Galvanic corrosion in molten salts: A discussion of the corrosion mechanism of two-phase Ni-20Cr-20/30Cu alloys in eutectic (Li,K)(2)CO3 at 650 degrees C

doi:10.1007/s11085-005-6559-3

IMR OpenIR

	Galvanic corrosion in molten salts: A discussion of the corrosion mechanism of two-phase Ni-20Cr-20/30Cu alloys in eutectic (Li,K)(2)CO3 at 650 degrees C
	Zeng, CL; Li, J; Zhou, T
通讯作者	Zeng, CL(clzeng@imr.ac.cn)
	2005-10-01
发表期刊	OXIDATION OF METALS
ISSN	0030-770X
卷号	64 期号:3-4 页码:207-218
摘要	The corrosion of a Ni-20Cr and three ternary Ni-20Cr-Cu alloys containing 10, 20 and 30 wt.% Cu, respectively, in a eutectic (Li, K)(2)CO3 melt was studied at 650 degrees C under air. Ni-20Cr and Ni-20Cr-10Cu are solid-solution alloys, while both Ni-20Cr-20Cu and Ni-20Cr-30Cu are two-phase alloys composed of a Cu-depleted matrix together with a small amount of a Cu-rich phase. The results indicate that Ni-20Cr and Ni-20Cr-10Cu have similar corrosion rates, forming a scale of external NiO and inner Cr-rich oxides. The two-phase Ni-20Cr-20/30 Cu alloys corrode rapidly, producing a mixture of Ni-Cr-rich oxides and a Ni-Cu metallic phase, which may be ascribed to the accelerated corrosion of the Cu-depleted matrix coupled with the cathodic Cu-rich phase of the alloys. As compared to Ni-20Cr-30Cu, Ni-20Cr-20Cu suffers from more-severe corrosion, due to a smaller area fraction of the cathodic Cu-rich phase in the alloy. The galvanic corrosion mechanism is also discussed.
关键词	ternary Ni-Cr-Cu alloys molten (Li, K)(2)CO3 galvanic corrosion two-phase structure
DOI	10.1007/s11085-005-6559-3
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000231630300003
出版者	SPRINGER/PLENUM PUBLISHERS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/82022
通讯作者	Zeng, CL
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	Zeng, CL,Li, J,Zhou, T. Galvanic corrosion in molten salts: A discussion of the corrosion mechanism of two-phase Ni-20Cr-20/30Cu alloys in eutectic (Li,K)(2)CO3 at 650 degrees C[J]. OXIDATION OF METALS,2005,64(3-4):207-218.
APA	Zeng, CL,Li, J,&Zhou, T.(2005).Galvanic corrosion in molten salts: A discussion of the corrosion mechanism of two-phase Ni-20Cr-20/30Cu alloys in eutectic (Li,K)(2)CO3 at 650 degrees C.OXIDATION OF METALS,64(3-4),207-218.
MLA	Zeng, CL,et al."Galvanic corrosion in molten salts: A discussion of the corrosion mechanism of two-phase Ni-20Cr-20/30Cu alloys in eutectic (Li,K)(2)CO3 at 650 degrees C".OXIDATION OF METALS 64.3-4(2005):207-218.