Electrochemical, gravimetric and surface studies of Phalaris canariensis oil extract as corrosion inhibitor for 316 L type stainless steel in H 2 O-LiCl mixtures.

Autor: Galvan E; Centro de Investigacion en Ingenieria y Ciencias Aplicadas, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico., Larios Galvez AK; Centro de Investigacion en Ingenieria y Ciencias Aplicadas, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico. ana.galvez@uaem.mx., Ramirez Arteaga AM; Facultad de Ciencias Quimicas e Ingenieria, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico., Sesenes RL; Facultad de Ciencias Quimicas e Ingenieria, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico., Rodriguez JGG; Centro de Investigacion en Ingenieria y Ciencias Aplicadas, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, 62209, Cuernavaca, Morelos, Mexico.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Oct 08; Vol. 14 (1), pp. 23370. Date of Electronic Publication: 2024 Oct 08.
DOI: 10.1038/s41598-024-75423-z
Abstrakt: The corrosion inhibition action of Phalaris canariensis extract on 316 L stainless steel in the H 2 O-35 (wt%) LiCl mixture at different temperatures has been evaluated with the aid of weight loss, potentiodynamic polarization curves, linear polarization resistance and electrochemical impedance spectroscopy tests. These studies were complemented by Fourier Transformed Infrared spectroscopy, FTIR, gas/mass chromatography analytical techniques and detailed scanning electronic microscopy studies. Results have indicated that Phalaris canariensis extract is an efficient inhibitor, with an efficiency that increases with its concentration, but it decreases as the temperature increases. Phalaris canariensis extract is physically adsorbed onto stainless steel according to a Temkin type of adsorption isotherm. Phalaris canariensis extract affected both anodic and cathodic electrochemical reactions with a stronger effect on the anodic ones, acting, thus, as a mixed type of inhibitor. Main compounds contained in the Phalaris canariensis extract were palmitic and oleic acids, responsible for its inhibitory properties.
(© 2024. The Author(s).)
Databáze: MEDLINE
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