Evaluation of Purple Onion (Allium cepa L.) Extract as a Natural Corrosion Inhibitor for Carbon Steel in Acidic Media
N/D
Tipo de produção
Artigo
Data de publicação
2021-09-05
Texto completo (DOI)
Periódico
Metals and Materials International
Editor
Texto completo na Scopus
Citações na Scopus
24
Autores
GALO, T. A.
Andreia de Araújo Morandim Giannetti
COTTING, F.
AOKI, I. V.
AQUINO, I. P.
Orientadores
Resumo
© 2020, The Korean Institute of Metals and Materials.Abstract: The capacity of the Allium cepa L. extract from peel (ACP) and bulb (ACB) as a natural corrosion inhibitor for carbon steel was 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 the extracts, 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 measurements revealed the presence of phenolic compounds with antioxidant capacity. Graphic Abstract: [Figure not available: see fulltext.]
Citação
GALO, T. A.; GIANNETTI, A. A. M.; COTTING, F.; AOKI, I. V.; AQUINO, I. P. Evaluation of Purple Onion (Allium cepa L.) Extract as a Natural Corrosion Inhibitor for Carbon Steel in Acidic Media. Metals and Materials International, v.27, n. 9, p. 3238-3249, 2021.
Palavras-chave
Keywords
Antioxidant activity; Corrosion; Natural corrosion inhibitor; Phenolic compounds