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Evolution of the Corrosion Product Film and Its Effect on the Erosion-Corrosion Behavior of Two Commercial 90Cu-10Ni Tubes in Seawater
Ekerenam, Okpo O.1,2; Ma, Ai-Li1; Zheng, Yu-Gui1; He, Si-Yu1; Okafor, Peter C.3
Corresponding AuthorMa, Ai-Li(alma@imr.ac.cn)
2018-11-01
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume31Issue:11Pages:1148-1170
AbstractThe composition and structural evolution of the corrosion product film of two commercial 90Cu-10Ni tubes, namely Tube A and Tube B, after being immersed in natural seawater for 1, 3, and 6months were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, and its effect on the erosion-corrosion behavior of the tubes was determined through a rotating cylinder electrode system using various electrochemical techniques. For the freshly polished samples used as contrast samples, the flow velocity mainly enhanced the cathodic reaction at low flow velocities while both the anodic and the cathodic reactions were remarkably accelerated at higher flow velocities. The corrosion product films formed on the two commercial 90Cu-10Ni tubes after being immersed in seawater for up to 6months are of a complex three-layer or multilayer structure. The structural evolution of the films is out of sync for the two tubes. A continuous residual substrate layer depleted of Ni was observed in the inner layer of the films on Tube B after 30, 90, and 180days' immersion, while it was observed in the film on Tube A only after 180days' immersion. The nature of the inner layer plays a crucial role in the erosion-corrosion resistance of the 90Cu-10Ni tubes at higher flow velocity. The film with a compact and continuous inner layer of Cu2O doped with Ni2+ and Ni3+ which bonds firmly with the substrate could survive and even get repaired with the increased flow velocity. The film on Tube B possessing a hollow and discontinuous inner layer composed of the residual substrate was degraded rapidly with increasing rotation speed in spite of its quite good resistance at the stagnant or lower speed conditions.
KeywordCopper-nickel alloy Seawater immersion Erosion-corrosion Corrosion product film Flow velocity
Funding OrganizationNational Natural Science Foundation of China ; National Environmental Corrosion Platform
DOI10.1007/s40195-018-0745-1
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51601200] ; National Environmental Corrosion Platform[2005DKA10400]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000444031000004
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129374
Collection中国科学院金属研究所
Corresponding AuthorMa, Ai-Li
Affiliation1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
2.Univ Chinese Acad Sci UCAS, Beijing 100049, Peoples R China
3.Univ Calabar, Dept Pure & Appl Chem, PMB 1115, Calabar, Crs, Nigeria
Recommended Citation
GB/T 7714
Ekerenam, Okpo O.,Ma, Ai-Li,Zheng, Yu-Gui,et al. Evolution of the Corrosion Product Film and Its Effect on the Erosion-Corrosion Behavior of Two Commercial 90Cu-10Ni Tubes in Seawater[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2018,31(11):1148-1170.
APA Ekerenam, Okpo O.,Ma, Ai-Li,Zheng, Yu-Gui,He, Si-Yu,&Okafor, Peter C..(2018).Evolution of the Corrosion Product Film and Its Effect on the Erosion-Corrosion Behavior of Two Commercial 90Cu-10Ni Tubes in Seawater.ACTA METALLURGICA SINICA-ENGLISH LETTERS,31(11),1148-1170.
MLA Ekerenam, Okpo O.,et al."Evolution of the Corrosion Product Film and Its Effect on the Erosion-Corrosion Behavior of Two Commercial 90Cu-10Ni Tubes in Seawater".ACTA METALLURGICA SINICA-ENGLISH LETTERS 31.11(2018):1148-1170.
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