Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour
This paper presents a one-step method for the coating of aluminium alloy surfaces with titania nanoparticles. This method is based on a highly controllable and tunable technique for the production of thin coating layers of TiO2 nanoparticles by aerosol flame synthesis and direct thermophoretic depos...
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AIDIC Servizi S.r.l.
2021-04-01
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Series: | Chemical Engineering Transactions |
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doaj-bb265d34bdc64d0eaa0779b31d3135202021-04-16T20:10:42ZengAIDIC Servizi S.r.l.Chemical Engineering Transactions2283-92162021-04-0184Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion BehaviourGianluigi De FalcoGiuseppe De FilippisCarmela ScudieriLuca VitaleMario CommodoPatrizia MinutoloAndrea D'AnnaPaolo CiambelliThis paper presents a one-step method for the coating of aluminium alloy surfaces with titania nanoparticles. This method is based on a highly controllable and tunable technique for the production of thin coating layers of TiO2 nanoparticles by aerosol flame synthesis and direct thermophoretic deposition. More specifically, few nm diameter TiO2 nanoparticles in the form of anatase are synthesized by flame aerosol and directly deposited as thin film by thermophoresis on aluminium alloy AA2024 samples. Submicron coatings of different thicknesses were produced by changing the total deposition time. A thermal annealing treatment was fine-tuned using UV-Vis Absorption spectroscopy and applied in order to improve the adhesion of the coating on the aluminium surface. Electrochemical polarization measurements were performed to evaluate the corrosion resistance of coated aluminium substrates. The electrochemical polarization curves showed a significant increase of the corrosion potential of coated substrates with respect to the bare aluminium and a decrease in the current density. The coatings produced with higher deposition time and so greater thickness showed the best performances in terms of corrosion resistance.https://www.cetjournal.it/index.php/cet/article/view/11365 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gianluigi De Falco Giuseppe De Filippis Carmela Scudieri Luca Vitale Mario Commodo Patrizia Minutolo Andrea D'Anna Paolo Ciambelli |
spellingShingle |
Gianluigi De Falco Giuseppe De Filippis Carmela Scudieri Luca Vitale Mario Commodo Patrizia Minutolo Andrea D'Anna Paolo Ciambelli Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour Chemical Engineering Transactions |
author_facet |
Gianluigi De Falco Giuseppe De Filippis Carmela Scudieri Luca Vitale Mario Commodo Patrizia Minutolo Andrea D'Anna Paolo Ciambelli |
author_sort |
Gianluigi De Falco |
title |
Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour |
title_short |
Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour |
title_full |
Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour |
title_fullStr |
Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour |
title_full_unstemmed |
Production and Characterization of Nano-tio2 Coatings on Aluminium Alloy Surfaces with Improved Anticorrosion Behaviour |
title_sort |
production and characterization of nano-tio2 coatings on aluminium alloy surfaces with improved anticorrosion behaviour |
publisher |
AIDIC Servizi S.r.l. |
series |
Chemical Engineering Transactions |
issn |
2283-9216 |
publishDate |
2021-04-01 |
description |
This paper presents a one-step method for the coating of aluminium alloy surfaces with titania nanoparticles. This method is based on a highly controllable and tunable technique for the production of thin coating layers of TiO2 nanoparticles by aerosol flame synthesis and direct thermophoretic deposition. More specifically, few nm diameter TiO2 nanoparticles in the form of anatase are synthesized by flame aerosol and directly deposited as thin film by thermophoresis on aluminium alloy AA2024 samples. Submicron coatings of different thicknesses were produced by changing the total deposition time. A thermal annealing treatment was fine-tuned using UV-Vis Absorption spectroscopy and applied in order to improve the adhesion of the coating on the aluminium surface.
Electrochemical polarization measurements were performed to evaluate the corrosion resistance of coated aluminium substrates. The electrochemical polarization curves showed a significant increase of the corrosion potential of coated substrates with respect to the bare aluminium and a decrease in the current density. The coatings produced with higher deposition time and so greater thickness showed the best performances in terms of corrosion resistance. |
url |
https://www.cetjournal.it/index.php/cet/article/view/11365 |
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