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Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor

The formation of protective Cr2O3 scale at high temperature was evaluated using Wagner’s theory of binary alloy oxidation. The results show that at 1073 K, around 9.8 wt% of Cr is required to form external Cr2O3 scale, and 3.5wt% of Cr is needed to maintain the scale. Introduction of water vapor has...

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Main Authors: Ani, Mohd Hanafi, Othman, Raihan
Format: Article
Language:English
Published: Trans Tech Publications Ltd., Switzerland 2012
Subjects:
TN Mining engineering. Metallurgy
Online Access:http://irep.iium.edu.my/16691/1/Formation_of_protective_Cr2O3_scale_at_high_temperature.pdf
http://irep.iium.edu.my/16691/
http://www.scientific.net/AMR.402.412
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spelling my.iium.irep.166912012-06-08T02:07:34Z http://irep.iium.edu.my/16691/ Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor Ani, Mohd Hanafi Othman, Raihan TN Mining engineering. Metallurgy The formation of protective Cr2O3 scale at high temperature was evaluated using Wagner’s theory of binary alloy oxidation. The results show that at 1073 K, around 9.8 wt% of Cr is required to form external Cr2O3 scale, and 3.5wt% of Cr is needed to maintain the scale. Introduction of water vapor has shifted the critical Cr concentration to higher value. The effects of water vapor in increasing Cr critical concentration to form external Cr2O3 scale was disscussed from view of oxygen permeablility and Cr diffusivity in the alloy. It is concluded that Cr diffusivity has negligible effect, while oxygen permeability increase with the presence of water vapor, thus increase the oxidation rate. Trans Tech Publications Ltd., Switzerland 2012 Article REM application/pdf en http://irep.iium.edu.my/16691/1/Formation_of_protective_Cr2O3_scale_at_high_temperature.pdf Ani, Mohd Hanafi and Othman, Raihan (2012) Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor. Advanced Materials Research, 402. pp. 412-420. ISSN 1662-8985 http://www.scientific.net/AMR.402.412 10.4028/www.scientific.net/AMR.402.412
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic TN Mining engineering. Metallurgy
spellingShingle TN Mining engineering. Metallurgy
Ani, Mohd Hanafi
Othman, Raihan
Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
description The formation of protective Cr2O3 scale at high temperature was evaluated using Wagner’s theory of binary alloy oxidation. The results show that at 1073 K, around 9.8 wt% of Cr is required to form external Cr2O3 scale, and 3.5wt% of Cr is needed to maintain the scale. Introduction of water vapor has shifted the critical Cr concentration to higher value. The effects of water vapor in increasing Cr critical concentration to form external Cr2O3 scale was disscussed from view of oxygen permeablility and Cr diffusivity in the alloy. It is concluded that Cr diffusivity has negligible effect, while oxygen permeability increase with the presence of water vapor, thus increase the oxidation rate.
format Article
author Ani, Mohd Hanafi
Othman, Raihan
author_facet Ani, Mohd Hanafi
Othman, Raihan
author_sort Ani, Mohd Hanafi
title Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
title_short Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
title_full Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
title_fullStr Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
title_full_unstemmed Formation of protective Cr2O3 scale at high temperature and the effect of mass transport in the presence of water vapor
title_sort formation of protective cr2o3 scale at high temperature and the effect of mass transport in the presence of water vapor
publisher Trans Tech Publications Ltd., Switzerland
publishDate 2012
url http://irep.iium.edu.my/16691/1/Formation_of_protective_Cr2O3_scale_at_high_temperature.pdf
http://irep.iium.edu.my/16691/
http://www.scientific.net/AMR.402.412
_version_ 1643607158869196800
score 13.211869

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