Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
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=S1516-14392013000600014 |
Resumo: | Chromate coatings used as corrosion protection technologies for aluminum alloys are environmentally harmful and extremely toxic. This paper presents an investigation on the deposition of environmentally friendly cerium oxide-based anticorrosive coatings on aluminum alloy 2024 substrates by the sol - gel method. The influence of the calcination temperature on both the microstructural characteristics and the electrochemical corrosion performance was tested using scanning electron microscopy, X-ray diffraction, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), before and after, periods of immersion in saline corrosive solutions. The ceramic coatings synthesized at 200, 300 and 400 °C showed very resistive behaviors leading to both an efficient passivation of the alloy surfaces and good corrosion protection. This passivation was maintained for 30 days of immersion in saline solutions, as well as, when aggressive electrochemical polarization experiments (until 2.0 V versus saturated calomel electrode) were used. Very high resistances for the charge transfer (0.14-0.28 GΩ) and very low current density values (5 × 10- 14 -5 × 10- 11 A cm- 2) were estimated by EIS and potentiodynamic polarization, respectively, for coatings prepared at 200-400 °C. Thus, the coatings prepared in this study by the sol - gel method appear as an efficient treatment for the corrosion protection of aluminum alloys. |
id |
ABMABCABPOL-1_e6745c175ac5ef59df37a3c58a05d526 |
---|---|
oai_identifier_str |
oai:scielo:S1516-14392013000600014 |
network_acronym_str |
ABMABCABPOL-1 |
network_name_str |
Materials research (São Carlos. Online) |
repository_id_str |
|
spelling |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024Solgel growthcerium oxidescorrosion protectionAA2024-T3electrochemical impedance spectroscopyChromate coatings used as corrosion protection technologies for aluminum alloys are environmentally harmful and extremely toxic. This paper presents an investigation on the deposition of environmentally friendly cerium oxide-based anticorrosive coatings on aluminum alloy 2024 substrates by the sol - gel method. The influence of the calcination temperature on both the microstructural characteristics and the electrochemical corrosion performance was tested using scanning electron microscopy, X-ray diffraction, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), before and after, periods of immersion in saline corrosive solutions. The ceramic coatings synthesized at 200, 300 and 400 °C showed very resistive behaviors leading to both an efficient passivation of the alloy surfaces and good corrosion protection. This passivation was maintained for 30 days of immersion in saline solutions, as well as, when aggressive electrochemical polarization experiments (until 2.0 V versus saturated calomel electrode) were used. Very high resistances for the charge transfer (0.14-0.28 GΩ) and very low current density values (5 × 10- 14 -5 × 10- 11 A cm- 2) were estimated by EIS and potentiodynamic polarization, respectively, for coatings prepared at 200-400 °C. Thus, the coatings prepared in this study by the sol - gel method appear as an efficient treatment for the corrosion protection of aluminum alloys.ABM, ABC, ABPol2013-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600014Materials Research v.16 n.6 2013reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000115info:eu-repo/semantics/openAccessSalazar-Banda,Giancarlo RichardEguiluz,Katlin Ivon BarriosMotheo,Artur JesusMachado,Sergio Antonio Spinolaeng2013-12-13T00:00:00Zoai:scielo:S1516-14392013000600014Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2013-12-13T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
title |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
spellingShingle |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 Salazar-Banda,Giancarlo Richard Sol gel growth cerium oxides corrosion protection AA2024-T3 electrochemical impedance spectroscopy |
title_short |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
title_full |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
title_fullStr |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
title_full_unstemmed |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
title_sort |
Environmentally friendly sol - gel-based anticorrosive coatings on aluminum alloy 2024 |
author |
Salazar-Banda,Giancarlo Richard |
author_facet |
Salazar-Banda,Giancarlo Richard Eguiluz,Katlin Ivon Barrios Motheo,Artur Jesus Machado,Sergio Antonio Spinola |
author_role |
author |
author2 |
Eguiluz,Katlin Ivon Barrios Motheo,Artur Jesus Machado,Sergio Antonio Spinola |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Salazar-Banda,Giancarlo Richard Eguiluz,Katlin Ivon Barrios Motheo,Artur Jesus Machado,Sergio Antonio Spinola |
dc.subject.por.fl_str_mv |
Sol gel growth cerium oxides corrosion protection AA2024-T3 electrochemical impedance spectroscopy |
topic |
Sol gel growth cerium oxides corrosion protection AA2024-T3 electrochemical impedance spectroscopy |
description |
Chromate coatings used as corrosion protection technologies for aluminum alloys are environmentally harmful and extremely toxic. This paper presents an investigation on the deposition of environmentally friendly cerium oxide-based anticorrosive coatings on aluminum alloy 2024 substrates by the sol - gel method. The influence of the calcination temperature on both the microstructural characteristics and the electrochemical corrosion performance was tested using scanning electron microscopy, X-ray diffraction, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), before and after, periods of immersion in saline corrosive solutions. The ceramic coatings synthesized at 200, 300 and 400 °C showed very resistive behaviors leading to both an efficient passivation of the alloy surfaces and good corrosion protection. This passivation was maintained for 30 days of immersion in saline solutions, as well as, when aggressive electrochemical polarization experiments (until 2.0 V versus saturated calomel electrode) were used. Very high resistances for the charge transfer (0.14-0.28 GΩ) and very low current density values (5 × 10- 14 -5 × 10- 11 A cm- 2) were estimated by EIS and potentiodynamic polarization, respectively, for coatings prepared at 200-400 °C. Thus, the coatings prepared in this study by the sol - gel method appear as an efficient treatment for the corrosion protection of aluminum alloys. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-12-01 |
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=S1516-14392013000600014 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392013000600014 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392013005000115 |
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.16 n.6 2013 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_ |
1754212663240425472 |