abstract
Nanometric layers of Al2O3 were applied by atomic layer deposition (ALD) on 2024-T3 aluminium alloy. The ALD layers suppressed the corrosion of the alloy as confirmed by Scanning Kelvin Probe Force Microscopy (SKPFM), polarization curves and Electrochemical Impedance Spectroscopy (EIS). The protection provided by the ALD layers weakened with the time of immersion and this was attributed to the incorporation of hydroxyl species in the film during the deposition at low temperature (100 degrees C) making them vulnerable to water.
keywords
AL2O3; AA2024-T3; COATINGS; COPPER; RESOLUTION; CONTRAST; BEHAVIOR; ENERGY; SKPFM; FILMS
subject category
Materials Science; Metallurgy & Metallurgical Engineering
authors
Oliveira, MP; Silva, RM; Yasakau, KA; Bastos, A; Kallip, S; Zheludkevich, ML; Silva, RF; Ferreira, MGS
our authors
António Alexandre Cunha Bastos
Assistant Researcher
Kiryl Yasakau
Assistant Researcher
Marco Pinheiro de Oliveira
Laboratory Officer
Mário Guerreiro Silva Ferreira
Retired Professor
Ricardo Manuel Fonseca Lopes da Silva
Junior Researcher
Rui Ramos Ferreira e Silva
Associate Professor
Silvar Kallip
Assistant ResearcherProjects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Projeto de Investigação Exploratória: Kyril Yasakao (IF/01284/2015)
acknowledgements
Part of this work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020, financed by national funds through the FCT/MEC (PIDDAC). MPO thanks FCT for financial support (SFRH/BD/117518/2016). KY acknowledges the Portuguese Foundation for Science and Technology for the researcher grant (IF/01284/2015). ACB is funded by national funds (OE), through FCT-Fundacao para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19. SK thanks ERA.NET for project RUS_ST2017-477 ACTICOAT and MSCA-RISE 2020 for Grant no. 101007430 COAT4LIFE.