Evolution of surface chemistry and morphology of oxide scale formed during initial stage oxidation of modified 9Cr-1Mo steel

被引：52
作者：
Swaminathan, Srinivasan [1 ]
Mallika, C. [1 ]
Krishna, Nanda Gopala [1 ]
Thinaharan, C. [1 ]
Jayakumar, T. [1 ]
Mudali, U. Kamachi [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India
来源：
CORROSION SCIENCE | 2014年 / 79卷
关键词：
Alloy; Steel; XPS; SEM; Segregation; Oxidation; FERRITIC-MARTENSITIC STEELS; CYCLE FATIGUE BEHAVIOR; SELECTIVE OXIDATION; CORROSION BEHAVIOR; WATER-VAPOR; TEMPERATURE; CREEP; T91; CR; RESISTANCE;
D O I：
10.1016/j.corsci.2013.10.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Initial stage oxidation characteristics of the modified 9Cr-1Mo steel in ambient air at 650 degrees C have been investigated, for exposure times ranging from 5 to 500 h. Oxygen flux from the gas phase causes high initial oxidation rate, but the growth kinetics do not follow parabolic law. In "as-received" condition, binary oxides of Fe and Cr were found as native oxides. Upon oxidation, segregation of Mn resulted in the formation of MnCr2O4 along with FeCr2O4 and binary oxides of Fe, Cr and Mn. Thus, the initial oxide scale constitutes multiple oxides with delineated interface, unlikely to have a layered structure. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：59 / 68
页数：10
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