Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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=S1516-14392020000600208 |
Resumo: | Thermoelectric power plants that use mineral coal show high wear in heat exchanger due to the action of several damage mechanisms associated with the impact of hard particles from the residue of burnt coal, the ashes. The employment of coatings should be given into consideration particularly for critical components, which are subject to severe erosive conditions is one of the solutions. However, the choice of material will depend on several factors, including the properties of aggressive ashes. This paper aims to characterize ashes generated by a Brazilian coal-based power plant and a FeCrNbNi-based metallic coating obtained by the electric arc spraying process. No trace of sulfur content was found in fly ashes and it was defined that wear is mainly related to the impact and energy of hard particles are the leading causes of degradation in coal-fired boiler equipment. According to the assessment, applied coating showed (5 ± 2)% by volume of pores and cracks, with 1.6% of oxides after the spraying process and hardness 35% greater than ash particles. Preliminary results in field operation suggest that the material showed relatively low wear compared to the original substrate and showed great applicability in controlling material deterioration for this purpose. |
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Materials research (São Carlos. Online) |
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Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant BoilersThermoelectricfly ashthermal sprayingmetallic coatingThermoelectric power plants that use mineral coal show high wear in heat exchanger due to the action of several damage mechanisms associated with the impact of hard particles from the residue of burnt coal, the ashes. The employment of coatings should be given into consideration particularly for critical components, which are subject to severe erosive conditions is one of the solutions. However, the choice of material will depend on several factors, including the properties of aggressive ashes. This paper aims to characterize ashes generated by a Brazilian coal-based power plant and a FeCrNbNi-based metallic coating obtained by the electric arc spraying process. No trace of sulfur content was found in fly ashes and it was defined that wear is mainly related to the impact and energy of hard particles are the leading causes of degradation in coal-fired boiler equipment. According to the assessment, applied coating showed (5 ± 2)% by volume of pores and cracks, with 1.6% of oxides after the spraying process and hardness 35% greater than ash particles. Preliminary results in field operation suggest that the material showed relatively low wear compared to the original substrate and showed great applicability in controlling material deterioration for this purpose.ABM, ABC, ABPol2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000600208Materials Research v.23 n.6 2020reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/1980-5373-mr-2020-0257info:eu-repo/semantics/openAccessGomes,Diego de LimaCardoso,Bruno ReisFurtado,Heloisa CunhaDiniz,Marilia Garciaeng2020-11-24T00:00:00Zoai:scielo:S1516-14392020000600208Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2020-11-24T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
title |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
spellingShingle |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers Gomes,Diego de Lima Thermoelectric fly ash thermal spraying metallic coating |
title_short |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
title_full |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
title_fullStr |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
title_full_unstemmed |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
title_sort |
Characterization of Fly Ash and a Protective Coating for Brazilian Thermal Power Plant Boilers |
author |
Gomes,Diego de Lima |
author_facet |
Gomes,Diego de Lima Cardoso,Bruno Reis Furtado,Heloisa Cunha Diniz,Marilia Garcia |
author_role |
author |
author2 |
Cardoso,Bruno Reis Furtado,Heloisa Cunha Diniz,Marilia Garcia |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Gomes,Diego de Lima Cardoso,Bruno Reis Furtado,Heloisa Cunha Diniz,Marilia Garcia |
dc.subject.por.fl_str_mv |
Thermoelectric fly ash thermal spraying metallic coating |
topic |
Thermoelectric fly ash thermal spraying metallic coating |
description |
Thermoelectric power plants that use mineral coal show high wear in heat exchanger due to the action of several damage mechanisms associated with the impact of hard particles from the residue of burnt coal, the ashes. The employment of coatings should be given into consideration particularly for critical components, which are subject to severe erosive conditions is one of the solutions. However, the choice of material will depend on several factors, including the properties of aggressive ashes. This paper aims to characterize ashes generated by a Brazilian coal-based power plant and a FeCrNbNi-based metallic coating obtained by the electric arc spraying process. No trace of sulfur content was found in fly ashes and it was defined that wear is mainly related to the impact and energy of hard particles are the leading causes of degradation in coal-fired boiler equipment. According to the assessment, applied coating showed (5 ± 2)% by volume of pores and cracks, with 1.6% of oxides after the spraying process and hardness 35% greater than ash particles. Preliminary results in field operation suggest that the material showed relatively low wear compared to the original substrate and showed great applicability in controlling material deterioration for this purpose. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
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=S1516-14392020000600208 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392020000600208 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1980-5373-mr-2020-0257 |
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.23 n.6 2020 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_ |
1754212677938315264 |