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Investigation of the impact of protective layer thickness and chloride ion penetration direction on macro-cell corrosion of reinforcement in mortar columns under marine environment

文献类型：期刊论文

作者Fan, Liang5; Liang, Zongyu1,2; Shen, Wei1; Sun, Baoyin3; Zhang, Rongling4
刊名CONSTRUCTION AND BUILDING MATERIALS
出版日期2025-08-29
卷号489页码:16
关键词Macro-cell corrosion Micro-cell corrosion Direction of chloride ingress Thickness of protective layer
ISSN号0950-0618
DOI10.1016/j.conbuildmat.2025.142197
通讯作者Shen, Wei(shenwei431@gxu.edu.cn)
英文摘要The infiltration of chloride ions into concrete can initiate the de-passivation of steel reinforcement, which in turn triggers macro-cell corrosion. Current research on macro-cell corrosion of marine reinforced concrete rarely accounts for the interactive effects of protective layer thickness and chloride-ion intrusion direction across different corrosion zones. This study conducted electrochemical measurements on four mortar columns located in the simulated marine atmospheric zone, water-level fluctuation zone, and submerged zone for 180 days. The research findings indicate that when chloride ions infiltrate from all four sides, increasing the thickness of protective layer does not reduce microcell corrosion current, whereas restricting chloride ion intrusion direction can. In contrast, under single-sided intrusion, thicker protective layers decrease the corrosion current density. Thicker protective layers increase macro-cell current due to extended ion transmission paths and potential differences. Restricting ion intrusion direction also increases macro-cell current by reducing ion transmission channels. Regardless of the intrusion direction, thicker protective layers increase the proportion of macro-cell corrosion current in the total corrosion current, especially in the water-level fluctuation zone. Lastly, when steel segments in the submerged zone act as macro-anodes, microcell corrosion remains dominant, as indicated by the low ratio of macro-cell corrosion current to total corrosion current which usually does not exceed 0.20.
WOS关键词STEEL CORROSION ; CONCRETE ; BEHAVIOR ; PERFORMANCE ; SURFACE ; FIELD
资助项目National Natural Science Foundation of China[52308307] ; Taishan Scholars Program, Shandong Natural Science Foundation Youth Program[ZR2023QE015] ; Guangxi Science and Technology Program[Guike AA23026007] ; Shandong Excellent Youth Science Foundation Program[2023HWYQ-100] ; China Railway[U2368209] ; Qingdao Natural Science Foundation Program[23-2-1-94-zyyd-jch]
WOS研究方向Construction & Building Technology ; Engineering ; Materials Science
语种英语
WOS记录号WOS:001508657700002
出版者ELSEVIER SCI LTD
源URL[http://ir.qdio.ac.cn/handle/337002/202337]  
专题海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者Shen, Wei
作者单位1.Guangxi Univ, Sch Civil Engn & Architecture, State Key Lab Featured Met Mat & Life cycle Safety, Nanning 530004, Peoples R China
2.Guangxi Acad Sci, Guangxi Acad Marine Sci, Guangxi Key Lab Marine Environm Sci, Nanning, Peoples R China
3.Hohai Univ, Sch Civil & Transportat Engn, Nanjing 210024, Peoples R China
4.Lanzhou Jiaotong Univ, Natl & Prov Joint Engn Lab Rd & Bridge Disaster Pr, Lanzhou 730070, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Liang,Liang, Zongyu,Shen, Wei,et al. Investigation of the impact of protective layer thickness and chloride ion penetration direction on macro-cell corrosion of reinforcement in mortar columns under marine environment[J]. CONSTRUCTION AND BUILDING MATERIALS,2025,489:16.
APA Fan, Liang,Liang, Zongyu,Shen, Wei,Sun, Baoyin,&Zhang, Rongling.(2025).Investigation of the impact of protective layer thickness and chloride ion penetration direction on macro-cell corrosion of reinforcement in mortar columns under marine environment.CONSTRUCTION AND BUILDING MATERIALS,489,16.
MLA Fan, Liang,et al."Investigation of the impact of protective layer thickness and chloride ion penetration direction on macro-cell corrosion of reinforcement in mortar columns under marine environment".CONSTRUCTION AND BUILDING MATERIALS 489(2025):16.

入库方式： OAI收割

来源：海洋研究所

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