Corrosion behavior of modified cement-based coated steel rebar subjected to different levels of tensile loads

doi:10.1016/j.jobe.2024.109707

	Corrosion behavior of modified cement-based coated steel rebar subjected to different levels of tensile loads
	Fan, Liang 1; Hou, Guanhao 1; Liao, Xiufen 2; Shang, Huaishuai 3; Liu, Nazhen 1; Lu, Dongzhu 1; Zhao, Xia1 ; Sun, Congtao 1
	2024-08-15
发表期刊	JOURNAL OF BUILDING ENGINEERING
卷号	91 页码:24
通讯作者	Liao, Xiufen([email protected]) ; Shang, Huaishuai()
摘要	Polymer-modified cement-based coating can provide corrosion protection for steel rebar. However, after the action of the tensile load, the connection between the polymer and the cement matrix was weakened, thus reducing its corrosion resistance. In this study, silica fume, nano-SiO2, and corrosion inhibitor were used to modify EVA (Ethylene Vinyl Acetate Copolymer) and cement-based coatings. Electrochemical experiments were used to evaluate the corrosion behavior of coated steel rebar after the action of different levels of tensile loads, and microscopic characterization and porosity experiments were applied to analyze the changes of microscopic properties of the coatings. The experimental results show that silica fume and nano-SiO2 produce more high-strength C-S-H gels through hydration reaction to improve the tensile properties and compactness of the coating, thus reducing the porosity and chloride ion permeability of the coating after tension. Tetrabasic-modified cement-based coated steel rebar with EVA, silica fume, nano-SiO2, and amino-alcohol corrosion inhibitor displayed the highest coating resistance and the lowest corrosion current density under the action of tensile load. Experimental results proves that nano-SiO2 enhances the tensile properties of the coating. The addition of corrosion inhibitor can further improve the compactness of the coating under tension, hinder the formation of chloride ion transport channel, and adsorb on the surface of steel rebar to improve the corrosion resistance of steel rebar.
关键词	Cement-based coating EVA Nano-SiO2 Corrosion Steel rebar Corrosion inhibitor Corrosion Steel rebar
DOI	10.1016/j.jobe.2024.109707
收录类别	SCI
语种	英语
资助项目	Qingdao Natural Science Foundation Program[23-2-1-94-zyyd-jch]; Shandong Provincial Natural Science Foundation Youth Program[ZR2023QE015]; Shandong Excellent Youth Science Foundation Program[2023HWYQ-100]; Taishan Scholars Program
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:001325844100001
出版者	ELSEVIER
WOS关键词	NANO-SILICA ; MECHANICAL-PROPERTIES ; CONCRETE ; INHIBITOR
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/199358
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Liao, Xiufen; Shang, Huaishuai
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Guangxi Acad Sci, Inst Marine Corros Protect, Guangxi Key Lab Marine Environm Sci, Nanning 530007, Peoples R China 3.Qingdao Univ Technol, Sch Civil Engn, Qingdao 266033, Peoples R China
推荐引用方式 GB/T 7714	Fan, Liang,Hou, Guanhao,Liao, Xiufen,et al. Corrosion behavior of modified cement-based coated steel rebar subjected to different levels of tensile loads[J]. JOURNAL OF BUILDING ENGINEERING,2024,91:24.
APA	Fan, Liang.,Hou, Guanhao.,Liao, Xiufen.,Shang, Huaishuai.,Liu, Nazhen.,...&Sun, Congtao.(2024).Corrosion behavior of modified cement-based coated steel rebar subjected to different levels of tensile loads.JOURNAL OF BUILDING ENGINEERING,91,24.
MLA	Fan, Liang,et al."Corrosion behavior of modified cement-based coated steel rebar subjected to different levels of tensile loads".JOURNAL OF BUILDING ENGINEERING 91(2024):24.