The effects of temperature and oxygen pressure on the initial oxidation of stainless steel 441

被引:17
作者
Chen, Zhiyuan [1 ,2 ]
Wang, Lijun [1 ,2 ]
Li, Fushen [3 ]
Chou, Kuo Chih [1 ,2 ]
Sun, Zaihong [4 ]
机构
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[4] Suzhou HuaTsing Power Sci Tech Co Ltd, Kunshan 215313, Peoples R China
基金
中国国家自然科学基金;
关键词
SOFC; Interconnect; Stainless steel; Oxidation; FE-16CR ALLOY; SCALE GROWTH; OXIDE; KINETICS; BEHAVIOR; SOFC; INTERCONNECT; FE; ATMOSPHERE; DIFFUSION;
D O I
10.1016/j.ijhydene.2014.04.188
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The oxidation behavior of the stainless steel 441 in the initial 2 h was investigated gravimetrically at 600 degrees C-950 degrees C under various oxygen pressures. The morphology, composition and the growth stress of the scale on the oxidized alloy were analyzed by SEM/EDS and Raman spectra. It was found that the performances of the scale degraded with the temperature and oxygen pressure increasing. The oxidation of stainless steel 441 presented a multi-stages behavior. It was suggested that the first chemical reaction determining stage was the nonselective oxidation of steel surface. The following stage in pure oxygen ambient was the formation of chromium-oxide-mainly-containing layer. Kinetic mechanism of second stage oxidation changed from diffusion determining step (600-800 degrees C) to interface chemical reaction (900-950 degrees C) due to the decline of the protection of the oxides layer. Only linear rate law was obeyed in the lower oxygen pressure atmospheres at 800 and 900 degrees C within the initial 2 h. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:10303 / 10312
页数:10
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