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

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	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
	C. L. Zeng; J. Li; T. Zhou
	2005
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.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;zeng, cl (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;clzeng@imr.ac.cn
关键词	Ternary Ni-cr-cu Alloys Molten (Li k)(2)Co3 Galvanic Corrosion Two-phase Structure Ni-ti Alloys Oxygen Carbonate Reduction Behavior Mixture Li2co3-k2co3 Oxidation Steel
URL	查看原文
WOS记录号	WOS:000231630300003
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35192
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. L. Zeng,J. Li,T. Zhou. 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	C. L. Zeng,J. Li,&T. Zhou.(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	C. L. Zeng,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.