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Influence of chloride ion on depassivation of passive film on galvanized steel bars in concrete pore solution
Zheng, Haibing1,2,3; Dai, Jian-Guo2; Li, Weihua1; Poon, Chi Sun2
2018-03-30
Source PublicationCONSTRUCTION AND BUILDING MATERIALS
ISSN0950-0618
Volume166Pages:572-580
Corresponding AuthorLi, Weihua(liweihue@qdio.ac.cn) ; Poon, Chi Sun(cecspoon@polyu.edu.hk)
AbstractThis work aimed at studying the depassivation mechanism of the passive film on galvanized steel bar in concrete pore solution with different concentrations of chloride ion. The results showed that in a saturated Ca(OH)(2) solution, the critical chloride values for the depassivation of the passive films formed on galvanized steel bars and zinc metal specimens were 0.2 M and 0.3 M respectively. When the Cl- concentration was lower than the critical value, the donor density of the passive film increased and thus the protective property reduced with increasing the concentration of chloride ion, which could be interpreted by the point defect model (PDM). The corrosion products formed on the galvanized steel surface could inhibit the further ingress of the chloride ions and enhance the protective property, while such effect was not obvious for the zinc metal. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordChloride ions Passive film Corrosion Galvanized steel Concrete pore solution
DOI10.1016/j.conbuildmat.2018.01.174
Indexed BySCI
Language英语
Funding ProjectHong Kong Branch of National Engineering Research Center for Steel Construction[1-BBYP] ; Hong Kong Polytechnic University[1-ZVGE] ; National Science Fund for Distinguished Young Scholars[51525903]
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000428491300053
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158463
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorLi, Weihua; Poon, Chi Sun
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zheng, Haibing,Dai, Jian-Guo,Li, Weihua,et al. Influence of chloride ion on depassivation of passive film on galvanized steel bars in concrete pore solution[J]. CONSTRUCTION AND BUILDING MATERIALS,2018,166:572-580.
APA Zheng, Haibing,Dai, Jian-Guo,Li, Weihua,&Poon, Chi Sun.(2018).Influence of chloride ion on depassivation of passive film on galvanized steel bars in concrete pore solution.CONSTRUCTION AND BUILDING MATERIALS,166,572-580.
MLA Zheng, Haibing,et al."Influence of chloride ion on depassivation of passive film on galvanized steel bars in concrete pore solution".CONSTRUCTION AND BUILDING MATERIALS 166(2018):572-580.
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