The sulfidation of two Fe-Ce alloys in H-2-H2S mixtures at 600-800 degrees C

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	The sulfidation of two Fe-Ce alloys in H-2-H2S mixtures at 600-800 degrees C
	Y. Niu; G. Y. Fu; P. Castello; F. Gesmundo; W. T. Wu; F. Viani
	1997
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	39 期号:10-11 页码:1811-1829
摘要	The sulfidation behavior of two Fe-Ce alloys containing approximately 15 and 30 wt% cerium has been studied at 600-800 degrees C in H-2-H2S mixtures providing a sulfur pressure of 10(-8) atm. The alloys corrode more slowly than pure iron, but more rapidly than pure cerium. The sulfidation rates generally decrease with time and tend to become parabolic after an initial stage intermediate between linear and parabolic, except for Fe-15Ce which corrodes linearly after an initial quasi-parabolic behavior. Both alloys produce complex scales, containing an outermost layer of practically pure iron sulfide and an inner complex layer where the sulfides of both alloy components are simultaneously present. Finally, a thin region of internal sulfidation of cerium is also generally present in contact with the alloy which is not depleted in cerium. Cerium is not able to diffuse out of the alloy consumption region, where it forms a cerium sulfide mixed with iron sulfide. The iron sulfide forms a continuous network which allows the growth of the external FeS layer, even though at rates reduced with respect to pure iron. Thus, a cerium/content up to 30 wt% is not sufficient to prevent the sulfidation of pure iron. These results as well as the details of the microstructure of the scales grown on the two alloys are interpreted by taking into account the limited solubility of cerium in the base metal and the presence of intermetallic compounds in the alloys. (C) 1997 Elsevier Science Ltd.
部门归属	univ genoa, ist chim, i-16129 genoa, italy. chinese acad sci, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china. shenyang inst chem engn, shenyang 110021, peoples r china.;niu, y (reprint author), univ genoa, ist chim, fiera mare,pad d, i-16129 genoa, italy
关键词	Iron Cerium Sulfidation High Temperatures 2-phase Binary-alloys High-temperature Sulfidation Possible Scaling Modes Low Oxidant Pressures Nb Alloys H2-h2s Mixtures Mo Alloys Oxidation 600-degrees-c-800-degrees-c Corrosion
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WOS记录号	WOS:000071426300005
引用统计	被引频次：3[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/321006/38056
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Niu,G. Y. Fu,P. Castello,et al. The sulfidation of two Fe-Ce alloys in H-2-H2S mixtures at 600-800 degrees C[J]. Corrosion Science,1997,39(10-11):1811-1829.
APA	Y. Niu,G. Y. Fu,P. Castello,F. Gesmundo,W. T. Wu,&F. Viani.(1997).The sulfidation of two Fe-Ce alloys in H-2-H2S mixtures at 600-800 degrees C.Corrosion Science,39(10-11),1811-1829.
MLA	Y. Niu,et al."The sulfidation of two Fe-Ce alloys in H-2-H2S mixtures at 600-800 degrees C".Corrosion Science 39.10-11(1997):1811-1829.