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Journal of Electrochemical Science and Engineering, Vol. 15 No. 6, 2025.

Original scientific paper

https://doi.org/10.5599/jese.2860

Green inhibitor for corrosion protection of ASTM A1011 steel in saline medium using a dynamic system

Harold Ames ; Reseach Group in Corrosion and Materials (GI CORRMAT), Chemical Engineering and Textile Faculty, Universidad Nacional de Ingeniería, Av. Tupac Amaru, No. 210, Rimac, Lima, Perú
Karen Tufinio ; Reseach Group in Corrosion and Materials (GI CORRMAT), Chemical Engineering and Textile Faculty, Universidad Nacional de Ingeniería, Av. Tupac Amaru, No. 210, Rimac, Lima, Perú
Karin Paucar ; Reseach Group in Corrosion and Materials (GI CORRMAT), Chemical Engineering and Textile Faculty, Universidad Nacional de Ingeniería, Av. Tupac Amaru, No. 210, Rimac, Lima, Perú
Jesus M. Falcón ; Environmental Engineering Department, San Ignacio de Loyola University, Av. La Fontana, No. 550, La Molina, Lima, Perú
Abel Vergara ; Reseach Group in Corrosion and Materials (GI CORRMAT), Chemical Engineering and Textile Faculty, Universidad Nacional de Ingeniería, Av. Tupac Amaru, No. 210, Rimac, Lima, Perú *

* Corresponding author.

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Abstract

Currently, inhibitors represent an economical option for protecting metals against corrosion. However, most inhibitors are synthetic and harmful to the environment. The present study focuses on estimating the anticorrosive effect of Oreocallis grandiflora extract (OGE) on ASTM A1011 steel immersed in a 3.5 wt.% NaCl solution. The investigation was carried out using open circuit potential (OCP) and potentiodynamic polarization curves to different concentrations of OGE in saline solution using a dynamic system. The results of potentiodynamic polarization curves indicated that the corrosion rate of ASTM A1011 steel decreased as the OGE concentration was increased. This inhibitor demonstrated an efficiency of 64 to 88 % in enhancing the corrosion resistance of the steel substrates. The value of the free energy of adsorption was -23.59 kJ mol-1, indicating that the OGE molecules are spontaneously adsorbed onto the surface of the substrate. The results of this study showed that Oreocallis grandiflora extract has high potential as a green corrosion inhibitor, as it forms a barrier between the substrate and the corrosive solution.

Keywords

Oreocallis grandiflora extract; eco-friendly inhibitor; steel sheets; corrosion resistance; adsorption isotherm

Hrčak ID:

339940

URI

https://hrcak.srce.hr/339940

Publication date:

30.9.2025.

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