Study of the Efficiency of the Amino Acid L-Histidine as a Corrosion Inhibitor of 1018 Carbon Steel in Saline Solution Without and with CO2 Saturation
| Autor: | M. J. S. Moura, R. B. Vasques, M. M. Levy, S. J. M. Magalhães, C. V. P. Pascoal, F. W. Q. Almeida-Neto, P. Lima-Neto, S. L. S. Medeiros, F. C. C. S. Salomão, E. B. Barros, W. S. Araújo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Materials Research, Vol 27, Iss suppl 1 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1516-1439 1980-5373 |
| DOI: | 10.1590/1980-5373-mr-2024-0135 |
| Popis: | L-histidine was analyzed in this work as a corrosion inhibitor for AISI 1018 carbon steel in chloride solution, without (pH 7) and with carbon dioxide saturation (pH 4). Mass loss methods and electrochemical tests were used. In a medium with pH 4 saturated with CO2, the inhibition efficiency values (IE%) did not reach 34%. For the pH 7 condition, an inhibition efficiency of up to 89% was observed. The values corroborated with the quantum chemistry and Density Functional Theory (DFT) calculations, showing that the histidine molecule is responsible for the excellent inhibition potential. A Fourier transform infrared spectroscopy (FTIR) study and a thermogravimetric study (TGA) of the amino acid were also carried out. The substrate surface was analyzed by scanning electron microscopy and atomic force microscopy. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|