Maximum Inhibition Efficiency Research Articles

Enhanced anti-corrosion characteristics of epoxy-functionalized graphene oxide nanocomposite coatings on mild steel substrates

This experimental investigation focused on coating of functionalized graphene oxide (FGO) on the mild steel to minimize corrosion, using a new method. Prior to the coating, the fundamental chemical and morphological structures of FGO were studied with aid of some characterization techniques: X-ray diffraction (XRD), Raman, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Various epoxy/FGO coating formulations with 10, 20, 30, 40 and 50 ppm of FGO were prepared and coated on the mild steel substrate, adopting dip coating method. Immersion test was carried out to observe the corrosion inhibition efficiency of the graphene. The adsorption isothermal behavior was also studied using various models and compared with the data obtained from the experimental results. From the results obtained, the formation of irregular rough patches and separation of platelets like zebra lines indicated the formation of graphene nanoparticles, as observed through morphological analysis. The occurrence of sharp peak at 24.3° in the XRD pattern depicted the existence of graphene in nanoscale. Electrochemical impedance (EI) and potentiodynamic polarization (PP) studies reported the maximum corrosion inhibition efficiency of 87% at 50 ppm concentration of epoxy/FGO. It was evident that an increasing concentration of graphene exhibited significant corrosion resistance in both studies. The bonding energy of randomly oriented graphene platelets reduced the removal of metal, delaying the crack propagation in tortuous path on the coated surface. These results established the significance and applicability of this study in various relevant industries.

Corrosion inhibition performance and mechanism of triethanolamine-triisopropanolamine rust inhibitor in the simulated concrete pore solution

In this research, aiming to deal with the accelerated corrosion deterioration of steel reinforcement in reinforced concrete in harsh environments, a highly efficient rust inhibitor (triethanolamine (TEA)-triisopropanolamine (TIPA)) (abbreviated as TT), which TEA and TIPA compounded in a ratio 4:6, was proposed. The synergistic rust inhibition effect of TEA and TIPA on steel in the simulated concrete pore solution (SCPS), and its corrosion inhibition performance were investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), dry and wet cycling, and scanning electron microscopy (SEM) measurements. The results showed that TT inhibitor could obviously inhibit the corrosion of steel in the SCPS and could inhibit both cathode and anode. The electrochemical corrosion inhibition performance was the most excellent at the dosage of 1.0 %, and the maximum corrosion inhibition efficiency (η1) reached 95.39 %. After 150 times of dry and wet cycling, the percentage of the corrosion area (S), and corrosion inhibition efficiency (η2) with 1.0 % TT inhibitor were 9.3 % and 84.03 %, respectively, and the mass loss rate (M) decreased by 68.4 %, indicating a better rust inhibition performance. The adsorption of the TT inhibitor conformed to the Langmuir adsorption isotherm and inhibited the corrosion of steel by forming a protective film on steel surface through physicochemical adsorption. This study is of great significance to provide new perspectives and improvement measures to build up the deterioration and extend the service life of reinforced concrete in harsh environments.

Synergistic mixture of the Dactyloctenium aegyptium extract and KI as an environment friendly and highly efficient corrosion inhibitor for steel in 0.5 M HCl

To prevent steel from corroding in HCl solution, a cost-effective inhibitor of Dactyloctenium aegyptium and KI is presented. UV–Vis, infrared spectroscopy, and scanning electron microscopy analysis are used to undertake a comprehensive experimental evaluation of the inhibitors and their interactions with the steel. The optimum concentration of the Dactyloctenium aegyptium extract (DAE) with the maximum corrosion protection efficacy is found via electrochemical measurements. The bioactive constituents of the DAE such as Tricin, Vanillic acid, p-hydroxybenzaldehyde, and p-hydroxybenzoic acid conferred a maximum inhibition efficiency of 95.7 % at 800 ppm. The inhibitory activity of its ethanolic extract increased with increasing concentration. Further various adsorption isotherm models including Langmuir, Temkin and Frendluich were used to understand the adsorption of the DAE on the metal surface. The DFT based investigations show that the active constituents of the DAE are highly polarized, soluble in aqueous solution and adsorb on the steel surface efficiently.

Schiff base derived from 2-hydroxy napthaldehyde as anti-corrosive for mild steel in acid media: experimental investigation and theoretical modelling

Schiff bases (SBs) have the fundamental characteristics of substances that are mostly eligible for testing as inhibitors of corrosion for various metal/electrolyte systems. Through their electron-rich centres, such as the > C = N– (imine) moiety, SBs adsorb and create a surface coating that mitigates corrosion. Because of its π-acceptor characteristics, the > C = N– (imine) moiety provides a strong bonding with the metallic ions. It's vital to note that SBs with polar substituents at the right locations can form chelates with the central metal ions; as a result, these SBs are anticipated to function better as corrosion inhibitors than SBs without substituents. Two distinct Schiff bases, NL1 and NL2, with naphthalene rings have been synthesised, and their structures have been confirmed by the use of 1H and 13C NMR spectrum methods. The anticorrosion potential of the NL1 and NL2 was further confirmed by quantum chemical calculations such as DFT studies and ESP diagrams. The corrosion inhibition potential of the NL1 and NL2 was investigated using the electrochemical method, demonstrating maximum corrosion inhibition efficiency up to 89.2% and 89.5%, respectively on mild steel in 1 M HCl media. The results are further supported by Scanning Electron microscopic (SEM) images and EDAX studies.

Investigating the synergistic effect of iodide ion and Michelia alba leaf extract on carbon steel in 0.5M H2SO4

The study examined the inhibitory effect of Michelia alba leaf extract (MALE) on carbon steel (CS) in 0.5M H2SO4 solution. Furthermore, the investigation explored the effect of KI to enhance the protection provided by MALE. The study demonstrates that both MALE and KI have corrosion inhibiting properties on CS in acidic solutions. However, when MALE and KI are combined, they exhibit a greater inhibitory effect. Corrosion inhibition efficiency was limited to 86.55% with 400mg/L MALE. The maximum corrosion inhibition efficiency was 51.84% when 400mg/L KI was used alone. However, when 800mg/L MALE was combined with 400mg/L KI in 0.5M H2SO4 solution, the efficiency increased to 95.02%. This increase can be attributed to the synergistic effect between MALE and KI. The SEM and XPS results further confirmed that the addition of KI could be more effective in preventing the corrosion of CS. The theoretical calculations demonstrate that constituents found in the extract, which are rich in hydroxyl groups, benzene rings, N and S atoms have a higher probability of adsorption onto the CS surface in parallel, thereby increasing the efficiency of corrosion inhibition significantly.

Gemini cationic surfactant of 1, 3-bis (dodecyl dimethyl ammonium chloride) propane as a novel excellent inhibitor for the corrosion of cold rolled steel in HCl solution

Gemini surfactants have become the research focus of novel excellent inhibitors because of their special structure (two amphiphilic moieties covalently connected at head group by a spacer) and excellent surface properties. It is proved by theoretical calculations that 1, 3-bis (dodecyl dimethyl ammonium chloride) propane (BDDACP) molecules can perform electron transfer with Fe (110). And it has a small fraction free volume, thus greatly reducing the diffusion and migration degree of corrosive particles. The potentiodynamic polarization curve showed that coefficients of cathodic and anodic reaction less than 1 and polarization resistance increased to 1602.9 Ω cm−2 after added BDDACP, confirming that BDDACP significantly inhibited the corrosion reaction by occupying the active site. The electrochemical impedance spectrum of imperfect semi-circle shows that the system resistance increases and double layer capacitance after added BDDACP. Weight loss tests also confirmed that BDDACP forms protective film by occupying the active sites on steel surface, and the maximum inhibition efficiency is 92 %. Comparison of the microscopic morphology showed that steel surface roughness was significantly reduced after added BDDACP. The results of time-of-flight secondary ion mass spectrometry show that steel surface contains some elements from BDDACP, which confirms the adsorption of BDDACP on steel surface.

Menadione sodium bisulfite as an efficient anti-corrosion additive for mild steel in acid corrosion: Electrochemical, surface morphological and theoretical studies

The corrosion inhibition behavior of Menadione Sodium Bisulfite (MSB) in 1.0 M HCl medium was evaluated using weight loss, electrochemical techniques (Tafel polarisation and Electrochemical impedance spectra), surface analysis (SEM and EDX), Density Functional Theory (DFT), Noncovalent interaction- Reduced Density Gradient (NCI-RDG) and Monte Carlo (MC) simulation techniques. Weight loss measurement showed that as inhibitor concentration increased, the corrosion rate decreased which means that a protective film formed on the metal surface. At 300 ppm, the inhibitor showed a maximum inhibition efficiency of 89.7 %. Tafel polarisation studies indicate that the inhibitor is mixed-type in nature. The inhibitor adsorption on the mild steel is the best fit for the Langmuir isotherm model. As the weak interaction of sodium and oxygen in the inhibitor molecules, the inhibitor exhibits two distinct equilibrium behaviors. (i) inhibitor with sodium (solid-state) and inhibitor without sodium (in liquid-state). These two behaviors were theoretically investigated using DFT and MD simulation studies. The inhibitor and metal interaction is further supported using these theoretical studies. The electron population of the inhibitor was analyzed using molecular electrostatic potential, NCI-RDG, Fukui function, and natural bond orbital analysis. These studies further give an understating of the inhibitor and metal interactions.

Versatility of Juçara (Euterpe edulis) extracts as corrosion inhibitors of mild steel in different environments: 1 mol L−1 HCl and CO2-saturated formation water

Developing a sustainable and environmentally friendly inhibitor remains an essential and challenging goal for corrosion control. Here, different extracts from the same biomass (Juçara - Euterpe edulis) were applied as a new inhibitor for mild steel in different corrosive medium: 1 mol L−1 HCl (pH 0) and simulated CO2-saturated formation water (pH 5). Depending on the extraction process, the anticorrosive capacity of extracts may increase, a fact verified in gravimetric tests, reaching 94.4% maximum inhibition efficiency for the acidic medium (1000 mg L−1 of Juçara pulp in 48 h of immersion) and 86.1% inhibition efficiency for the saline medium (600 mg L−1 of Juçara pulp extract assisted by ultrasound in 24 h of immersion). Gravimetric tests, electrochemical tests, and surface and biochemical characterization analyses were carried out to better understand these extracts' performance. This work provides an interesting application of the same biomass effectively acting in different corrosive medium, depending on the extraction method.

Experimental and Theoretical Studies on Long Alkyl Chain-Bearing Dibenzotriazole Ionic Liquids as Eco-friendly Corrosion Inhibitors in Aqueous Hydrochloride Acid.

Three long alkyl chain-bearing dibenzotriazole ionic liquids (BTA-R-BTA, R = 8, 12, and 16) were synthesized with high yield (>98%) through a simple and eco-friendly process. Their anticorrosion performance for Q235 carbon steel in 6 M hydrochloride acid was comprehensively evaluated by weight loss tests, electrochemical methods (potentiodynamic polarization and electrochemical impedance spectroscopy), and surface analysis techniques. As the length of the alkyl chain increased, the maximum corrosion inhibition efficiency enhanced from 55.02% (for BTA-8-BTA at 1.2 mM) to 97.10% (for BTA-12-BTA at 0.3 mM) and 98.84% (for BTA-16-BTA at 0.3 mM). Density functional theory calculation indicated that the alkyl chain length had little influence on the inhibitors' electronic structures, while molecular dynamics simulations revealed that the thickness, surface coverage, and compactness of adsorption films formed at the metal-electrolyte interface increased with the elongated alkyl chain. Corrosion inhibition efficiency is strongly correlated with the structures of the adsorption film.

Investigation of a pyridazinone derivative as a corrosion inhibitor for carbon steel in acidic conditions using experimental and theoretical methods

The anti-corrosive properties of the newly synthesized compound pyridazinone, especially 2-(3-(4-fluorophenyl)-2-oxopropyl)-4-(3-nitrobenzyl)-6-phenylpyridazin-3(2 H)-one (FOPP), on carbon steel in a 1 M hydrochloric acid solution were thoroughly investigated. We used multiple techniques, including potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), surface morphology analysis, contact angle measurements, UV–visible spectrometry, and quantum chemical calculations. The maximum corrosion inhibition efficiency of FOPP was found to be 96.3 % at 10−3 M concentration and 303 K temperature. PDP studies showed that FOPP acts as a mixed-type inhibitor with anodic predominance. The hydrophobicity of the surface of the metal studied showed considerable improvement by the FOPP coating using the contact angle technique. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDX) were used to confirm the results obtained using the contact angle technique. The two methods of theoretical chemistry, namely density functional analysis (DFT) and molecular dynamics simulation, were used to gain a better understanding of the interactions between the inhibitor and the surface of the metal studied and the ability of this inhibitor to adhere to the surface of the iron and form a protective film.

Walnut (Juglans regia L.) fruit septum alcoholic extract as corrosion inhibitor for Fe B500B steel bars in mixed acidic solution

The corrosion inhibition performance of the walnut fruit (Juglans regia L.) septum alcoholic extract for Fe B500B steel bars in a mixed acidic solution (H2SO4/HCl) is reported. Weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements were performed at 298 to 318 K, with the addition of various extract concentrations. Results showed the maximum corrosion inhibition efficiency of 86.99 % for 300 mg L-1 extract added. The extract acts as a mixed-type inhibitor, predominantly affect­ing the anodic side, following Flory-Huggins adsorption isotherm. Thermodynamic analysis indicated an endothermic process with both chemisorption and physisorption on the steel bar surface. Surface characterization was conducted using ATR-FTIR, UV-vis and SEM techniques to prove the adsorption of the inhibitor molecules on the steel bar surface. Also, a possible adsorption mechanism of inhibitor molecules was proposed.

Bacterial growth inhibition in spring water utilizing silver nanoparticles: Optimization using central composite design

Ensuring safe drinking water remains a significant challenge due to the prevalence of waterborne diseases. While chlorine-based and UV-based methods effectively kill pathogens, they often generate harmful byproducts. Consequently, there's a pressing need for innovative techniques, such as utilizing silver nanoparticles(AgNPs) renowned for their antibacterial properties. In this study, a chemical reduction technique was employed to synthesize AgNPs. Subsequently, these AgNPs underwent comprehensive characterization using techniques such as FTIR, XRD,TGA and XPS. The synthesized nanoparticles were then applied for disinfecting spring water. The experimental design was meticulously planned using the central composite design method (CCD) from Response Surface Methodology (RSM), facilitated by Design Expert software. Three key factors: AgNPs, pH, and contact time were varied across three levels, resulting in a total of 20 designed experiments. These experiments were conducted in accordance with the specified run order, culminating in the achievement of maximum bacteria growth inhibition efficiency of 99.72 % at the optimal conditions of 0.01 mg/100 mL AgNPs dose, a pH of 6, and a contact time of 20 min. Overall, the findings of this study underscore the efficiency of AgNPs in disinfecting spring water.

Synergistic inhibition mechanism of imidazolidine and sodium lauryl polyoxyethylene ether sulfate for Q235 steel in H2SO4 solution: Combining experimental measurements with theoretical calculations

The synergistic inhibition mechanism of imidazolidine (IM) with sodium lauryl polyoxyethylene ether sulfate (SLPES) for the corrosion of Q235 steel in H2SO4 solution was systematically studied by experimental and theoretical methods. The results show that there is a synergism between IM and SLPES with a maximum inhibition efficiency of 94.5 %. IM/SLPES retards both anodic and cathodic reactions to more extent as compared with IM or SLPES. SEM, AFM, CLSM and XPS reveal that IM/SLPES can form a denser inhibition film on steel surface through the co-adsorptions of IM and SLPES, which can also well be elucidated by theoretical calculations.

Sodium hyaluronate as an effective eco-friendly inhibitor for corrosion control

ABSTRACT Corrosion mitigation of mild steel (MS) using the expired drug sodium hyaluronate (SH), as a green inhibitor, in 0.5 M HCl solution was evaluated by electrochemical methods and adsorption studies. Varied concentrations of SH drug (0.005, 0.01, 0.02, and 0.04 gL−1) were added and the corrosion rate (CR) of mild steel was measured at 303 and 308 K. Kinetic parameters were calculated and results were fitted into suitable adsorption isotherms. Contact angle measurement was used as a tool to understand the hydrophobicity of the material after the adsorption of the inhibitor. Adsorption of the inhibitor was confirmed by surface studies like scanning electron microscopy (SEM) and elemental dispersion analysis (EDX). A suitable mechanism was proposed for the adsorption of the inhibitor onto the surface of the material. The inhibition efficiency increased with an increase in the concentration of inhibitor and decreased with temperature. Using potentiodynamic polarisation data, a maximum inhibition efficiency of 91% in 0.5M HCl at 303 K and a concentration of 0.04 g/L SH was obtained. The inhibitor acted as a mixed type and obeyed the Langmuir adsorption isotherm. Contact angle measurement established the hydrophobicity of the MS surface after the addition of SH. Surface studies reaffirmed the adsorption of the inhibitor on the material. A suitable mechanism was proposed for the corrosion and inhibition process.

Thiourea derivatives as efficient inhibitors for the corrosion of cold rolled steel in citric acid solution: experimental and computational studies

The prediction of the corrosion inhibition properties of organic compounds from experimental and computational results is a highly interesting field. Correct understanding of substituents or electronic effects can significantly contribute to the design of efficient inhibitors. In this research article, the corrosion inhibitory performance of thiourea (TU), 1,3-dimethylthiourea (DMTU), N-ethylthiourea (ETU), and 1-p-tolylthiourea (p-TTU) in 1.0 M citric acid (H3C6H5O7) solution for cold rolled steel (CRS) was fully investigated by experimental measurements and theoretical calculations. The results show that the inhibition performance of p-TTU exhibits the best inhibition property among these four thiourea derivatives with a maximum inhibition efficiency of 97.36%. The inhibition ability follows the order of p-TTU > DMTU > ETU > TU. Potentiodynamic polarization curves indicate that all these thiourea derivatives are mixed-type inhibitors, where TU, ETU and DMTU mainly inhibit the cathodic reaction, but p-TTU effectively retards both cathodic and anodic reactions. Nyquist mainly appears a depressed capacitive loop, and the charge transfer resistance increases significantly with the addition of thiourea derivatives. The adsorption of four thiourea derivatives on CRS surface conforms to Langmuir adsorption isotherm. The micrographs from SEM and metallurgical microscopy further support the protection effectiveness of thiourea derivatives on the steel surfaces. Quantum chemical calculations and molecular dynamics simulations can well elucidate the relationship between molecular structure and inhibition efficiency for the studied thiourea derivatives.

Facile synthesis, corrosion inhibition, adsorption and DFT studies of 2-(4-(methylsulfanyl) phenyl) −4, 5-diphenyl-1H-imidazole for mild steel in acidic environment

A green, solvent-free, cost effective one-pot synthesis method is employed to produce the innovative corrosion-inhibiting compound 2-(4-(methylsulfanyl)phenyl)-4,5-diphenyl-1H-imidazole (MDPI). The molecular structure of MDPI can be identified using CHN analyses, FT-IR, 1H and 13C NMR spectra. Various electrochemical and gravimetric techniques are utilized to evaluate the anti-corrosion properties of MDPI. The results indicate that MDPI effectively inhibits the corrosion of mild steel under all tested conditions. At 306 K, MDPI achieved a maximum corrosion inhibition efficiency of 98.01 % at a concentration of 10 mM. MDPI exhibited strong adsorption and excellent anti-corrosion properties, forming a protective layer on the mild steel surface. The Langmuir adsorption isotherm, with a ΔGoads value of −39.55 kJ/M was found to be more suitable for this study, indicating that the process occurred by physisorption. Tafel curves indicated that MDPI functions as a mixed-type corrosion inhibitor. Surface characteristics were analyzed using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and atomic force microscopy (AFM). Quantum chemistry studies revealed a HOMO-LUMO energy gap of 3.926 eV, corroborating the anti-corrosion effectiveness of MDPI in hydrochloric acid solution. MDPI exhibited promising anti-corrosion activity due to its heterocyclic ring containing nitrogen heteroatoms as well as a methylsulfanyl functional group.

Corrosion inhibition by amino acid functionalized chitosan derivative at Q235 steel/ H2SO4 solution interface: Experimental and surface investigations

The present work describes the chitosan derivative development using amino acid (Vanilline) (CASB). The developed compound was used as Q235 steel corrosion inhibitor in 1 M H2SO4 using weight loss, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP). The EIS results disclosed that CASB inhibits corrosion via charge transfer process. The PDP data indicated that CASB suppresses both the cathodic and anodic corrosion process. The maximum inhibition efficiency of CASB (100 mg/L) and KI+75 mg/L (CASB) are 95.8 % and 97.9 % respectively. The adsorption of CASB over the Q235 steel surface was confirmed using X-ray photoelectron spectroscopy (XPS). Morphological changes on the steel surface were monitored by scanning electron microscopy (SEM) and Atomic force microscopy (AFM). The Langmuir adsorption isotherm provided best fitting of experimental data. Density functional theory (DFT) and Molecular dynamic simulation (MD) suggests that neutral forms of CASB have more adsorption ability than neutral forms.

Electrochemical, Structural and Thermodynamic Investigations of Methanolic Parsley Extract as a Green Corrosion Inhibitor for C37 Steel in HCl

Phytochemical-rich natural extracts have recently attracted intense attention as green corrosion inhibitors and costly benign coating components for the protection of metallic structures of immense commercial importance. Herein, various methods were applied to assess the corrosion protection efficiency of a methanolic extract of parsley (Petroselinum crispum) (PCE) on carbon steel C37 in 1 M HCl. Initially, the chemical profile of PCE was analyzed using gas chromatography/mass spectrometry (GC/MS), and myristicin and apiol were identified as the main components. The results from the weight loss, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) techniques revealed a substantial reduction in the corrosion rate upon the use of PCE, with a maximum inhibition efficiency of 92% at 1 g L−1 PCE. To optimize the performance, the corrosion behavior was investigated over a temperature range of 303–333 K and for concentrations of 0.1–1 g L−1. The inhibition effectiveness increased at higher concentrations of PCE, whilst it decreased when the temperature was elevated. The query suggests that the adsorption process involves both physical and chemical mechanisms. The adsorption of PCE onto C37 was well described by the Langmuir adsorption isotherm. The data were used to determine the activation energy and thermodynamic parameters. The PCE coating acted as a mixed-type inhibitor, hampering both cathodic and anodic corrosion reactions. SEM further confirmed the formation of a protective coating film on the steel surface when exposed to PCE. UV-Vis and XRD were implemented to understand the inhibition mechanism and formed products at the microscopic and spectroscopic levels. Hence, the green PCE inhibitor may potentially be applied in corrosion mitigation due to its high corrosion protection efficacy and its environmentally benign nature.

Anti-corrosion performance of ethyl dimethyl propylammonium bis (trifluoromethyl sulfonyl) imide (EDMPA-TFSI) for AA3003 alloy in acid chloride solutions in the presence and absence of potassium iodide

This work aims to evaluate the anti-corrosion potential of ethyl dimethyl propylammonium bis (trifluoromethyl sulfonyl) imide (EDMPA-TFSI)-ionic liquid on AA3003 alloy in 0.5 M HCl solution in the presence and absence of potassium iodide at ambient and elevated temperatures. The corrosion inhibition of AA3003 alloy by EDMPA-TFSI in the presence of potassium iodide was evaluated using hydrogen evolution measurements at 303 K and 333 K. The results show that in the absence of potassium iodide, EDMPA-TFSI decelerates AA3003 corrosion in an acidic medium with a maximum inhibition efficiency of 93.2 % and 90.5 % obtained at 303 K and 333 K respectively. In the presence of potassium iodide, 94.7 % and 89.8 % inhibition efficiencies were obtained at 303 K and 333 K, respectively. This adsorption behavior is concordant with the Langmuir adsorption isotherm and the corrosion process in the presence of EDMPA-TFSI shows consistency with first-order reaction kinetics. New information on the application of EDMPA-TFSI as a workable corrosion inhibitor is provided herein.

Okra leaves extract as green corrosion inhibitor for steel in sulfuric acid: Gravimetric, electrochemical, and surface morphological investigations

Utilizing plant extracts as an alternative source for corrosion inhibitors holds significant promise in minimizing the risk of corrosion. In this study, an okra leaf extract (OLE) was employed as a corrosion inhibitor for N80 steel in 1.0 M H2SO4. The corrosion rate was assessed concerning temperature (30, 40, 50, and 60 °C) and inhibitor concentrations (blank, 25, 50, 75, and 100 ml/l) through weight loss and electrochemical polarization techniques. The results indicated that OLE functions as a mixed-type corrosion inhibitor, with corrosion rates increasing with temperature and decreasing with inhibitor concentration. The maximum corrosion inhibition efficiency reached 96 % at 30 °C and 100 ml/l. Adsorption studies revealed that OLE physically adsorbed onto the mild steel surface, following the Langmuir adsorption isotherm. Gravimetrical and electrochemical techniques were confirmed by FTIR and UV measurements, which showed the presence of a protective layer on the metal surface. Optical microscopy, AFM, and SEM images demonstrated the formation of a protective layer on the metal surface. Thermogravimetric analysis (TGA) highlighted the thermal stability exhibited by inhibitor molecules, which showed that OLE was thermally stable up to 85 °C.