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CORROSION BEHAVIOR OF LONG-TIME IMMERSED RUSTED CARBON STEEL IN FLOWING SEAWATER
Peng Xin1; Wang Jia1,2; Shan Chuan1; Wang Haijie1; Liu Zaijian1; Zou Yan3
Corresponding AuthorWang Jia(jwang@ouc.edu.cn)
2012-10-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume48Issue:10Pages:1260-1266
AbstractThe rust/metal structure is one of the multiphase and multiple interface complex systems. The corrosion under rust is the uppermost and longest form of metallic corrosion evolution process. It is difficult to accurately determine the electrochemical parameters because the existence of rust complicates the electrochemical corrosion process. Based on the result of the previous studies of quiescent seawater, the weight-loss method and different electrochemical tests such as polarization curves (PC), electrochemical impedance spectra (EIS) and linear polarization resistance (LPR) were carried out to study the corrosion behavior of A3 carbon steel immersed in flowing seawater for about 280 d. After very short immersing time, there is a thin yellow rust layer on carbon steel, but as time prolonged, the yellow corrosion products are rushed away quickly, and a tense black rust layer cover about the whole electrode. The corrosion rate obtained by weight-loss method show a steady decline and keep stable after about 84 d, but it is higher than that of the static state system data. The cathodic polarization curves show an obvious reduction current peak at about -950 mV, which makes a remarkable overestimating of the cathodic corrosion current. Polarization resistance (R-p), determined by LPR and EIS, increases during the merely short-initial immersion period, then, it decreases gradually with immersion time. This means that the corrosion rate determined by electrochemical tests shows an another pattern compared with the weight-loss result. After a very short immersion time (about 14 d), there is a remarkable deviation between the weight-loss and electrochemical test results, and the longer immersed the greater of this deviation is. So no matter in static state or flowing seawater, electrochemical methods can not get an accurate corrosion rate of carbon steel. And reliable electrochemical measurement and analysis for rusted steel need much more attention.
Keywordcarbon steel flowing seawater rust layer corrosion rate deviation
Funding OrganizationNational Natural Science Foundation of China
DOI10.3724/SP.J.1037.2012.00258
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50971118]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000310823200015
PublisherSCIENCE PRESS
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/125849
Collection中国科学院金属研究所
Corresponding AuthorWang Jia
Affiliation1.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China
2.State Key Lab Corros & Protect Met, Shenyang 110016, Peoples R China
3.Shandong Acad Sci, Shandong Prov Key Lab Ocean Environm Monitoring T, Inst Oceanog Instrumentat, Qingdao 266100, Peoples R China
Recommended Citation
GB/T 7714
Peng Xin,Wang Jia,Shan Chuan,et al. CORROSION BEHAVIOR OF LONG-TIME IMMERSED RUSTED CARBON STEEL IN FLOWING SEAWATER[J]. ACTA METALLURGICA SINICA,2012,48(10):1260-1266.
APA Peng Xin,Wang Jia,Shan Chuan,Wang Haijie,Liu Zaijian,&Zou Yan.(2012).CORROSION BEHAVIOR OF LONG-TIME IMMERSED RUSTED CARBON STEEL IN FLOWING SEAWATER.ACTA METALLURGICA SINICA,48(10),1260-1266.
MLA Peng Xin,et al."CORROSION BEHAVIOR OF LONG-TIME IMMERSED RUSTED CARBON STEEL IN FLOWING SEAWATER".ACTA METALLURGICA SINICA 48.10(2012):1260-1266.
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