EFFECTS OF Cl- CONCENTRATION AND TEMPERATURE ON THE CORROSION BEHAVIOR OF ALLOY 690 IN BORATE BUFFER SOLUTION

doi:10.3724/SP.J.1037.2011.00212

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	EFFECTS OF Cl- CONCENTRATION AND TEMPERATURE ON THE CORROSION BEHAVIOR OF ALLOY 690 IN BORATE BUFFER SOLUTION
	Huang Fa; Wang Jianqiu; Han En-Hou; Ke Wei
刊名	ACTA METALLURGICA SINICA
	2011-07-11
卷号	47 期号:7 页码:809-815
关键词	alloy 690 passive film potentiodynamic polarization electrochemical impedence spectroscopy (EIS) Mott-Scottky relation
ISSN号	0412-1961
DOI	10.3724/SP.J.1037.2011.00212
通讯作者	Wang Jianqiu(wangjianqiu@imr.ac.cn)
英文摘要	The effects of Cl- concentration (0.5-2 mol/L) and temperature (25-80 degrees C) on the corrosion behavior of alloy 690 in borate buffer solution were investigated using potentiodynamic polarization (PD), electrochemical impedence spectroscopy (EIS) and semiconductor capacitance method (Mott-Scottky relation). Atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS) and potential-pH diagrams were employed to analyze the corrosion products. All of the polarization curves exhibited two passive regions and intergranular corrosion was observed on all samples. With the increase in both Cl- concentration and temperature, the corrosion potential decreased and the corrosion current density became larger. Furthermore, increasing the temperature also resulted in lower pitting potentials and narrower passive regions. After anodic polarization for 45 min, the film formed in the first passive region with lower potential was composed of Cr2O3, Fe2O3 and Ni(OH)(2), and behaved like a mixed-type semiconductor, while a thicker but less compact Ni2O3 film was formed in the second passive range with higher potential and behaved like a n-type semiconductor. The influences of Cl- and temperature on the corrosion behavior were discussed.
资助项目	National Basic Research Program of China[2011CB610502] ; National Natural Science Foundation of China[51025104]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000294980700008
资助机构	National Basic Research Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/107189]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang Jianqiu
作者单位	Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Huang Fa,Wang Jianqiu,Han En-Hou,et al. EFFECTS OF Cl- CONCENTRATION AND TEMPERATURE ON THE CORROSION BEHAVIOR OF ALLOY 690 IN BORATE BUFFER SOLUTION[J]. ACTA METALLURGICA SINICA,2011,47(7):809-815.
APA	Huang Fa,Wang Jianqiu,Han En-Hou,&Ke Wei.(2011).EFFECTS OF Cl- CONCENTRATION AND TEMPERATURE ON THE CORROSION BEHAVIOR OF ALLOY 690 IN BORATE BUFFER SOLUTION.ACTA METALLURGICA SINICA,47(7),809-815.
MLA	Huang Fa,et al."EFFECTS OF Cl- CONCENTRATION AND TEMPERATURE ON THE CORROSION BEHAVIOR OF ALLOY 690 IN BORATE BUFFER SOLUTION".ACTA METALLURGICA SINICA 47.7(2011):809-815.