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Effect of Na+ and Ca2+on chloride binding behavior of LDHs and AFm

文献类型：期刊论文

作者Sun, Ming2,3; Sun, Congtao2,3; Pan, Zihan1; Duan, Jizhou2,3; Hou, Baorong2,3
刊名CONSTRUCTION AND BUILDING MATERIALS
出版日期2024-11-15
卷号451页码:10
关键词LDHs AFm Chloride adsorption Chloride desorption Stability
ISSN号0950-0618
DOI10.1016/j.conbuildmat.2024.138587
通讯作者Sun, Congtao(suncongtao@qdio.ac.cn) ; Hou, Baorong(baoronghou@163.com)
英文摘要The chloride binding of hydrotalcite is significant for delaying steel reinforcement corrosion. This study investigated the chloride binding capacity of hydrotalcite, including CaAl-NO3 layered double hydroxides (LDHs) and monosulfoaluminate (AFm), under NaCl and CaCl2 penetration, respectively. It quantitatively characterized the total bound chloride content, strongly bound chloride content, and not-strongly bound chloride content as the chloride concentration increased. The results indicated that the total bound chloride content by both LDHs and AFm in CaCl2 solution was higher than in NaCl solution. The increase in LDHs was attributed to Ca2+ suppressing LDHs dissolution and reducing competitive adsorption between OH- and chloride ions. For AFm, the increase was due to Ca2+ promoting AFt decomposition and inhibiting AFm dissolution. During chloride desorption process in deionized water, the stability of chloride binding products formed by LDHs was significantly higher than that of AFm. This difference was primarily due to the involvement of SO4 2- in phase transformation, leading to AFt formation and facilitating the decomposition of Kuzel's salt and Friedel's salt formed by AFm. The strongly bound chloride ratio of AFm in CaCl2 solution was generally lower than in NaCl solution due to gypsum dissolution and subsequent release of SO42-.
资助项目National Natural Science Foundation of China[52378276] ; Guangxi Science and Technology Program[Guike AA23026007]
WOS研究方向Construction & Building Technology ; Engineering ; Materials Science
语种英语
WOS记录号WOS:001340195200001
出版者ELSEVIER SCI LTD
源URL[http://ir.qdio.ac.cn/handle/337002/199573]  
专题海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者Sun, Congtao; Hou, Baorong
作者单位1.Guangxi Acad Sci, Inst Marine Corros Protect, Guangxi Key Lab Marine Environm Sci, Nanning 530007, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Sun, Ming,Sun, Congtao,Pan, Zihan,et al. Effect of Na+ and Ca2+on chloride binding behavior of LDHs and AFm[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,451:10.
APA Sun, Ming,Sun, Congtao,Pan, Zihan,Duan, Jizhou,&Hou, Baorong.(2024).Effect of Na+ and Ca2+on chloride binding behavior of LDHs and AFm.CONSTRUCTION AND BUILDING MATERIALS,451,10.
MLA Sun, Ming,et al."Effect of Na+ and Ca2+on chloride binding behavior of LDHs and AFm".CONSTRUCTION AND BUILDING MATERIALS 451(2024):10.

入库方式： OAI收割

来源：海洋研究所

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