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Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property
Alternative TitleMater. Chem. Phys.
Wang, Mingyong1; Wang, Zhi1; Guo, Zhancheng1,2
2014-11-14
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume148Issue:1-2Pages:245-292
AbstractThe anti-corrosion ability of electrodeposited metal films depends on surface structure of films. In this paper, NiW films with or without cracks were electrodeposited by using super gravity field. The structure and corrosion behavior (corrosion resistance and long-term stability) of NiW films were characterized and studies by SEM, XRD, EDS, Tafel and electrochemical impedance spectroscopy (EIS). The dependence and mechanism of corrosion behavior on film structure were discussed. NiW film with long cracks electrodeposited under normal gravity condition (G = 1) consist of hundreds of micron fragments. For NiW films electrodeposited under super gravity field, fragments of NiW films were refined to about 10 - 30 mu m or cracks were eliminated. The anti-corrosion ability for free-crack NiW films was better than that for NiW film with cracks. Meanwhile, corrosion resistances of NiW films without cracks increased with exposure time in NaCl solution. However, the corrosion resistances of NiW film with cracks only increased in the first 24 h, then decreased with exposure time. After 144 h exposure in NaCl solution, corrosion resistance is up to 12.54 k Omega cm(2) for free-crack NiW film. The value is much higher than that (1.56 k Omega cm(2)) for NiW film with cracks. Lots of corrosion pits were only formed on the surface of NiW film with cracks. The excellent anti-corrosion properties of free-crack NiW films are ascribed to homogeneous and compact surface (i.e. free-crack surface and fine grain). (C) 2014 Elsevier B.V. All rights reserved.; The anti-corrosion ability of electrodeposited metal films depends on surface structure of films. In this paper, NiW films with or without cracks were electrodeposited by using super gravity field. The structure and corrosion behavior (corrosion resistance and long-term stability) of NiW films were characterized and studies by SEM, XRD, EDS, Tafel and electrochemical impedance spectroscopy (EIS). The dependence and mechanism of corrosion behavior on film structure were discussed. NiW film with long cracks electrodeposited under normal gravity condition (G = 1) consist of hundreds of micron fragments. For NiW films electrodeposited under super gravity field, fragments of NiW films were refined to about 10 - 30 mu m or cracks were eliminated. The anti-corrosion ability for free-crack NiW films was better than that for NiW film with cracks. Meanwhile, corrosion resistances of NiW films without cracks increased with exposure time in NaCl solution. However, the corrosion resistances of NiW film with cracks only increased in the first 24 h, then decreased with exposure time. After 144 h exposure in NaCl solution, corrosion resistance is up to 12.54 k Omega cm(2) for free-crack NiW film. The value is much higher than that (1.56 k Omega cm(2)) for NiW film with cracks. Lots of corrosion pits were only formed on the surface of NiW film with cracks. The excellent anti-corrosion properties of free-crack NiW films are ascribed to homogeneous and compact surface (i.e. free-crack surface and fine grain). (C) 2014 Elsevier B.V. All rights reserved.
KeywordCorrosion Alloys Crack Thin Films
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.matchemphys.2014.07.041
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPLASMA ELECTROLYTIC OXIDATION ; ALUMINUM-ALLOY ; MICROARC OXIDATION ; ANODIC-OXIDATION ; COATINGS ; OXIDE ; AL ; PARAMETERS ; MECHANISMS ; GROWTH
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000342525100035
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11657
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Sci & Technol Being, State Key Lab Adv Met, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Wang, Mingyong,Wang, Zhi,Guo, Zhancheng. Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property[J]. MATERIALS CHEMISTRY AND PHYSICS,2014,148(1-2):245-292.
APA Wang, Mingyong,Wang, Zhi,&Guo, Zhancheng.(2014).Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property.MATERIALS CHEMISTRY AND PHYSICS,148(1-2),245-292.
MLA Wang, Mingyong,et al."Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property".MATERIALS CHEMISTRY AND PHYSICS 148.1-2(2014):245-292.
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