Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k

Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k

Fe-Cr alloy is commonly being used as boiler tube’s material. It is subjected to prolonged exposure to water vapor oxidation. The ability to withstand high temperature corrosion can normally be attributed to the formation of a dense and slow growing Cr-richoxide scale known as chromia, Cr2O3 scal...

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Main Authors: Arifin, S. K., Abdul Hamid, Abd. Malek, Berahim, Ahmad Nukhaie, Ani, Mohd Hanafi
Format: Conference or Workshop Item
Language:English
English
English
Published: American Scientific Publishers 2017
Subjects:
TA401 Materials of engineering and construction
Online Access:http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/1/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale.pdf
http://irep.iium.edu.my/62459/6/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_SCOPUS.pdf
http://irep.iium.edu.my/62459/13/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_WoS.pdf
id iium-62459
recordtype eprints
spelling iium-624592019-06-24T08:14:54Z http://irep.iium.edu.my/62459/ Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k Arifin, S. K. Abdul Hamid, Abd. Malek Berahim, Ahmad Nukhaie Ani, Mohd Hanafi TA401 Materials of engineering and construction Fe-Cr alloy is commonly being used as boiler tube’s material. It is subjected to prolonged exposure to water vapor oxidation. The ability to withstand high temperature corrosion can normally be attributed to the formation of a dense and slow growing Cr-richoxide scale known as chromia, Cr2O3 scale. However, oxidation may limit the alloy’s service lifetime due to decreasing of its protectiveness capability. This paper is to presents an experimental study of thermo gravimetric and Fourier transform infrared analysis of Cr2O3 at 1073 K in dry and humid environment. Samples were used from commercially available Cr2O3 powder. It was cold-pressed into pellet shape of 12 mm diameter and 3 mm thick with hydraulic press for 40 min at 48 MPa. It then sintered at 1173 K in inert gas environment for 8 h. The samples are cooled and placed in 5 mm diameter platinum pan. It is subjected to reaction in dry and wet environment at 1073 K by applying 100%-Ar and Ar-5%H2 gas. Each reaction period is 48 h utilizing Thermo Gravimetric Analyzer, TGA to quantify the mass changes. After the reaction, the samples then characterized with Fourier Transform Infrared Spectroscopy, FT-IR and Field Emission Electron Scanning Microscopy, FE-SEM. The TGA result shows mass decreasing ratio of Cr2O3 in wet (PH2O =9.5x105Pa) and dry environment is at a factor of 1.2 while parabolic rate at 1.4. FT-IR results confirmed that water vapor significantly broaden the peaks, thus promotes the volatilization of Cr2O3 in wet sample. FESEM shows mostly packed and intact in dry while in wet sample, slightly porous particle arrangement compare to dry. It is concluded that water vapor species decreased Cr2O3 protectiveness capability. American Scientific Publishers 2017-12 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/62459/1/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale.pdf application/pdf en http://irep.iium.edu.my/62459/6/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_SCOPUS.pdf application/pdf en http://irep.iium.edu.my/62459/13/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_WoS.pdf Arifin, S. K. and Abdul Hamid, Abd. Malek and Berahim, Ahmad Nukhaie and Ani, Mohd Hanafi (2017) Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k. In: International Conference on Advances in Manufacturing and Materials Engineering 2017 (ICAMME17), 8th-9th August 2017, Kuala Lumpur, Malaysia. http://iopscience.iop.org/article/10.1088/1757-899X/290/1/012085/meta 10.1088/1757-899X/290/1/012085
repository_type Digital Repository
institution_category Local University
institution International Islamic University Malaysia
building IIUM Repository
collection Online Access
language English
English
English
topic TA401 Materials of engineering and construction
spellingShingle TA401 Materials of engineering and construction
Arifin, S. K.
Abdul Hamid, Abd. Malek
Berahim, Ahmad Nukhaie
Ani, Mohd Hanafi
Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
description Fe-Cr alloy is commonly being used as boiler tube’s material. It is subjected to prolonged exposure to water vapor oxidation. The ability to withstand high temperature corrosion can normally be attributed to the formation of a dense and slow growing Cr-richoxide scale known as chromia, Cr2O3 scale. However, oxidation may limit the alloy’s service lifetime due to decreasing of its protectiveness capability. This paper is to presents an experimental study of thermo gravimetric and Fourier transform infrared analysis of Cr2O3 at 1073 K in dry and humid environment. Samples were used from commercially available Cr2O3 powder. It was cold-pressed into pellet shape of 12 mm diameter and 3 mm thick with hydraulic press for 40 min at 48 MPa. It then sintered at 1173 K in inert gas environment for 8 h. The samples are cooled and placed in 5 mm diameter platinum pan. It is subjected to reaction in dry and wet environment at 1073 K by applying 100%-Ar and Ar-5%H2 gas. Each reaction period is 48 h utilizing Thermo Gravimetric Analyzer, TGA to quantify the mass changes. After the reaction, the samples then characterized with Fourier Transform Infrared Spectroscopy, FT-IR and Field Emission Electron Scanning Microscopy, FE-SEM. The TGA result shows mass decreasing ratio of Cr2O3 in wet (PH2O =9.5x105Pa) and dry environment is at a factor of 1.2 while parabolic rate at 1.4. FT-IR results confirmed that water vapor significantly broaden the peaks, thus promotes the volatilization of Cr2O3 in wet sample. FESEM shows mostly packed and intact in dry while in wet sample, slightly porous particle arrangement compare to dry. It is concluded that water vapor species decreased Cr2O3 protectiveness capability.
format Conference or Workshop Item
author Arifin, S. K.
Abdul Hamid, Abd. Malek
Berahim, Ahmad Nukhaie
Ani, Mohd Hanafi
author_facet Arifin, S. K.
Abdul Hamid, Abd. Malek
Berahim, Ahmad Nukhaie
Ani, Mohd Hanafi
author_sort Arifin, S. K.
title Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
title_short Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
title_full Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
title_fullStr Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
title_full_unstemmed Effects of water vapor on protectiveness of Cr2O3 scale at 1073 k
title_sort effects of water vapor on protectiveness of cr2o3 scale at 1073 k
publisher American Scientific Publishers
publishDate 2017
url http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/
http://irep.iium.edu.my/62459/1/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale.pdf
http://irep.iium.edu.my/62459/6/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_SCOPUS.pdf
http://irep.iium.edu.my/62459/13/62459_Effects%20of%20water%20vapor%20on%20protectiveness%20of%20Cr2O3%20scale_WoS.pdf
first_indexed 2023-09-18T21:28:30Z
last_indexed 2023-09-18T21:28:30Z
_version_ 1777412353258684416

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