Ceratonia siliqua pulp extracts as a green corrosion inhibitor for mild carbon steel in 1 M HCl

• M.A. Almomani, M.T. Hayajneh and W.M. AlSharman

Industrial Engineering Department, Faculty of Engineering, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan

Abstract: The anticorrosion behaviour of Ceratonia silique L. pulp extract on mild steel in 1 M HCl solution was studied by employing a potentiodynamic polarization test (PDP) and weight loss test with different concentrations at room temperature. The obtained results suggested that the C. siliqua pulp extract is an excellent corrosion inhibitor and its inhibition efficiency is both concentration and time-dependent. Inhibition efficiency η(%) is observed to increase with an increase in C. siliqua pulp extract concentration and an increase in immersion time. The maximum inhibition efficiency of 92.32% was observed at a concentration of 800 ppm at room temperature. As evident by PDP the C. siliqua pulp extract behaves as a mixed-type inhibitor, and the cathodic impact is predominant. The inhibitor adsorption on the mild steel surface is following the Langmuir adsorption isotherm, and the adsorption mechanism is physical adsorption. C. siliqua pulp extract is a suitable corrosion inhibitor for mild steel in 1 M HCl solution.

Keywords: corrosion, green inhibitor, mild steel, polarization, Ceratonia silique L.

Int. J. Corros. Scale Inhib., 2023, 12, no. 2, 793-810
doi: 10.17675/2305-6894-2023-12-2-23

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Back to this issue content: 2023, Vol. 12, Issue 2 (pp. 366-810)