High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000400002 |
Resumo: | The global pressure for recycling and ecological energy production increases steadily in combination with the demand of cost-effective application of materials. However, some severe corrosion problems, associated with the high internal/intergranular corrosion rates in boiler components need to be avoid. Some commercial boiler materials contain a Cr content of 0.55 (wt. (%)) - 2.25 (wt. (%)). This Cr concentration in the alloys is not sufficient for the formation of a complete dense Cr2O3 scale. Hence, high oxidation kinetics may result. In this study, pure Fe and the steel 2.25Cr1Mo were oxidized in laboratory air at 550 °C using a thermobalance system. The surface as well as the cross section of oxidized specimens were analysed using scanning electron microscopy in order to quantify several factors (e.g. surface finishing, cold working and grain size) on the overall oxidation kinetics. For alloys with low Cr content, a decreasing in the grain size leads to an acceleration of the oxidation rate by facilitating the oxygen diffusion along alloy grain boundaries leading to an inward oxide layer formation. The study of effects of surface finish and cold working yielded results revealing that the oxidation process is complex and comparison of results from different laboratories is difficult and should be done. |
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High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Molow-alloy steelseffect of cold workeffect of grain sizehigh-temperature oxidationThe global pressure for recycling and ecological energy production increases steadily in combination with the demand of cost-effective application of materials. However, some severe corrosion problems, associated with the high internal/intergranular corrosion rates in boiler components need to be avoid. Some commercial boiler materials contain a Cr content of 0.55 (wt. (%)) - 2.25 (wt. (%)). This Cr concentration in the alloys is not sufficient for the formation of a complete dense Cr2O3 scale. Hence, high oxidation kinetics may result. In this study, pure Fe and the steel 2.25Cr1Mo were oxidized in laboratory air at 550 °C using a thermobalance system. The surface as well as the cross section of oxidized specimens were analysed using scanning electron microscopy in order to quantify several factors (e.g. surface finishing, cold working and grain size) on the overall oxidation kinetics. For alloys with low Cr content, a decreasing in the grain size leads to an acceleration of the oxidation rate by facilitating the oxygen diffusion along alloy grain boundaries leading to an inward oxide layer formation. The study of effects of surface finish and cold working yielded results revealing that the oxidation process is complex and comparison of results from different laboratories is difficult and should be done.ABM, ABC, ABPol2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000400002Materials Research v.8 n.4 2005reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392005000400002info:eu-repo/semantics/openAccessTrindade,Vicente BrazBorin,RodrigoHanjari,Behzad ZandiYang,SonglanKrupp,UlrichChrist,Hans-Jürgeneng2006-01-31T00:00:00Zoai:scielo:S1516-14392005000400002Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-01-31T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
title |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
spellingShingle |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo Trindade,Vicente Braz low-alloy steels effect of cold work effect of grain size high-temperature oxidation |
title_short |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
title_full |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
title_fullStr |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
title_full_unstemmed |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
title_sort |
High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo |
author |
Trindade,Vicente Braz |
author_facet |
Trindade,Vicente Braz Borin,Rodrigo Hanjari,Behzad Zandi Yang,Songlan Krupp,Ulrich Christ,Hans-Jürgen |
author_role |
author |
author2 |
Borin,Rodrigo Hanjari,Behzad Zandi Yang,Songlan Krupp,Ulrich Christ,Hans-Jürgen |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Trindade,Vicente Braz Borin,Rodrigo Hanjari,Behzad Zandi Yang,Songlan Krupp,Ulrich Christ,Hans-Jürgen |
dc.subject.por.fl_str_mv |
low-alloy steels effect of cold work effect of grain size high-temperature oxidation |
topic |
low-alloy steels effect of cold work effect of grain size high-temperature oxidation |
description |
The global pressure for recycling and ecological energy production increases steadily in combination with the demand of cost-effective application of materials. However, some severe corrosion problems, associated with the high internal/intergranular corrosion rates in boiler components need to be avoid. Some commercial boiler materials contain a Cr content of 0.55 (wt. (%)) - 2.25 (wt. (%)). This Cr concentration in the alloys is not sufficient for the formation of a complete dense Cr2O3 scale. Hence, high oxidation kinetics may result. In this study, pure Fe and the steel 2.25Cr1Mo were oxidized in laboratory air at 550 °C using a thermobalance system. The surface as well as the cross section of oxidized specimens were analysed using scanning electron microscopy in order to quantify several factors (e.g. surface finishing, cold working and grain size) on the overall oxidation kinetics. For alloys with low Cr content, a decreasing in the grain size leads to an acceleration of the oxidation rate by facilitating the oxygen diffusion along alloy grain boundaries leading to an inward oxide layer formation. The study of effects of surface finish and cold working yielded results revealing that the oxidation process is complex and comparison of results from different laboratories is difficult and should be done. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000400002 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392005000400002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392005000400002 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.8 n.4 2005 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212658122326016 |