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Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution
Ekerenam, Okpo O.; Ma, Aili; Zheng, Yugui; Emori, Wilfred; Ma, AL (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 62 Wencui Rd, Shenyang 110016, Peoples R China.
2017-04-01
Source PublicationJOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
ISSN1059-9495
Volume26Issue:4Pages:1701-1716
AbstractInvestigation on the electrochemical behavior and corrosion product films formed on three 90Cu-10Ni tubes designated as Tubes A, B and C from three different manufacturers with different service lives were carried out using electrochemical techniques, SEM, XRD and XPS after immersion in 3.5 wt.% NaCl solution. The results of polarization curve measurements showed noticeable decrease in the corrosion current densities (I (corr)) of the three tubes with immersion time, and the I (corr) of Tube C was comparatively lower than those of Tubes A and B at early immersion period. EIS measurements revealed duplex film layers on the surface of the samples with the inner film formation occurring at different times for different tubes as the film resistance R (f2) revealed the formation of the inner compact layer in Tube C after 15-day immersion and in Tubes A and B after 30 days. Tube C showed better corrosion resistance which is due to early formation of the inner compact oxide film. The XPS analysis revealed Ni enrichment on the surface film of the three samples but Ni depletion as the immersion time is increased.; Investigation on the electrochemical behavior and corrosion product films formed on three 90Cu-10Ni tubes designated as Tubes A, B and C from three different manufacturers with different service lives were carried out using electrochemical techniques, SEM, XRD and XPS after immersion in 3.5 wt.% NaCl solution. The results of polarization curve measurements showed noticeable decrease in the corrosion current densities (I (corr)) of the three tubes with immersion time, and the I (corr) of Tube C was comparatively lower than those of Tubes A and B at early immersion period. EIS measurements revealed duplex film layers on the surface of the samples with the inner film formation occurring at different times for different tubes as the film resistance R (f2) revealed the formation of the inner compact layer in Tube C after 15-day immersion and in Tubes A and B after 30 days. Tube C showed better corrosion resistance which is due to early formation of the inner compact oxide film. The XPS analysis revealed Ni enrichment on the surface film of the three samples but Ni depletion as the immersion time is increased.
description.department[ekerenam, okpo o. ; ma, aili ; zheng, yugui ; emori, wilfred] chinese acad sci, inst met res, key lab nucl mat & safety assessment, 62 wencui rd, shenyang 110016, peoples r china
KeywordCorrosion And Wear Corrosion Product Film Eis Nonferrous Metals Oxidation Polarization Curves Xps
Subject AreaMaterials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China [Y7F2131111]; National Environmental Corrosion Platform [2005DKA10400]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78205
Collection中国科学院金属研究所
Corresponding AuthorMa, AL (reprint author), Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 62 Wencui Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Ekerenam, Okpo O.,Ma, Aili,Zheng, Yugui,et al. Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2017,26(4):1701-1716.
APA Ekerenam, Okpo O.,Ma, Aili,Zheng, Yugui,Emori, Wilfred,&Ma, AL .(2017).Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,26(4),1701-1716.
MLA Ekerenam, Okpo O.,et al."Electrochemical Behavior of Three 90Cu-10Ni Tubes from Different Manufacturers After Immersion in 3.5% NaCl Solution".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 26.4(2017):1701-1716.
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