Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property

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	Electrodeposited free-crack NiW films under super gravity filed: Structure and excellent corrosion property
	Wang, Mingyong 1; Wang, Zhi 1; Guo, Zhancheng 1,2
刊名	MATERIALS CHEMISTRY AND PHYSICS
	2014-11-14
卷号	148 期号:1-2 页码:245-292
关键词	Corrosion Alloys Crack Thin films
ISSN号	0254-0584
其他题名	Mater. Chem. Phys.
中文摘要	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.
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	PLASMA ELECTROLYTIC OXIDATION ; ALUMINUM-ALLOY ; MICROARC OXIDATION ; ANODIC-OXIDATION ; COATINGS ; OXIDE ; AL ; PARAMETERS ; MECHANISMS ; GROWTH
收录类别	SCI
原文出处	://WOS:000342525100035
语种	英语
WOS记录号	WOS:000342525100035
公开日期	2014-11-02
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11657]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.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
推荐引用方式 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.