Sustainable Corrosion Inhibition of Carbon Steel in Sulfuric Acid by Using Neolentinus lepideus Extract
5 affiliations
- 1Department of Analytical Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, Plaza de las Ciencias 2, 28040 Madrid, Spain
- 2Centro de Investigaciones Biologicas, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Mexico
- 3Facultad de Ciencias Quimicas e Ingenieria, Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Mexico
- 4Departamento de Ingenieria Quimica y Metalurgia, Universidad de Sonora, Hermosillo 83000, Mexico
- 5Centro de Investigación en Ingenieria y Ciencias Aplicadas (CIICAp), Universidad Autonoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, Cuernavaca 62209, Mexico
Abstract
In this work, the potential use of Neolentinus lepideus extract as a green corrosion inhibitor for carbon steel in acidic media was investigated, together with its prospects as a renewable and biologically derived corrosion-control material for potential industrial applications. To achieve this, an experimental investigation was conducted using gravimetric measurements, potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). The results demonstrated that the N. lepideus extract effectively suppressed the corrosion of 1018 carbon steel, with the inhibition efficiency increasing progressively with extract concentration and reaching a maximum value of 89% at 400 ppm. The potentiodynamic polarization curves revealed no evidence of passive film formation and indicated that the extract acted as a mixed-type corrosion inhibitor, with a more pronounced influence on the cathodic reaction. In the absence of the inhibitor, the corrosion process was predominantly governed by charge-transfer reactions and remained essentially under the same control mechanism upon the addition of 400 ppm of Neolentinus lepideus extract. However, at lower concentrations of 100 and 200 ppm, the corrosion process appeared to be affected by the adsorption and desorption of intermediate species at the steel/solution interface. The incorporation of Neolentinus lepideus extract into the corrosive medium resulted in an increase in the charge-transfer resistance and a concomitant decrease in the double-layer capacitance, supporting the formation of a protective interfacial film on the steel surface. The inhibitory action of the extract may be associated with its content of phenolic compounds, amides, and polysaccharides, whose heteroatoms and functional groups can interact with the steel surface and contribute to the formation of a protective adsorbed layer. The calculated Gibbs free energy values of adsorption (ΔGads), which were less negative than −20 kJ mol−1, indicated that the adsorption of Neolentinus lepideus constituents onto the steel surface was predominantly physical in nature. Furthermore, the adsorption process was satisfactorily described by the Freundlich isotherm, suggesting heterogeneous adsorption involving surface sites with different adsorption energies.
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BibTeX
@article{martinezgonzalez2026sustainable,
title = {{Sustainable Corrosion Inhibition of Carbon Steel in Sulfuric Acid by Using Neolentinus lepideus Extract}},
author = {Jose de Jesus Martinez-Gonzalez and Isaac Tello-Salgado and Roy Lopez-Sesenes and Jesus Porcayo-Calderon and America Maria Ramirez-Arteaga and Ana Karen Galvez-Larios and Jose Gonzalo Gonzalez-Rodriguez},
journal = {Molecules},
year = {2026},
month = oct,
doi = {10.3390/molecules31213819},
url = {https://www.mdpi.com/1420-3049/31/21/3819},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Sustainable Corrosion Inhibition of Carbon Steel in Sulfuric Acid by Using Neolentinus lepideus Extract
AU - Jose de Jesus Martinez-Gonzalez
AU - Isaac Tello-Salgado
AU - Roy Lopez-Sesenes
AU - Jesus Porcayo-Calderon
AU - America Maria Ramirez-Arteaga
AU - Ana Karen Galvez-Larios
AU - Jose Gonzalo Gonzalez-Rodriguez
PY - 2026
DA - 2026/10/22
JO - Molecules
DO - 10.3390/molecules31213819
UR - https://www.mdpi.com/1420-3049/31/21/3819
AB - In this work, the potential use of Neolentinus lepideus extract as a green corrosion inhibitor for carbon steel in acidic media was investigated, together with its prospects as a renewable and biologically derived corrosion-control material for potential industrial applications. To achieve this, an experimental investigation was conducted using gravimetric measurements, potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). The results demonstrated that the N. lepideus extract effectively suppressed the corrosion of 1018 carbon steel, with the inhibition efficiency increasing progressively with extract concentration and reaching a maximum value of 89% at 400 ppm. The potentiodynamic polarization curves revealed no evidence of passive film formation and indicated that the extract acted as a mixed-type corrosion inhibitor, with a more pronounced influence on the cathodic reaction. In the absence of the inhibitor, the corrosion process was predominantly governed by charge-transfer reactions and remained essentially under the same control mechanism upon the addition of 400 ppm of Neolentinus lepideus extract. However, at lower concentrations of 100 and 200 ppm, the corrosion process appeared to be affected by the adsorption and desorption of intermediate species at the steel/solution interface. The incorporation of Neolentinus lepideus extract into the corrosive medium resulted in an increase in the charge-transfer resistance and a concomitant decrease in the double-layer capacitance, supporting the formation of a protective interfacial film on the steel surface. The inhibitory action of the extract may be associated with its content of phenolic compounds, amides, and polysaccharides, whose heteroatoms and functional groups can interact with the steel surface and contribute to the formation of a protective adsorbed layer. The calculated Gibbs free energy values of adsorption (ΔGads), which were less negative than −20 kJ mol−1, indicated that the adsorption of Neolentinus lepideus constituents onto the steel surface was predominantly physical in nature. Furthermore, the adsorption process was satisfactorily described by the Freundlich isotherm, suggesting heterogeneous adsorption involving surface sites with different adsorption energies.
SN - 1420-3049
ER -