Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | REM. Revista Escola de Minas (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672009000200009 |
Resumo: | A reasonable prediction of the service life of structures or equipment operating at high-temperatures in aggressive atmospheres requires a full understanding of the degradation mechanisms of the material due to mechanical loading and corrosion. The overall objective of this study is to simulate high-temperature corrosion processes under near-service conditions, which require both, a thermodynamic model to predict phase stabilities for given conditions and a mathematical description of the kinetic process, i.e., solid state diffusion. A computer program was developed in which the thermodynamic program library ChemApp is integrated into a numerical finite-difference diffusion calculation to treat internal oxidation, nitridation and sulfidization processes in various commercial alloys. The model is capable of simulating multi-phase internal corrosion processes controlled by solid-state diffusion into the bulk metal as well as intergranular corrosion occurring in low-alloy steels by fast inward oxygen transport along the grain boundaries of the substrate. In this article, dilute and monophase solutions are considered. |
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Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperaturesInternal nitridationoxidationcomputational thermodynamicsChemAppInCorrfinite differenceA reasonable prediction of the service life of structures or equipment operating at high-temperatures in aggressive atmospheres requires a full understanding of the degradation mechanisms of the material due to mechanical loading and corrosion. The overall objective of this study is to simulate high-temperature corrosion processes under near-service conditions, which require both, a thermodynamic model to predict phase stabilities for given conditions and a mathematical description of the kinetic process, i.e., solid state diffusion. A computer program was developed in which the thermodynamic program library ChemApp is integrated into a numerical finite-difference diffusion calculation to treat internal oxidation, nitridation and sulfidization processes in various commercial alloys. The model is capable of simulating multi-phase internal corrosion processes controlled by solid-state diffusion into the bulk metal as well as intergranular corrosion occurring in low-alloy steels by fast inward oxygen transport along the grain boundaries of the substrate. In this article, dilute and monophase solutions are considered.Escola de Minas2009-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672009000200009Rem: Revista Escola de Minas v.62 n.2 2009reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/S0370-44672009000200009info:eu-repo/semantics/openAccessTrindade,Vicente BrazChrist,Hans-JürgenKrupp,Ulricheng2009-07-03T00:00:00Zoai:scielo:S0370-44672009000200009Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2009-07-03T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse |
dc.title.none.fl_str_mv |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
title |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
spellingShingle |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures Trindade,Vicente Braz Internal nitridation oxidation computational thermodynamics ChemApp InCorr finite difference |
title_short |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
title_full |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
title_fullStr |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
title_full_unstemmed |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
title_sort |
Computer-based simulation of kinetics of internal corrosion of engineering alloys at high-temperatures |
author |
Trindade,Vicente Braz |
author_facet |
Trindade,Vicente Braz Christ,Hans-Jürgen Krupp,Ulrich |
author_role |
author |
author2 |
Christ,Hans-Jürgen Krupp,Ulrich |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Trindade,Vicente Braz Christ,Hans-Jürgen Krupp,Ulrich |
dc.subject.por.fl_str_mv |
Internal nitridation oxidation computational thermodynamics ChemApp InCorr finite difference |
topic |
Internal nitridation oxidation computational thermodynamics ChemApp InCorr finite difference |
description |
A reasonable prediction of the service life of structures or equipment operating at high-temperatures in aggressive atmospheres requires a full understanding of the degradation mechanisms of the material due to mechanical loading and corrosion. The overall objective of this study is to simulate high-temperature corrosion processes under near-service conditions, which require both, a thermodynamic model to predict phase stabilities for given conditions and a mathematical description of the kinetic process, i.e., solid state diffusion. A computer program was developed in which the thermodynamic program library ChemApp is integrated into a numerical finite-difference diffusion calculation to treat internal oxidation, nitridation and sulfidization processes in various commercial alloys. The model is capable of simulating multi-phase internal corrosion processes controlled by solid-state diffusion into the bulk metal as well as intergranular corrosion occurring in low-alloy steels by fast inward oxygen transport along the grain boundaries of the substrate. In this article, dilute and monophase solutions are considered. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-06-01 |
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=S0370-44672009000200009 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672009000200009 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0370-44672009000200009 |
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 |
Escola de Minas |
publisher.none.fl_str_mv |
Escola de Minas |
dc.source.none.fl_str_mv |
Rem: Revista Escola de Minas v.62 n.2 2009 reponame:REM. Revista Escola de Minas (Online) instname:Escola de Minas instacron:ESCOLA DE MINAS |
instname_str |
Escola de Minas |
instacron_str |
ESCOLA DE MINAS |
institution |
ESCOLA DE MINAS |
reponame_str |
REM. Revista Escola de Minas (Online) |
collection |
REM. Revista Escola de Minas (Online) |
repository.name.fl_str_mv |
REM. Revista Escola de Minas (Online) - Escola de Minas |
repository.mail.fl_str_mv |
editor@rem.com.br |
_version_ |
1754122197477097472 |