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Comparison of cathodic protection processes of 40% zinc-rich coatings under immersion and atmospheric conditions: Protection for defective areas

文献类型：期刊论文

作者Xia, Wenting1,4; Chen, Zhiwei1,4; Zhang, Guoqing2; Zhang, Wei1,4; Liu, Fuguo2; Yao, Caiqi1,4; Lin, Zhifeng1,4; Li, Weihua1,3,4
刊名ELECTROCHIMICA ACTA
出版日期2021-07-20
卷号385页码:12
ISSN号0013-4686
关键词Zinc-rich coatings Cathodic protection Thin liquid films Wire beam electrode Electrochemical impedance spectroscopy
DOI10.1016/j.electacta.2021.138450
通讯作者Zhang, Wei(zhangw286@mail.sysu.edu.cn)
英文摘要The cathodic protection of defective areas of low-content (40 wt%) zinc-rich coatings (ZRCs) was investigated under immersion and atmospheric thin liquid film conditions using a wire beam electrode (WBE). The coatings were characterised by electrochemical impedance spectroscopy, scanning electron microscopy, and surface morphology analysis. Under the two conditions, the ZRCs did not polarise the entire electrode to the protection potential interval specified by the cathodic protection standard. Due to the high dissolved oxygen content in the thin liquid film under the atmospheric condition, the zinc powder on the coating surface was rapidly activated. This resulted in a higher protection current for the steel substrate in the defect area of the coating, and metal corrosion was effectively controlled. However, corrosion in the defect area of the coating persisted under immersion although the zinc powder in the coatings also provided a protection current. In contrast to conventional sheet electrodes, WBE can provide information on surface current density distribution and associated processes such as zinc powder activation, polarisation, and polarity reversal of the substrate metal during the cathodic protection stage of ZRCs. (c) 2021 Elsevier Ltd. All rights reserved.
资助项目National Natural Science Foundation of China[21203034] ; National Natural Science Foundation of China[51771057] ; GF research and cultivation project of Sun Yat-sen University[7611018843406] ; National Science and Technology Resources Investigation Program of China[2019FY101400]
WOS研究方向Electrochemistry
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000651778000009
源URL[http://ir.qdio.ac.cn/handle/337002/171016]  
专题海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者Zhang, Wei
作者单位1.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519082, Peoples R China
2.Offshore Oil Engn Co Ltd, Tianjin 300451, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
4.Sun Yat Sen Univ, Sch Chem Engn & Technol, Zhuhai 519082, Peoples R China
推荐引用方式
GB/T 7714		 Xia, Wenting,Chen, Zhiwei,Zhang, Guoqing,et al. Comparison of cathodic protection processes of 40% zinc-rich coatings under immersion and atmospheric conditions: Protection for defective areas[J]. ELECTROCHIMICA ACTA,2021,385:12.
APA Xia, Wenting.,Chen, Zhiwei.,Zhang, Guoqing.,Zhang, Wei.,Liu, Fuguo.,...&Li, Weihua.(2021).Comparison of cathodic protection processes of 40% zinc-rich coatings under immersion and atmospheric conditions: Protection for defective areas.ELECTROCHIMICA ACTA,385,12.
MLA Xia, Wenting,et al."Comparison of cathodic protection processes of 40% zinc-rich coatings under immersion and atmospheric conditions: Protection for defective areas".ELECTROCHIMICA ACTA 385(2021):12.

入库方式： OAI收割

来源：海洋研究所

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