Work

Corrosion inhibitor from nature: Fundamentals of tannic acid inhibition for AA2024 alloy

Year: 2024

Type: article

Abstract: 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.

Source: Applied Surface Science

DOI: 10.1016/j.apsusc.2024.161434

Authors: Rubén del Olmo, Alexandre Bastos, Kiryl Yasakau, Alesia Sushkova, Raúl Arrabal, João Tedim

Institutions: University of Aveiro, Universidad Complutense de Madrid

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,820

Funders: Universidad Complutense de Madrid, Centro de Investigação em Materiais Cerâmicos e Compósitos