Atomic layer deposition of TiO2 and Al2O3 thin films for the electrochemical study of corrosion protection in aluminum alloy cans used in beverage | Zendy

V M Dias | Zendy; William Chiappim | Zendy; Mariana Amorim Fraga | Zendy; Homero Santiago Maciel | Zendy; Fernanda Roberta Marciano | Zendy; Rodrigo Sávio Pessoa | Zendy

Open Access

Atomic layer deposition of TiO₂ and Al₂O₃ thin films for the electrochemical study of corrosion protection in aluminum alloy cans used in beverage

Author(s) -

V M Dias,

William Chiappim,

Mariana Amorim Fraga,

Homero Santiago Maciel,

Fernanda Roberta Marciano,

Rodrigo Sávio Pessoa

Publication year - 2020

Publication title -

materials research express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.383

H-Index - 35

ISSN - 2053-1591

DOI - 10.1088/2053-1591/aba557

Subject(s) - dielectric spectroscopy , materials science , corrosion , atomic layer deposition , linear sweep voltammetry , alloy , aluminium , nyquist plot , titanium , analytical chemistry (journal) , electrochemistry , thin film , cyclic voltammetry , metallurgy , nuclear chemistry , layer (electronics) , composite material , nanotechnology , electrode , chemistry , chromatography

Titanium dioxide (TiO 2 ) and aluminum oxide (Al 2 O 3 ) thin films, with thicknesses around 100 nm, were grown on commercial pure- and resin-coated Al substrates using the atomic layer deposition (ALD). A comprehensive and comparative study of corrosion protection was carried out by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) measurements for a set of six samples: two reference samples (Al-bare and Al-resin), and four ALD coated samples ( Al-TiO 2 , Al-Al 2 O 3 , Al-resin-TiO 2 , and Al-resin-Al 2 O 3 ). The LSV and EIS results display good mutual agreement, indicating a higher protection efficiency of all ALD-coated samples after immersion in NaCl. When compared to Al-bare, all ALD coated samples (TiO 2 or Al 2 O 3 ) showed a corrosion inhibition enhancement factor of 99%. Besides, our results demonstrated that Al-resin+Al 2 O 3 has 24.95% and 33.40% more corrosion inhibition than Al-Al 2 O 3 and Al-resin, respectively. EIS data were fitted by an equivalent electric circuit (EEC). The Nyquist and Bode plots from the experiments showed that ALD films are a potential candidate for altering/improving commercial resin-coated Al cans.

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