Work

Study of Extracts of A. rusticana as Corrosion Inhibitors of Mild Steel in 1 mol L –1 HCl Solution Using MALDI-TOF-MS

Year: 2025

Type: article

Abstract: Corrosion studies were performed using extracts of A. rusticana and their fractions through mass loss measurements, electrochemical impedance, and potentiodynamic polarization at concentrations of 100, 200, 400, 800, 1600, and 3200 mg L−1 in 1 mol L−1 HCl. The FT-IR, HPLC, ESI-MS(±), MALDI-FT-ICR(±), and MALDI-TOF(±) techniques were used for the chemical characterization of the extracts and their fractions. The ethyl acetate fraction of crude ethanolic extract (WEP-EtOAc) showed the highest inhibition efficiency, above 96%, verified by mass loss measurement with and without temperature variation and electrochemical tests. SEM and XPS analyses were performed for surface analysis. MALDI-TOF was also used for the ethyl acetate fraction of WEP, where the laser was applied directly to the metal plate under study. Even after washing, the glucosinolate chemical group was identified as the major component on the metal surface. This study suggests that glucosinolates are the possible main corrosion-inhibiting phytochemicals in the extract.

Source: ACS Omega

DOI: 10.1021/acsomega.5c07723

Authors: Iendel Rubio do Nascimento, Klícia Carla de Santana de Lima, Lidilhone Hamerski, Eliane D’Elia

Institution: Universidade Federal do Rio de Janeiro

Language: English

Topic: Corrosion Behavior and Inhibition

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro