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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| Format: | Article |
| Language: | English |
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Trans Tech Publications Ltd., Switzerland
2012
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| Online Access: | http://irep.iium.edu.my/16691/ http://irep.iium.edu.my/16691/1/Formation_of_protective_Cr2O3_scale_at_high_temperature.pdf |
| _version_ | 1848777934952726528 |
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| author | Ani, Mohd Hanafi Othman, Raihan |
| author_facet | Ani, Mohd Hanafi Othman, Raihan |
| author_sort | Ani, Mohd Hanafi |
| building | IIUM Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-14T14:53:53Z |
| format | Article |
| id | iium-16691 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T14:53:53Z |
| publishDate | 2012 |
| publisher | Trans Tech Publications Ltd., Switzerland |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-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 PeerReviewed 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 |
| 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 |
| title | 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_short | 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 |
| topic | TN Mining engineering. Metallurgy |
| url | http://irep.iium.edu.my/16691/ http://irep.iium.edu.my/16691/ http://irep.iium.edu.my/16691/ http://irep.iium.edu.my/16691/1/Formation_of_protective_Cr2O3_scale_at_high_temperature.pdf |