%0 Journal Article
%A Del Olmo Martínez, Rubén
%A Bastos, Alexandre
%A Yasakau, Kiryl
%A Sushkova, Alesia
%A Arrabal Durán, Raúl
%A Tedim, João
%T Corrosion inhibitor from nature: Fundamentals of tannic acid inhibition for AA2024 alloy
%D 2024
%U https://hdl.handle.net/20.500.14352/118090
%X This study addresses the fundamentals of corrosion inhibition of AA2024 alloy by tannic acid (TA), a Cr-free and eco-friendly natural product. To this end, the AA2024 alloy was immersed in NaCl solution (50 mM) with different TA concentrations (0.1–10 mM) for 7 days. Surface (SEM, Raman, and SKPFM) and electrochemical analyses (EIS, PDP, and SVET) revealed mixed inhibition after 1 day of immersion in TA solution. Long-term immersion tests in TA solutions produced a tannate-rich oxide film on the surface. The films with low tannate content (formed in 0.1 and 1 mM TA) showed the highest stability and corrosion resistance.
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