride-coated reinforced concrete was performed using the solution immersion accelerated corrosion test method. Electrochemical tests of magnesium oxychloride-coated reinforced concrete were periodically conducted using an electrochemical workstation. The electrochemical parameter of corrosion current density, which characterises the corrosion of a coated steel bar, was used as the degradation index; then, a reliability model was built on the basis of the Wiener degradation process, and the corrosion of a coated steel bar was predicted. The results show that the corrosion reliability function of a steel bar coated with magnesium cement-reinforced concrete can be obtained by using the corrosion current density as a durability degradation index, and the coated steel bar reaches moderate corrosion at approximately 30 000 d. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.

引用

页码：1252 / 1257

页数：5

共 13 条

[1] Wang L., Gan H., Yu F., Et al., Salted soil and its development in Northwest China, Journal of Hydraulic Engineering, 46, 6, pp. 90-95, (2001)
[2] Xue J., One Belt And One Road": great strategy, grand layout, great era, China Strategic Emerging Industry, pp. 50-57, (2015)
[3] Wen J., Yu H., Wu C., Et al., Hydration kinetic and influencing parameters in hydration process of magnesium oxychloride cement, Journal of The Chinese Ceramic Society, 41, 5, pp. 588-596, (2013)
[4] Mazuranic C., Billinski H., Matkovic B., Reaction products in the system MgCL<sub>2</sub>-NaOH-H<sub>2</sub>O, Journal of the American Ceramic Society, 65, 10, pp. 523-526, (1982)
[5] Qiao H., Gong W., Cheng Q., Et al., Durability of magnesium cement reinforced concrete in saline soil area, Journal of China Coal Society, 40, pp. 346-352, (2015)
[6] Qiao H., Gong W., Chen G., Et al., Experimental study on corrosion of steel bar in magnesium cement concrete based on polarization curves, Journal of Huazhong University of Science and Technology (Nature Science), 44, 1, pp. 6-10, (2016)
[7] Qiao H., Gong W., Gao S., Et al., Electrochemical corrosion of steel bar in the magnesium cement concrete, Materials Science and Technology, 24, 1, pp. 63-69, (2016)
[8] Qiao H., Gong W., Wang P., Et al., Experimental study on steel reinforcement protection in magnesium oxychloride cement concrete under sulfate environment, Journal of Southwest Jiaotong University, 52, 2, pp. 247-253, (2017)
[9] Zhu L., Zuo H., Cai J., Performance reliability prediction for civil aviation aircraft engine based on Wiener process, Journal of Aerospace Powe, 28, 5, pp. 1006-1012, (2013)
[10] Wang B., Zheng Q., Guo H., Economic value assessment of forest species diversity conservation in China based on the Shannon-Wiener index, Forest Research, 21, 2, pp. 268-274, (2008)

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