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Estimation of Oxidation Kinetics and Oxide Scale Void Position of Ferritic-Martensitic Steels in Supercritical Water
Joint Authors
Source
Advances in Materials Science and Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-08-30
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Exfoliation of oxide scales from high-temperature heating surfaces of power boilers threatened the safety of supercritical power generating units.
According to available space model, the oxidation kinetics of two ferritic-martensitic steels are developed to predict in supercritical water at 400°C, 500°C, and 600°C.
The iron diffusion coefficients in magnetite and Fe-Cr spinel are extrapolated from studies of Backhaus and Töpfer.
According to Fe-Cr-O ternary phase diagram, oxygen partial pressure at the steel/Fe-Cr spinel oxide interface is determined.
The oxygen partial pressure at the magnetite/supercritical water interface meets the equivalent oxygen partial pressure when system equilibrium has been attained.
The relative error between calculated values and experimental values is analyzed and the reasons of error are suggested.
The research results show that the results of simulation at 600°C are approximately close to experimental results.
The iron diffusion coefficient is discontinuous in the duplex scale of two ferritic-martensitic steels.
The simulation results of thicknesses of the oxide scale on tubes (T91) of final superheater of a 600 MW supercritical boiler are compared with field measurement data and calculation results by Adrian’s method.
The calculated void positions of oxide scales are in good agreement with a cross-sectional SEM image of the oxide layers.
American Psychological Association (APA)
Sun, Li& Yan, Weiping. 2017. Estimation of Oxidation Kinetics and Oxide Scale Void Position of Ferritic-Martensitic Steels in Supercritical Water. Advances in Materials Science and Engineering،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1125003
Modern Language Association (MLA)
Sun, Li& Yan, Weiping. Estimation of Oxidation Kinetics and Oxide Scale Void Position of Ferritic-Martensitic Steels in Supercritical Water. Advances in Materials Science and Engineering No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1125003
American Medical Association (AMA)
Sun, Li& Yan, Weiping. Estimation of Oxidation Kinetics and Oxide Scale Void Position of Ferritic-Martensitic Steels in Supercritical Water. Advances in Materials Science and Engineering. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1125003
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1125003