| 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 | |
| Source Publication | Corrosion Science
 |
| ISSN | 0010-938X |
| Volume | 39Issue:10-11Pages:1811-1829 |
| Abstract | 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. |
| description.department | 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 |
| Keyword | 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 |
| URL | 查看原文 |
| WOS ID | WOS:000071426300005 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/38056 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation 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. |
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