Studies on corrosion resistance of Cu-40Ni alloy with different grain size in Cl- media

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	Studies on corrosion resistance of Cu-40Ni alloy with different grain size in Cl- media
	Cao, ZQ ; Liu, WH ; Niu, Y ; Wu, WT
刊名	RARE METAL MATERIALS AND ENGINEERING
	2005-09-01
卷号	34 页码:127-130
关键词	mechanical alloying nanocrystal line Cu-Ni alloy corrosion electrochemistry
ISSN号	1002-185X
通讯作者	Cao, ZQ(caozhongqiu6508@sina.com)
英文摘要	The corrosion mechanism and corrosion-resistance of Cu-40Ni alloy prepared by conventional casting (CA), mechanical alloy (MA) and hot-pressing processes with the great grain size difference in Cl- media were investigated by PARM273A and M5210 electrochemical apparatus through potentiodynamic polarization method and electrochemical impedance spectroscopy (EIS) technique. Results show that MA and CA Cu-40Ni alloy have similar corrosion law. The corrosion potential of Cu-40Ni alloy moves positively and corrosion rate increases with the increase of Cl- concentration in Na2SO4+NaCl media. Electrochemical impedance spectroscopy (EIS) is composed of double loops. Polarization resistance decreases and at the same time interface capacity increases with the increase of Cl(-)concentration. With the decreasing of grain size, capacitive loop becomes smaller. Because Cl- decreases oxidation-reduction potential by chemical reaction and replaces O-2- in Cu2O and breaks passive oxide films on the alloy surface at the same time, corrosion rate of alloys become higher. Corrosion rate of MA Cu-40Ni alloy is higher than that of CA Cu-40Ni alloy evidently in Na2SO4+NaCl medium.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000232210400032
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/84403]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cao, ZQ
作者单位	1.Shenyang Normal Univ, Expt Ctr, Shenyang 110034, Peoples R China 2.Met Res Inst, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Cao, ZQ,Liu, WH,Niu, Y,et al. Studies on corrosion resistance of Cu-40Ni alloy with different grain size in Cl- media[J]. RARE METAL MATERIALS AND ENGINEERING,2005,34:127-130.
APA	Cao, ZQ,Liu, WH,Niu, Y,&Wu, WT.(2005).Studies on corrosion resistance of Cu-40Ni alloy with different grain size in Cl- media.RARE METAL MATERIALS AND ENGINEERING,34,127-130.
MLA	Cao, ZQ,et al."Studies on corrosion resistance of Cu-40Ni alloy with different grain size in Cl- media".RARE METAL MATERIALS AND ENGINEERING 34(2005):127-130.