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

doi:10.1007/s12205-020-1970-5

IR > 土木工程学院

	Life Prediction and Long-Term Durability of Coated Steel Bars in Magnesium Oxychloride Concrete
	Wang, Penghui 1; Qiao, Hongxia1,2 ; Chen, Kefan 1; Li, Yuanke 1; Feng, Qiong1
	2020-07
发表期刊	KSCE Journal of Civil Engineering
ISSN	12267988
卷号	24 期号:7 页码:2120-2131
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.
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
DOI	10.1007/s12205-020-1970-5
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil
WOS记录号	WOS:000534835500001
出版者	Springer Verlag
EI入藏号	20202108697032
EI主题词	Corrosion resistant coatings
EI分类号	412 Concrete ; 535.1.2 Rolling Mill Practice ; 545.3 Steel ; 701.1 Electricity: Basic Concepts and Phenomena
来源库	WOS
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/150999
专题	土木工程学院
通讯作者	Qiao, Hongxia
作者单位	1.Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China; 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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.

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