Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications
Autor(a) principal: | |
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Data de Publicação: | 2004 |
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=S1516-14392004000100025 |
Resumo: | The application of thermal spray coatings has been effective in preventing corrosion of steel and iron products. It has been used in a wide range of applications spreading from the petroleum to the food industry. In this work, the performance and effectiveness of a two-layered aluminum-based thermal spray coating applied to an ASTM A387 G11 steel was evaluated. The coating structure was comprised of an inner Al-Fe-Cr layer and an outer layer of aluminum. Coated samples were tested in the reactor zone of a fluid catalytic cracking unit (FCCU) of a petrochemical plant for 2.5 years. The reactor zone temperature was about 793 K (520 °C) and the environment was a mixed gas containing sulfur, oxygen and carbon. Laboratory-scale tests were also conducted on the coated samples in order to gain a better understanding of the corrosive effect of the gaseous species present in the FCCU atmosphere. Porosity present in the thermal spray coatings allowed the penetration of the atmosphere corrodents, which instigated intergranular corrosion of the steel substrate. The presence of an inner Al-Fe-Cr layer did not prevent coating spallation, which further contributed to the internal corrosion process. |
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Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applicationsaluminum coatingsthermal spray coatingshigh temperature corrosionmixed-gas environmentspetrochemical industryThe application of thermal spray coatings has been effective in preventing corrosion of steel and iron products. It has been used in a wide range of applications spreading from the petroleum to the food industry. In this work, the performance and effectiveness of a two-layered aluminum-based thermal spray coating applied to an ASTM A387 G11 steel was evaluated. The coating structure was comprised of an inner Al-Fe-Cr layer and an outer layer of aluminum. Coated samples were tested in the reactor zone of a fluid catalytic cracking unit (FCCU) of a petrochemical plant for 2.5 years. The reactor zone temperature was about 793 K (520 °C) and the environment was a mixed gas containing sulfur, oxygen and carbon. Laboratory-scale tests were also conducted on the coated samples in order to gain a better understanding of the corrosive effect of the gaseous species present in the FCCU atmosphere. Porosity present in the thermal spray coatings allowed the penetration of the atmosphere corrodents, which instigated intergranular corrosion of the steel substrate. The presence of an inner Al-Fe-Cr layer did not prevent coating spallation, which further contributed to the internal corrosion process.ABM, ABC, ABPol2004-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000100025Materials Research v.7 n.1 2004reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392004000100025info:eu-repo/semantics/openAccessRocha,Adriana da CunhaRizzo,FernandoZeng,ChaoliuPaes,Marcelo Pizaeng2004-05-25T00:00:00Zoai:scielo:S1516-14392004000100025Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2004-05-25T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
title |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
spellingShingle |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications Rocha,Adriana da Cunha aluminum coatings thermal spray coatings high temperature corrosion mixed-gas environments petrochemical industry |
title_short |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
title_full |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
title_fullStr |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
title_full_unstemmed |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
title_sort |
Duplex Al-based thermal spray coatings for corrosion protection in high temperature refinery applications |
author |
Rocha,Adriana da Cunha |
author_facet |
Rocha,Adriana da Cunha Rizzo,Fernando Zeng,Chaoliu Paes,Marcelo Piza |
author_role |
author |
author2 |
Rizzo,Fernando Zeng,Chaoliu Paes,Marcelo Piza |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Rocha,Adriana da Cunha Rizzo,Fernando Zeng,Chaoliu Paes,Marcelo Piza |
dc.subject.por.fl_str_mv |
aluminum coatings thermal spray coatings high temperature corrosion mixed-gas environments petrochemical industry |
topic |
aluminum coatings thermal spray coatings high temperature corrosion mixed-gas environments petrochemical industry |
description |
The application of thermal spray coatings has been effective in preventing corrosion of steel and iron products. It has been used in a wide range of applications spreading from the petroleum to the food industry. In this work, the performance and effectiveness of a two-layered aluminum-based thermal spray coating applied to an ASTM A387 G11 steel was evaluated. The coating structure was comprised of an inner Al-Fe-Cr layer and an outer layer of aluminum. Coated samples were tested in the reactor zone of a fluid catalytic cracking unit (FCCU) of a petrochemical plant for 2.5 years. The reactor zone temperature was about 793 K (520 °C) and the environment was a mixed gas containing sulfur, oxygen and carbon. Laboratory-scale tests were also conducted on the coated samples in order to gain a better understanding of the corrosive effect of the gaseous species present in the FCCU atmosphere. Porosity present in the thermal spray coatings allowed the penetration of the atmosphere corrodents, which instigated intergranular corrosion of the steel substrate. The presence of an inner Al-Fe-Cr layer did not prevent coating spallation, which further contributed to the internal corrosion process. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-03-01 |
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=S1516-14392004000100025 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000100025 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392004000100025 |
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.7 n.1 2004 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_ |
1754212657680875520 |