Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete

doi:10.1007/s12205-020-1970-5

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete
	Wang, Penghui 1; Qiao, Hongxia 1,2; Chen, Kefan 1; Li, Yuanke 1; Feng, Qiong 1
刊名	KSCE Journal of Civil Engineering
	2020-07-01
卷号	24 期号:7 页码:2120-2131
关键词	Bars (metal) Concretes Current density Magnesium compounds Polarization Steel corrosion Steel testing Accelerated corrosion tests Corrosion current densities Electrochemical test Long term durability Magnesium oxychloride Magnesium oxychloride cement Polarization curves Polarization impedance
ISSN号	12267988
DOI	10.1007/s12205-020-1970-5
英文摘要	The solution to the problem of corrosion of the steel bars in magnesium oxychloride cement concrete (MOCC) is to apply a coating that protects the steel. To investigate the coating’s long- term protective effect on the steel, a solution immersion accelerated corrosion test was carried out on coated reinforced MOCC for up to 2,160 days. Electrochemical tests were conducted every 90 days to measure the polarization curve and AC impedance during the steel bars’ corrosion process. Then, the corrosion current density that characterizes the corrosion of a coated steel bar was used as a degradation index, and the time to the coated steel bar’s corrosion was predicted based on the Wiener function. It was concluded that after 2,160 days of solution immersion, the coated steel bars’ corrosion current density was 0.063 µA·cm−2, indicating that the coating protected the steel bars in MOCC from corrosion well. Thdroughout the immersion process, the specimen’s corrosion current density showed a steady and increasing trend, and its polarization impedance showed a volatile growth trend. The degradation of the coated steel bars also obeyed the Wiener degradation process, and the bars reached a severely rusted state at 21,800d with a corrosion time of R0.6(t) is 10,650d. © 2020, Korean Society of Civil Engineers.
WOS研究方向	Engineering
语种	英语
出版者	Springer Verlag
WOS记录号	WOS:000534835500001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150999]
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining; 810008, China
推荐引用方式 GB/T 7714	Wang, Penghui,Qiao, Hongxia,Chen, Kefan,et al. Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete[J]. KSCE Journal of Civil Engineering,2020,24(7):2120-2131.
APA	Wang, Penghui,Qiao, Hongxia,Chen, Kefan,Li, Yuanke,&Feng, Qiong.(2020).Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete.KSCE Journal of Civil Engineering,24(7),2120-2131.
MLA	Wang, Penghui,et al."Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete".KSCE Journal of Civil Engineering 24.7(2020):2120-2131.