Synthesis, Characterization and Electrochemical Studies on the Corrosion Inhibition Properties of Schiff Bases for Mild Steel in 1 M HCl Solution

Chimezie P. Ozoemena *

Department of Chemistry, University of Uyo, Akwa Ibom State, Nigeria.

Ekerete Jackson Boekom

Department of Chemistry, University of Uyo, Akwa Ibom State, Nigeria.

Inemesit, I. Akpan

Department of Chemistry, University of Uyo, Akwa Ibom State, Nigeria.

*Author to whom correspondence should be addressed.


Schiff bases (SBL1 and SBL2), non-toxic compounds were synthesized, characterized and  investigated as alternative anticorrosive additives for inhibition of mild steel corrosion in I M HCl acid medium. Corrosion of the steel was monitored by Potentiodynamic Polarization (PDP), Linear Polarization Resistance (LPR), Electrochemical Impedance Spectroscopy (EIS) and Weight Loss (WL) techniques. The novel Schiff base ligands obtained were characterized by Ultraviolet-visible and Fourier-Transform Infrared Spectroscopy. The elemental analysis data for the Schiff base ligands were used to confirm the formula of SBL1 as C17H20N2O2 and SBL2 as C24H21N5O2. Fourier-Transform Infrared spectroscopy suggest that the formation of a complex film on the mild steel surface was due to the adsorption of SBL1 and SBL2. The adsorption process was spontaneous and consistent with the mechanism of physical adsorption as best approximated by the Langmuir adsorption isotherm. Maximum inhibition efficiency was obtained at maximum concentration of 100 ppm for both SBL1 and SBL2 with SBL2 possessing the higher inhibition efficiency (86.21%) more than SBL1 (76.92%). Effectiveness of SBL1 and SBL2 reduced with increase in time and progressed with increase in concentration of SBL1 and SBL2. PDP measurements showed that SBL1 and SBL2 acted as a mixed type inhibitor. EIS measurement reveals that the corrosion process was controlled by charge transfer process. Values of the inhibition efficacy obtained from the different techniques were comparable. SEM micrographs of mild steel surface indicated good surface protection of SBL1 and SBL2.

Keywords: Schiff bases, corrosion, adsorption, inhibitor, mild steel

How to Cite

Ozoemena, C. P., Boekom, E. J., & Akpan, I. I. (2023). Synthesis, Characterization and Electrochemical Studies on the Corrosion Inhibition Properties of Schiff Bases for Mild Steel in 1 M HCl Solution. Chemical Science International Journal, 32(2), 30–50.


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Kavitha V, Gunavathy N. Mild Steel corrosion inhibition by Daucus carota pulp extract in 1 N hydrochloric acid medium. International Journal of Scientific Research in Science and Technology. 2016;2(6):249 – 256.

Akalezi CO. Enenebaku CK, Oguzie EE. Application of aqueous extracts of coffee senna for control of mild steel corrosion in acidic environments. International Journal of Industrial Chemistry. 2012;3:13–25.

Okoronkwo AE, Olusegun SJ, Olaniran O. Acid extract of Gliricidia sepium leaves as green corrosion inhibitor for mild steel in HCl solutions. African corrosion Journal. 2015;1:30-35.

4. Peter, A. and Sharma, S.K. Use of Azadirachta indica (AZI) as green corrosion inhibitor against mild steel in acidi medium. International Journal of Corrosion Scale Inhibition. 2017;6(2): 112-131.

Akalezi CO, Oguzie EE. Evaluation of anticorrosion properties of Chrysophyllum albdum leaves extract for mild steel protection in acidic media. International Journal of Industrial Chemistry. 2016;7:81- 92.

Samuel N, Ogah SPI, Obike A, Igwe JC, Ogbonna IV. Investigation of the inhibitory action of Brachystegia eurycoma (Achi) seed extracts on the corrosion of mild steel in 2M HCl by method of weight loss. International Journal of Scientific Research and Education. 2015;3:3744-3753.

Leon-Silva, U, Nicho, M, Gonz´alez-Rodr´ıguez, J and Salinas-Bravo, V. Synthesis and characterization of triazol derivative as new corrosion inhibitor for mild steel in 1M HCl solution complemented with antibacterial studies. Journal of Solid State Electrochemistry. 2010;14:1089–1100.

Gutierrez, E Rodr´ıguez JA. Cruz-Borbolla J. Alvarado-Rodr´ıguez JG, Thangarasu P. Corrosion inhibition of thiadiazole derivative for mild steel in hydrochloric acid solution. Corroion Science Journal. 2016;108:23–35.

EL Basiony NM, Elgendy A, Nady H, Migaheda M.A, Zaki EG. Adsorption characteristics and inhibition effect of two Schiff base compounds on corrosion of mild steel in 0.5 M HCl solution: Experimental, DFT studies, and Monte Carlo simulation. Royal Society of Chemistry Advances. 2019;9:10473–10485.

Haruna A, Rumah MM, Sani U, Ibrahim AK. Synthesis, characterization and corrosion inhibition studies on Mn (II) and Co (II) complexes derived from 1-{(Z)-[(2-hydroxyphenyl) imino]methyl}naphthalen-2-ol in 1M HCl Solution. International Journal of Biological, Physical and Chemical Studies. 2020;(3)1:9-18.

Monticelli C, Balbo A, Esvan J, Chiavaric C, Martini C, Zanotto F, Marvelli L, Robbiola L. Evaluation of 2-(salicylideneimino) thiophenol and other Schiff bases as bronze corrosion inhibitors by electrochemical techniques and surface analysis, Corrosion Science Journal. 2019;(148):144–158.

Flores-Frias EA, Gonzalez-Hernandez A, Barba V, Lopez-Sesenes R, Landeros-Martinez LL, Flores-De los Rios JP, Gonzalez-Rodriguez JG. Experimental and theoretical evaluation of new 3,3´-methylenedianiline Schiff bases as corrosion inhibitors for carbon steel in sulfuric acid. International Journal of Corrosion Science. 2021;(10)3:1189–1212.

Jamil DM, Al‑Okbi AK, Shaimaa BA, Ahmed AA, Abdulhadi K, Abu BM. Experimental and theoretical studies of Schiff bases as corrosion inhibitors. Chemistry Central Journal. 2018;(12):5, 7-16.

Ozoemena CP, Milam C, Ugwuoke MC. Experimental and theoretical studies on the corrosion inhibitive properties of mild Steel in 2m h2so4 acid solution by ethanolic extract of Brachystegia eurycoma seed. Asian Journal of Science and Technology. 2019;10(12):10532-10544.

Da Silva CM, Da Silva DL, Modolo LV, Alves RB, de Resende MA, Martins CVB, De Fátima Â. Schiff bases: A short review of their antimicrobial activities. Journal of Advanced Research. 2011;(1)2:1–8.

Zhang F, Tang Y, Cao Z, Jing W, Wu Z, Chen Y. Performance and theoretical study on corrosion inhibition of 2-(4-pyridyl)-benzimidazole for mild steel in hydrochloric acid. Corrosion Science. 2012;61:1-9.

Saha SK, Alokdut DC, Pritam G, Dipankar S, Priyabrata B. Adsorption and corrosion inhibition effect of Schiff base molecules on the mild steel surface in 1 M HCl medium: A combined experimental and theoretical approach. Royal Society of Chemistry. 2015;(17) 4:5667-5679.

Kailas KH, Sheetal JP, Anita PP, Apoorva HP. Four synthesis methods of schiff base ligands and preparation of their metal complex with IR and antimicrobial investigation. World Journal of Pharmacy and Pharmaceutical Sciences. 2016;5(2): 1055–1063.

Awe FE, Idris SO, Abdulwahab M, Oguzie EE. Theoretical and experimental inhibitive properties of mild steel in HCl by ethanolic extract of Boscia senegalensis. Cogent Chemistry. 2015; 1:1 -14.

20. Eddy, N.O. and Odiongenyi, A.O. Corrosion Inhibition and Adsorption Properties of Ethanol Extract of IT heinsia crinata / IT on mild steel in H2SO4. Pigment and Resin Technology. 2010;39(5):288-295.

Yadav S, Sharma A, Choudhary G, Monika, Sharma A. Inhibitive and adsorption properties of ethanolic extract of fruit of azadirachta indica on the corrosion of copper in HCL. Int. J. Innov. Res. Sci. Eng. Tech. 2014 3:16127 –16136.

Roy P, Sukul D. Corrosion inhibition of mild steel in acidic medium by polyacrylamide grafted Guar gum with various grafting percentage: Effect OF Intramolecular synergism Corrosion Science. 2015;88: 246–253.

Arukalam IO. Durability and synergistic effects of KI on the acid corrosion inhibition of mild steel by hydroxypropyl methylcellulose, Carbohydrate Polymer. International Journal of Material Science. 2014;112:291–299.

Begum AS. Mallika J, Gayathri P. Corrosion inhibition property of some 1, 3, 4- Thiadiazolines on Mild Steel in Acidic Medium. European Journal of Chemistry. 2010;58:132 –144.

Abd El-Rehim SS, Magdy A. Ibrahim M, Khaled F. 4-Aminoantipyrine as an inhibitor of mild steel corrosion in HCl solution. Journal of Applied Electrochemistry. 1999; 29(5):593-599.

Boghaei DM, Askarizadeh E, Bezaatpour A. Synthesis, characterization, spectroscopic and thermodynamic studies of charge transfer interaction of a new water- soluble cobalt(II) Schiff base complex with imidazole derivatives. Spectrochim Acta A Mol Biomol Spectrosc. 2008;69(2):624–628.

Shaker AM, Nassr LAE, Adam MSS. Hydrophilicity and acid hydrolysis of water-soluble antibacterial iron (II) Schiff base complexes in binary aqueous solvents. Russian Journal of General Chemistry. 2013;83:2460–2464.

Eddy NO, Awe FE, Gimba NO, Ebenso EE. Inhibitive effect of Prosopis cineraria on mild steel in acidic media. International Journal of Electrochemical Scienc. 2011;6: 920 - 931.

Anupama KK. Corrosion inhibition study of medicinal plant extracts and some of their components for mild steel in acid media. M. Sc Thesis, Department of Chemistry, University of Calicut. 2015;16.

Ituen EB, James AO, Akaranta O. Fluvoxamine-based corrosion inhibitors for J55 steel in aggressive oil and gas well treatment fluids. Egyptian Journal of Petroleum. 2016; 6:1 – 12.

Solomon MM, Umoren SA. Electrochemical and gravimetric measurements of inhibition of aluminum corrosion by poly (methacrylic acid) in H2SO4 solution and synergistic effect of iodide ions. Journal of Adhesion Science Technology. 2015; 76:104–116.

Ekerete JB, Essien KE, Okafor PC. Experimental and quantum studies: A new corrosion inhibitor for mild steel. Elixir International Journal of corrosion and Dye. 2016;90:37673-37678.

Li F, Yang X, Zhang W. 4-(Pyridin-4-yl) thiazol-2-amine as an efficient nontoxic inhibitor for mild steel in hydrochloric acid solutions. Royal Society of Chemistry Advances. 2019;9:10454–10464

Ituen EB, Onyewuchi A, Abosede J. Evaluation of performance of corrosion inhibitors using adsorption isotherm models: An overview. Chemical Science International Journal. 2017;18(1):1-34.

Oguzie EE. Corrosion inhibition of aluminum in acidic and alkaline media by Sansevieria trifasciata extract. Corrosion Science Journal. 2007;49:1527–1539.

Ebenso EE. Effect of halide ions on the corrosion inhibition of mild steel in H2SO4 using methyl red. Bulletin of Electrochemisry. 2004;19(5): 209 - 216.

Khaled KF. Corrosion control of copper in nitric acid solutions using some amino acids: A combined experimental and theoretical study. Corrosion Science. 2010;52:3225– 3234.

Loto CA. Inhibition effect of tea (Camellia sinensis) extract on the corrosion of mild steel in dilute sulphuric acid. Journal of Materials and Environmental Science. 2011;2:335–344.

Fouda AS, El-Abbasy HM, El-Sherbini AA. Inhibitive effect of Artemisia judaica herbs extract on the corrosion of carbon steel in hydrochloric acid solutions. International Journal of Corrosion Scale Inhibition. 2018;7(2):213–235.

Obot IB, Umoren SA, Ankah NK, Pyrazine derivatives as green oil field corrosion inhibitors for steel, J. Mol. Liq. 2019;277:749–761.

Solomon MM, Umoren SA, Quraishi MA, Tripathi DB, Abai EJ. Effect of akyl chain length, flow, and temperature on the corrosion inhibition of carbon steel in a simulated acidizing environment by an imidazoline-based inhibitor. Pet. Sci. Eng. J. 2020;187:106801.

Ugi BU, Obeten ME, Bassey MV, Hitler L, Adalikwu SA, Omaliko CE, Nandi DO, Uwah IE. Adsorption and inhibition analysis of aconitine and tubocurarine alkaloids as eco-friendly inhibitors of pitting corrosion in ASTM – A47 Low Carbon Steel in HCl Acid Environment. Indonesia Journal of Chemistry. 2022;22(1):1 – 16.

Tian Y, Zheng M. Inhibition effect of silicate and molybdate on the corrosion of SS 316 in neutral corrosive solution at high temperature, Mater. Res. Express. 2019; 6:096569.

Wang C, Chen J, Han J, Wang C, Hu B. Enhanced corrosion inhibition performance of novel modified polyaspartic acid on carbon steel in HCl solution, J. Alloys Compd. 2019;771:736–746.

Wang X, Jiang H, Zhang D, Hou L, Zhou W. Solanum lasiocarpum extract as green corrosion inhibitor for A3 steel in 1 M HCl solution, Int. J. Electrochem. Sci. 2019;14:1178–1196.

Zeino A, Abdulazeez I, Khaled M, Jawich MW, Obot IB. Mechanistic study of polyaspartic acid (PASP) as eco-friendly corrosion inhibitor on mild steel in 3% NaCl aerated solution, J. Mol. Liq., 2018;250: 50–62.

Ugi BU, Bassey VM, Obeten ME, Adalikwu SA, Nandi DO. Secondary plant metabolites of natural product origin-Strongylodon macrobotrys as pitting corrosion inhibitors of steel around heavy salt deposits in Gabu, Nigeria, J. Mater. Sci. Chem. Eng. 2020;8(5): 38–60.

Ugi BU, Obeten ME. Bassey VM. Boekom EJ, Omaliko EC, Ugi FB, Uwah IE. Quantum and electrochemical studies of corrosion inhibition impact on industrial structural steel (E410) by expired amiloride drug in 0.5 M solutions of HCl, H2SO4 and NaHCO3. Moroccan Journal of Chemistry. 2021;9(4):677–696