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

IMR OpenIR

	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
通讯作者	Wang Jianqiu(wangjianqiu@imr.ac.cn)
	2011-07-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	47 期号:7 页码:809-815
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.
关键词	alloy 690 passive film potentiodynamic polarization electrochemical impedence spectroscopy (EIS) Mott-Scottky relation
资助者	National Basic Research Program of China ; National Natural Science Foundation of China
DOI	10.3724/SP.J.1037.2011.00212
收录类别	SCI
语种	英语
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
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000294980700008
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/107190
专题	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.