Journal
CORROSION SCIENCE
Volume 209, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110773
Keywords
A; alloy; aluminium; B; AFM; EIS; polarization; C; Passive films
Funding
- CICECO-Aveiro Institute of Materials - national funds through the FCT/MEC (PIDDAC) [UIDB/50011/2020, UIDP/50011/2020]
- FCT [SFRH/BD/117518/2016]
- Portuguese Foundation for Science and Technology [IF/01284/2015]
- national funds (OE), through FCT-Fundacao para a Ciencia e a Tecnologia, I.P [57/2016, 57/2017]
- ERA.NET [RUS_ST2017-477]
- MSCA-RISE [101007430]
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This study investigated the application of nanometric layers of Al2O3 on aluminium alloy to suppress corrosion. The protective effect weakened over time due to the incorporation of vulnerable hydroxyl species in the film during low-temperature deposition.
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.
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