Corrosion mitigation of alloy 304L in HCl solution using an environmentally compatible and sustainable extract
DOI:
https://doi.org/10.62638/ZasMat1780Abstract
The corrosion inhibition performance of Stylosanthes gracilis (SG) leaf extract on Alloy 304L stainless steel in 1.0 M HCl was investigated using gravimetric, electrochemical, GC–MS, adsorption, and SEM/EDX analyses. Results showed that the extract effectively reduced corrosion through the formation of a protective adsorbed film on the alloy surface. Corrosion rate and current density decreased with increasing extract concentration, while inhibition efficiency and polarization resistance increased significantly, reaching a maximum efficiency of about 94.6% at 1.2 g/L. The corrosion potential shift of 0.069 V indicated mixed-type inhibition behaviour. Adsorption studies revealed spontaneous adsorption following the Langmuir isotherm through combined physisorption–chemisorption mechanisms. Kinetic and residual analyses showed that the second-order model best described the inhibition process, suggesting cooperative adsorption interactions among phytochemical constituents. GC–MS analysis identified oxygen-, sulfur-, nitrogen-, and phosphorus-containing compounds responsible for adsorption and hydrophobic barrier formation. SEM/EDX results confirmed substantial reduction in chloride-induced surface degradation. The study demonstrates the long-term corrosion protection capability and industrial potential of SG extract as a sustainable green inhibitor for stainless steel in acidic environments.
Keywords:
Corrosion inhibition, electrochemical techniques, Alloy 304L, 1.0M HCl, stylosanthes gracilis extractReferences
B.O. Onyekpe (2002) Corrosion in oil and Gas Production. Ambik Press Benin City,
M.N.C. Ljeoma (1991) Elements of Corrosion and Protection Theory. Auto Century Publication Co. Ltd, Enugu,
M. Behpour, S.M. Ghoreishi, N. Khayat Kashani, N. Soltani (2009) Inhibition of 304 stainless steel corrosion in acidic solution by Ferula gumosa (galbanum) extract. Materials and Corrosion, 60(11), 895 – 898. http://dx.doi.org/10.1002/maco.200905182
N. Soltani, N. Tavakkoli, M. Khayatkashani, M.R. Jalali, A. Mosavizade (2012) Green Approach to Corrosion inhibition of 304 stainless steel in hydrochloric acid solution by the extract of Salvia officinalis leaves. Corrosion Science, 62(1), 122-135. http://dx.doi.org/10.1016/j.corsci.2012.05.003
R.V. Joseph Devaraj, V. Sivasangu, N. Sundharaj, D. A. Anbanantham, S.B. Moses, A. Aranganathan (2025) Adhutodavasica nees leaf extract as corrosion inhibitor for mild steel in acid medium. Zas. Materijala, 66 (2), 429 – 439. https://dx.doi.org/10.62638/ZasMat1219
Z.A. Foroulis (1982) Corrosion and corrosion inhibition in the petroleum industry. Werkstoffe and Korrosion 33, 121-131.
J.I. Bregman, (1963) Corrosion Inhibitors, The MacMillan Company, New York
T.A. Nguyen, X. Shi (2009) A mechanistic study of corrosion inhibiting admixtures.Anti-Corrosion Methods and Materials, 56(1), 3-12. http://doi.org/10.1108/00035590910923400
F.M. Donahue, K. Nobe (1965) Theory of Organic Corrosion Inhibitors: Adsorption and Linear Free Energy Relationships. Journal of Electrochemical Society, 112, 886-891. http://doi.org/10.1149/1.2423723
A.S. Fouda, A.S. Ellithy (2009) Inhibition effect of 4- phenylthiazole derivatives on corrosion of 304L stainless steel in HCl solution. Corrosion Science, 51, 868 – 875. http://doi.org/10.1016/j.corsci.2009.01.011
B. A. Rani, B. B. J. Basu (2012) Green inhibitors for corrosion protection of metals and alloys: an overview. International Journal of corrosion, 1, 380217.http://doi.org/10.1155/2012/380217
G.D. Davis, A.J. von Fraunhofer, L.A. Krebs, C.M. Dacres (2001) The use of Tobacco extracts as corrosion inhibitors. CORROSION, Paper 1558, http://doi.org/10.1016/j.porgcoat.2015.07.010
R. Saratha, V.G. Vasudha (2009) Inhibition of Mild steel corrosion in 1N H2SO4 medium by acid extract of Nyctanthesarbortristis leaves. E-J.Chem.6 (4), 1003-1008.
M.A. Quraishi, D.K. Yadav, I. Ahamad (2009) Green Approach to Corrosion Inhibition by Black Pepper Extract in Hydrochloric Acid Solution. The Open Corrosion Journal, 2, 56-60.
N. Soltani, N. Tavakkoli, M. Khayat Kashani, A. Mosavizadeh, E.E Oguzie, M.R. Jalali (2014) Silybummarianum extract as a natural source inhibitor for 304 stainless steel corrosion in 1.0 M HCl. Journal of Industrial and Engineering Chemistry, 20 (5), 3217-3227. http://dx.doi.org/10.1016/j.jiec.2013.12.002
O. E. Malomo, S. A. Yaro, D.S. Yawas, A.S. Akande, A. S. (2016) Inhibitive and Mechanical Properties of Cock's Comb and African Star Apple Leaves Extract on the Corrosion of Medium Carbon Low Alloy Steel In 1 M H2SO4 Solution. Annals of the Faculty of Engineering Hunedoara, 14(3), 39-48.
O. Ofuyekpone, R.O Akaluzia, S. Edibo (2017) Investigating the influence Ofimmersion time and inhibitor concentration on the inhibiting potential of imperrata cylindrica as Corrosion Inhibitor of mild steel. International journal of research in engineering and innovation, 1(6), 147-152
O.D. Ofuyekpone, E.S. Edibo, (2018) Investigating the Corrosion Resistance Behaviour of Zinc Metal–matrix Composite Reinforced with imperrata cylinderica.International Journal of Applied Research and Technology. 7(12), 65 – 72.
S.C. Udensi, E.O. Ekpe, L.A. Nnanna (2020) Newbouldia laevis Leaves Extract as Tenable Eco‑Friendly Corrosion Inhibitor for Aluminium Alloy AA7075‑T7351 in 1 M HCl Corrosive Environment: Gravimetric, Electrochemical and Thermodynamic Studies. Chemistry Africa,3(2), 303-316. https://doi.org/10.1007/s42250-020-00131-w
P. S. Neriyana, V. D. Alva(2020) A Green Approach: Evaluation of Combretum indicum (CI) Leaf Extract as an Eco‑friendly Corrosion Inhibitor for Mild Steel in 1M HCl. Chemistry Africa, 3(4), 1087-1098. https://doi.org/10.1007/s42250-020-00190-z
K. Cissé, D. Gassama, A. Thiam, M. Bathily, M. Fall, (2021) Evaluationof the Inhibitory Effectiveness of Cyperus articulates Essential Oils on the Corrosion of Structural Steelwork in Hydrochloric Acid Solution. Chemistry Africa, 4(2), 379-390. https://dx.doi.org/10.1007/s42250-021-00229-9
M. Benahmed, I. Selatnia, N. Djeddi, S. Akkal, H. Laouer (2019) Adsorption and Corrosion Inhibition Properties of Butanolic Extract of Elaeoselinum thapsioidesand Its Synergistic Effect with Reutera lutea (Desf.) Maires (Apiaceae) on A283 carbon Steel in Hydrochloric Acid Solution. Chemistry Africa, 3(3–4), 232-243, https://dx.doi.org/10.1007/s42250-019-00093-8
R. Narasimha (2020) Green Compounds to Attenuate Aluminum Corrosion in HCl,Activation: A Necessity Review. Chemistry Africa 3,21–34. https://doi.org/10.1007/s42250-019-00114-6
A. N. Pavel (2025) The inhibitory properties of the boiling extracts from Fagus sylvatica purpurea fallen leaves on the corrosion of mild steel in acidic environments. Zastita Materijala, 66(1), 206-214 https://dx.doi.org/10.62638/ZasMat999
S.A. Abdlmanam, Elmaryami, A.A. Abdullah, A.M. Miftah, G. R. Rahel, O. S. AbdulHamid, M.S. Salah, A. Garret (2025) An evaluation of wood ashes as an eco-friendly environmentally corrosion inhibitor for low carbon steel in acidic solution at different temperatures. Zastita Materijala, 66 (2), 412 – 420. https://doi.org/10.62638/ZasMat1236
R.T Loto, C.A. Loto, A.P.I. Popoola, T.I. Fedotova (2014) Inhibition Effect of 2-Amino, 5-Ethyl- 1, 3, 4 Thiadiazole onthe Corrosion of Austenitic Stainless Steel Type 304 in DiluteSulphuric Acid. Portugaliae Electrochimica Acta, 32(5), 337-354. https://doi.org/10.4152/pea.201405337
P. Kumar, K.N. Mohana (2014) Phytochemical Screening and corrosion inhibitive behaviour of Pterolobium hexapetalum and Celosia argentea plant extracts on mild steel in industrial water medium. Egyptian Journal of Petroleum, 23, 201-211. http://doi.org/10.1016/j.ejpe.2014.05.007
T.C. Egbosiuba, I.E. Chukwunyere, C.O. Awere, N.M Amadi, B.O. Okafor, J.O. Ezeugo, O.D. Onukwuli, N. Arrousse, E. Berdimurodov, V. C. Anadebe (2025), Psidium guajava L. extract as corrosion inhibitor for mild steel in an acidic environment: Experimental and computational insights. International Journal of Electrochem.Science, 20, 101031. https://doi.org/10.1016/j.ijoes.2025.101031
M. Scendo, (2013) Adenine as an Effective Corrosion Inhibitor for Stainless Steel in Chloride Solution. International Journal of Electrochemical Science, 8, 9201-9221
A.H. Al-Uqaily, R.A.H. Subhi Al-Bayaty, A.A. Khadom, M.K. Mustafa (2022) Inhibitive performance of 4-methoxyphenethylamine on low-carbon steel in 1 M hydrochloric acid: kinetics, theoretical, and mathematical views. J. Mol. Liq. 350, 118523.
O. D.Ofuyekpone, A. A. Adediran, O. G. Utu, B. O. Onyekpe and U.G. Unueroh (2023) Non-toxic leguminous plant leaf extract as an effective corrosion inhibitor of UNS S30403 in 1M HCl. J. Electrochem. Sci. Eng. 13 (2), 231-250. http://dx.doi.org/10.5599/jese.1343.
O.D. Ofuyekpone, O. G. Utu, B. O. Onyekpe, U. G. Unueroh, A. A. Adediran (2023) Corrosion Inhibition of Chloride Induced Attack on AISI 304L Using Novel Corrosion Inhibitor: A Case Study of Extract of Centrosema pubescens. Chemistry Africa,6, 459-476. https://dx.doi.org/10.1007/s42250-022-00506-1
O.D. Ofuyekpone, S.O. Okuma, S. Iweriolor, O.G. Utu (2025) Chemical Compounds from GC/MS Analysis, Functional Investigations, and Corrosion Inhibition Efficacy of a Bio-based and Sustainable Extract against HCl Solution-Activated Corrosion. J Bio Tribo Corros, 11, 37. https://doi.org/10.1007/s40735-025-00950-9
O. D. Ofuyekpone, O. G. Utu, B.O. Onyekpe, A. A. Adediran, M. Oki (2020) Evaluation of protection performances of Stylosanthes gracilis extract against 304L corrosion in H2SO4 solution.Case Studies in Chemical and Environmental Engineering, 2,100058. https://doi.org/10.1016/j.cscee.2020.100058
I.E. Uzoma, M.M. Solomon, R.T. Loto, S.A. Umoren (2022) Aspartame as a green and effective corrosion inhibitor for T95 carbon steel in 15 wt% HCl solution. Sustainability, 14 (11), 6500.
M.M. Solomon, S.A. Umoren, M.A. Quraishi, M. Salman (2019) Myristic acid based imidazoline derivative as effective corrosion inhibitor for steel in 15% HCl medium. J. Colloid Interface Sci. 551, 47–60.
M.M. Solomon, S.A. Umoren, M.A. Quraishi, D.B. Tripathy, E.J. Abai (2020) Effect of akyl chain length, flow, and temperature on the corrosion inhibition of carbonsteel in a simulated acidizing environment by an imidazoline-based inhibitor.J. Pet. Sci. Eng. 187, 106801
M. Rajendran, T.S. Muthumegala, A. Krishnaven (2011) Green Corrosion Inhibitors- An Overview, Journal of Science and Industrial Research. Zaštita Materijala, 52(1), 1 -19
V. Sribharathy, S. Rajendran, J. Sathyabama (2011) Inhibition of Mild Steel Corrosion in Seawater by Daucus carota. International Journal of Chemical Science and Technology, 1(3), 108 – 115.
M. Shabani-Nooshabadi, M.S. Ghandchi (2015) Introducing the Santolina chamaecyparissus extract as a suitable green inhibitor for 304 stainless steel corrosion in strong acidic medium. Metallurgical and Materials Transactions A, 46(11), 5139-5148.
R.T. Loto, C.A. Loto (2012)Effect of P-Phenylediamine on the Corrosion of Austenitic Stainless steel Type 304 in Hydrochloric Acid. International Journal of Electrochemical Science,7, 9423-9440.
R.T. Loto, C.A. Loto, T. Fedotova (2012) Inhibition Effect of N, N'-Dimethylaminoethanol on the Corrosion of Austenitic Stainless Steel Type 304 in 3M H2SO4. International Journal of Electrochemical Science, 7, 10763-10778.
R.T. Loto, C.A. Loto, A.P.I. Popoola(2012) Effect of Aminobenzene Concentrationson the Corrosion inhibition of Mild Steel in Sulphuric acid.International Journal of Electrochemical Science 7, 7016 – 7032.
S. Sair, A. Oushabi, K. Nehhale, Y. Abboud, O. Tanane, A. El Bouari (2018) Date Palm Waste Extract as Corrosion Inhibitor for 304 Stainless Steel in 1 M HCl Solution.International Journal of Electrochemical Science, 13, 10642 – 10653. https://doi.org/10.20964/2018.11.38
I. Dehri, M.O. ¨ zcan (2006) The effect of temperature on the corrosion of mild steel in acidic media in the presence of some sulphur-containing organic compounds. Materials Chemistry and Physics, 98 (2), 316–323, https://doi.org/10.1016/j.matchemphys.2005.09.020.
S.A. Umoren, U.M. Eduok, A.U. Israel, I.B. Obot, and M.M. Solomon (2012) Coconut coir dust extract: a novel eco-friendly corrosion inhibitor for Al in HCl solutions. Green Chemistry Letters and Reviews, 5(3), 303-313. https://doi.org/10.1080/17518253.2011.625980
S.A. Umoren, U.M. Eduok, A.P. Udoh (2012) Synergistic inhibition effects between leaves and stem extracts of Sida acuta and iodide ion for mild steel corrosion in1 M H2SO4 solutions. Arabian Journal of Chemistry, 5, 325–337. https://doi.org/10.1016/j.arabjc.2010.09.006
S. Deng, X. Li (2012)Inhibition by Jasminum nudiflorum Lindl.leaves extract of the corrosionof aluminium in HCl solution. Corrosion Science, 64, 253–262. https://doi.org/10.1016/j.corsci.2012.07.017
X. Li, S. Deng (2012) Inhibition Effect of Dendrocalamus brandisii Leaves Extract on Aluminum in HCl, H3PO4 Solutions. Corrosion Science, 65, 299-308. https://doi.org/10.1016/j.corsci.2012.08.033
N. I. Kairi, J. Kassim (2013) The Effect of Temperature on the Corrosion Inhibitionof Mild Steel in 1 M HCl Solution by Curcuma Longa Extract. Int. J. Electrochem. Sci., 8, 7138 – 7155
K. Anbarasi (2018) Industrial application and inhibition properties of Cucurbita maxima on metal corrosion in aggressive medium. International Journal of Chemical Science, 2(1), 28-35
O. Sanni, A.P.I. Popoola, O. S. I. Fayomi (2019) Temperature Effect, Activation Energies and Adsorption Studies of Waste Material as Stainless Steel Corrosion Inhibitor in Sulphuric Acid 0.5 M. Journal of Bio- and Tribo-Corrosion, 5,8-23. https://dx.doi.org/10.1007/s40735-019-0280-2.
U.M. Eduok, M. Khaled (2015) Corrosion inhibition for low-carbon steel in 1 M H2SO4 solution by phenytoin: evaluation of the inhibition potency of another “anticorrosive drug”. Research in Chemical Intermediate 41, 6309–6324. https://dx.doi.org/10.1007/s11164-014-1741-3
R.T. Loto, C.A. Loto, A.P.I.Popoola, T. Fedotova (2015) Inhibition effect of butan-1-ol on the corrosion behaviour of austenitic stainless steel (type 304) in dilute sulphuric acid. Arabian Journal of Chemistry, http://dx.doi.org/10.1016/j.arabjc.2014.12.024.
O.L. Riggs (Jr), R.M Hurd (1967) Temperature coefficient of corrosion inhibition, Corrosion, 23 (8), 252 -260.
C.O. Akalezi, C.E. Ogukwe, E.A. Ejele, E.E. Oguzie (2016) Corrosion inhibition properties of Gongronema latifollium extract in acidic media. International Journal of Corrosion and Scale Inhibition, 5(3),232–247. https://dx.doi.org/10.17675/2305-6894-2016-5-3-4
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