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Gustavo Tomas Galo,Andréia de A. Morandim‑Giannetti,Fernando Cotting,Idalina Vieira Aoki,Isabella Pacifico Aquino 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
The capacity of the Allium cepa L. extract from peel (ACP) and bulb (ACB) as a natural corrosion inhibitor for carbon steelwas evaluated. The corrosion characterization was performed by a gravimetric test, showing an inhibitor efficiency of 60%(ACP) and 67% (ACB). Electrochemical tests indicated higher corrosion resistance for carbon steel in the presence of theextracts, and the SEM images of steel samples confirm the results. These extracts were analyzed by the DPPH (2,2-diphenyl-1-picrylhydrazyl) method, confirming the antioxidant activity. The chemical characterization of the extracts by FTIR measurementsrevealed the presence of phenolic compounds with antioxidant capacity.