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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Main Authors: Gianluigi De Falco, Giuseppe De Filippis, Carmela Scudieri, Luca Vitale, Mario Commodo, Patrizia Minutolo, Andrea D'Anna, Paolo Ciambelli
Format: Article
Language:English
Published: AIDIC Servizi S.r.l. 2021-04-01
Series:Chemical Engineering Transactions
Online Access:https://www.cetjournal.it/index.php/cet/article/view/11365
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spelling 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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