Corrosion Inhibition Research Articles

Realkalization of corroded rebar in mortar with monoethanolamine as a corrosion inhibitor: influence of total charge and applied electric field on repair effectiveness

ABSTRACT The realkalization process is an electrochemical technique to restore and enhance the pH level in carbonated concrete. This study investigated the effectiveness of realkalization using an alkaline solution (K2CO3) with monoethanolamine (MEA) as a corrosion inhibitor. Reinforced mortar specimens were subjected to accelerated carbonation, followed by accelerated corrosion of the embedded steel rebars. During the repair process, MEA was used to increase the polarization resistance of the rebar and provided surface protection. The effectiveness was evaluated by monitoring the corrosion potential and corrosion current density at various total electric charges. Comparative experiments without the electric field were also conducted. After repair, the pH values, potassium ions (K+) concentrations, and MEA contents of the mortar cover were measured. The results showed that the corrosion potential shifted positively, while the corrosion current density decreased, indicating a reduction in corrosion activity. Electrochemical and analytic results exhibited that a total charge of at least 150 A·h/m2 was required for effective repair. However, the long-time effectiveness was limited, as the steel rebars remained in a moderate corrosion state.

Investigation on corrosion inhibition characteristics of (1Z,4Z)-N′1, N′4-bis(4-methoxyphenyl) succinimidohydrazide for mild steel in 1.0 M HCl by weight loss measurements, surface imaging, and computational analysis

ABSTRACT This work focuses on the deployment of a Schiff base (SB), namely (1Z,4Z)-N′1, N′4-bis(4-methoxyphenyl) succinimidohydrazide (SBMPSH), against corrosion of mild steel (MS) in 1.0 M HCl. UV-visible spectroscopy (UVS), Fourier-transform infrared spectroscopy (FTIRS), and H1 nuclear magnetic resonance spectroscopy (NMRS) have confirmed the characteristic molecules of SBMPSH. The weight loss measurements (WLM) have been performed in temperature ranges from 30o to 60o C. The utmost inhibition efficiencies (µwl) using 200 mg L−1 SBMPSH at 30o C and 60o C are recognised at 87% and 75%, respectively. The scanning electron microscopy (SEM) images and atomic force microscopy (AFM) measurements confirm that SBMPSH impressively protects MS. The adsorption of SBMPSH on MS has been also analysed and found to be in accordance with the Langmuir isotherm. The values of standard Gibbs free energy of adsorption (ΔG0 ads) at studied temperatures denote that adsorption is mixed-type adsorption. The adsorption characteristics have been further examined by density functional theory (DFT), and molecular dynamics (MD) simulations, which reveal that SBMPSH has great potential to be adsorbed on MS for its protection. Based on findings, an inhibition mechanism for SBMPSH is also suggested.

Characteristics of Air Nanobubbles in Circulating Cooling Water and Their Corrosion Inhibition Mechanism on Stainless Steel: The Role of Temperature.

The influence of temperature on the physicochemical properties of air nanobubbles (A-NBs) in a complex salt solution is crucial for their application in corrosion inhibition within circulating cooling systems. The variation patterns of the physicochemical properties, the corrosion inhibition of A-NBs on stainless steel and their underlying mechanisms in the temperature range of the circulating cooling system were investigated. Results indicated that increasing temperature led to a decrease in the number concentration of A-NBs, their average particle size, and the absolute value of the zeta potential gradually. Weight loss measurements, electrochemical analyses, and morphological characterizations of corrosion specimens demonstrated that A-NBs exhibited effective corrosion inhibition, particularly at concentrations on the order of 107 particles/mL and temperature ≤50 °C. Electrical conductivity, impedance, and surface characterizations of the corrosion specimens revealed that elevated temperatures were detrimental to the stability of A-NBs and the bubble layer. The binding effect of A-NBs on corrosive ions, as well as the protective roles of the passive film, calcium carbonate scale, and bubble layer on the stainless steel surface, were weakened, leading to an accelerated corrosion rate. This study provides insights into the industrial application of A-NBs as an environmentally friendly corrosion inhibition technology.

Corrosion-Resistant and Conductive Coatings on 316L Stainless Steel Bipolar Plates Fabricated by Hot Rolling

The insufficient corrosion resistance and high interfacial contact resistance (ICR) of 316L stainless steel (316L SS) severely limit its application as bipolar plates (BPs) in proton exchange membrane fuel cells (PEMFCs). In this study, a graphite/carbon black/PVDF composite coating was first developed by hot rolling on the surface of 316L SS to enhance both corrosion resistance and conductivity. By incorporating 5 wt% polyaniline (PANI) as a corrosion inhibitor, the optimized RP5 coating exhibited further improvements in corrosion resistance. The potentiodynamic polarization tests revealed that the RP5 coating achieved a corrosion current density of 0.977 μA·cm−2, representing a two-orders of magnitude reduction compared to bare 316L SS (34.1 μA·cm−2). The coating also exhibits a satisfactory interfacial contact resistance (ICR) of 8.20 mΩ·cm2 at 1.5 MPa, meeting the U.S. Department of Energy (DOE) 2025 targets (<10 mΩ·cm2). Additionally, the RP5 coating exhibited superior hydrophobicity with a water contact angle of 96.5°, which is advantageous for water management within PEMFCs. The results confirm that the RP5 coating achieves an optimal balance between high conductivity, excellent corrosion resistance, and improved hydrophobicity, making it a promising solution for advancing PEMFC bipolar plates’ performance.

Mechanistic evaluation of NO2 sequestered recycled concrete aggregates as anodic corrosion inhibitors in chloride-exposed OPC concrete: insights from kinetics and performance assessment

Mechanistic evaluation of NO2 sequestered recycled concrete aggregates as anodic corrosion inhibitors in chloride-exposed OPC concrete: insights from kinetics and performance assessment

Bio Synthesis of Nanoparticles from Bio Waste and Its Application on Anti Corrosion, Antifungal and Paint Applications

This study demonstrates the green synthesis of zinc oxide (ZnO) nanoparticles using pomegranate and orange peel extracts, with pomegranate proving more effective based on a UV-Vis absorption peak at 390 nm. SEM and DLS analyses revealed nanoparticle sizes ranging from 100–250 nm and an average hydrodynamic diameter of 238.7 nm (PDI 0.296). FTIR confirmed the presence of phytochemical capping agents, while XRD validated a hexagonal wurtzite structure. The nanoparticles exhibited strong antifungal activity, with 100 µL of ZnO formulation producing inhibition zones of 12 mm and 15 mm against Aspergillus flavus and Aspergillus niger, respectively. In corrosion resistance testing, ZnO-incorporated paint showed significantly less rust compared to normal paint after 10 days of salt spray exposure, and the nanoparticle spray visibly reduced rust within 5 minutes. These findings highlight the potential of fruit peel-derived ZnO nanoparticles as eco-friendly, multifunctional agents for antifungal coatings and corrosion prevention, aligning with green chemistry and sustainable waste utilization practices. KEYWORDS: Zinc Oxide Nanoparticles, Green Synthesis, Antifungal Activity, Corrosion Resistance, Surface Protection.

Isolation of Cinnamaldehyde and its application as a green corrosion inhibitor for A03081 alloy in 2.0 M HCl solution: Theoretical, Electrochemical and Thermodynamics studies

Isolation of Cinnamaldehyde and its application as a green corrosion inhibitor for A03081 alloy in 2.0 M HCl solution: Theoretical, Electrochemical and Thermodynamics studies

Corrosion Inhibition of Mild Steel Using Azadirachta indica Leaf Extract in an Alkaline Medium Containing Cl− Ions

AbstractMild steel (MS) corrosion is a grave concern in manufacturing industries. Neem leaf extract (NLE) (Azadirachta indica—AZI) was used as a green corrosion inhibitor (GCI) for MS with 1 wt% calcium hydroxide (Ca(OH)2) and 0.5 wt% sodium chloride (NaCl) (alkaline medium) and studied via weight loss technique, electrochemical impedance spectroscopy (EIS) study, and adsorption isotherm study. Weight loss experiments were conducted at 10–50 min immersion time. The findings show that the AZI extract inhibits MS corrosion in a 1 wt% Ca(OH)2 and 0.5 wt% NaCl solution. In the presence of Cl− ions, passivation breaks down and metal gets corroded at a higher rate. GCI is introduced to mitigate the problem of corrosion. Therefore, using GCI is essential for preventing metal from corrosion in an alkaline environment with chloride ions. The efficiency of inhibition decreases as immersion time increases. Inhibitor adsorption showed spontaneous physisorption and was best fitted by the Frumkin adsorption isotherm. From the EIS study, the highest inhibition efficiency was found to be ∼78 %. Scanning electron microscopy (SEM) image confirms a layer of protection with an inhibitor appearing over the metal surface. Fourier transform infrared (FTIR) analysis identifies NH2 group present in NLE, contributing to understanding its molecular interaction with the metal surface. X‐ray photoelectron spectroscopy (XPS) analysis reveals that NLE compounds form a complex on the metal surface, effectively slowing down the corrosion process. X‐ray diffraction (XRD) spectra show peaks corresponding to ferrous chloride (FeCl2) in the absence of an inhibitor, whereas this peak disappeared on the metal surface in the presence of NLE. This demonstrates that NLE effectively protects the metal from corrosion. AZI is used as green corrosion, as it is biodegradable, cheap, easily available, and economically viable.

Novel 8-hydroxyquinoline compounds used to inhibit mild steel corrosion in the presence of hydrochloric acid 1.0 M: an experimental and theoretical electrochemical study

ABSTRACT The present study examined the corrosion inhibition property of two derivatives of 8-hydroxyquinoline, namely diethyl 1,1-(4-(4-chlorophenyl)-1-((8-hydroxyquinoline-5-yl)methyl)-2, 6-dimethyl-1, 4-dihydropyridine-3,5-diyl) diethanone (P1) and diethyl 1,1-(4-(4-bromophenyl)-1-((8-hydroxyquinoline-5-yl)methyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-diyl)diethanone (P2). against mild steel (MS) degradation in 1.0 M hydrochloric acid (HCL) solution. The study was carried out using electrochemical techniques such as dynamic potential polarisation (DPP) and impedance spectroscopy (EIS) at different temperatures (298–328 K). Inhibition efficiency (IE %) increased with inhibitor concentration, reaching 97.0% for P1 and 91.8% for P2 at 10−3 M (298 K). Impedance measurements indicated that charge transfer resistance (Rct) increased, while double-layer capacitance (Cdl) decreased with increasing concentration of P1 and P2. Analysis of the polarisation curves shows that P1 and P2 act as mixed-type inhibitors. According to the Langmuir isotherm and thermodynamic parameters, P1 and P2 are adsorbed onto the mild steel surface by chemical interactions. The SEM/EDX analysis results revealed the formation of an adsorption film on MS. DFT calculations show that free heteroatom doublets of oxygen (O) and nitrogen (N) promote electron sharing between the molecules studied and the steel surface. Data from theoretical methods (DFT) confirm the experimental results.

Enhancing Adhesion and Corrosion Resistance of Epoxy Coatings on Steel Reinforcing Bars Through the Incorporation of Functional Interface Layers

ABSTRACTTo enhance the stability of epoxy (EP) coatings on steel bars while improving their active and passive corrosion protection properties, the functional composite coatings were designed and prepared. Intercalated zirconium phosphate nanofillers (LCZrP) loaded with corrosion inhibitors were firstly synthesized and designed, and then were integrated into silane coatings (SC), which were preapplied to the bar substrate to enhance the integrity and interfacial adhesion properties. Lastly, an epoxy layer was applied, resulting in the functional composite coatings (LCZrP/SC/EP). The chemical composition and surface morphology were performed using scanning electron microscopy–energy dispersive X‐ray spectroscopy (SEM‐EDS). The corrosion resistance of the coatings was evaluated using electrochemical impedance spectroscopy (EIS), complemented by adhesion tests to analyze the service stability of the coatings. The findings revealed that the silane interlayer notably improved the interfacial bonding at the junction where the epoxy resin interacts with the steel bar, thereby enhancing the corrosion resistance. Notably, the coating presented the optimal corrosion resistance when the nanofiller content was 0.04 wt.%. The impedance modulus at 0.01 Hz (|Z|0.01Hz) for the LCZrP/SC/EP coated coating was 5.05 × 1010 Ω·cm2, which was two orders of magnitude greater than that of the EP coatings and the EP coating with silane interlayer (SC/EP) by one order of magnitude. Following 30 days of immersion, its |Z|0.01Hz remained higher than the EP coating as well as the SC/EP coatings. The integral LCZrP/SC/EP coatings exhibit excellent long‐lasting corrosion protection, owing to the self‐responsive characteristics of LCZrP, the interfacial adhesion of the LCZrP/SC interlayer, and the enhanced barrier effect of the EP coatings. This combination effectively integrates active and passive protection strategies, thereby preventing metal corrosion. The above solution ensures that the coatings provide durable and reliable protection against corrosion over extended periods.

Enhancing Corrosion Inhibition Performance of Steel Bars with Modified MgAl-NO2-Layered Double Hydroxide Preparation Methods

Enhancing Corrosion Inhibition Performance of Steel Bars with Modified MgAl-NO2-Layered Double Hydroxide Preparation Methods

Carbon Dots for Anti-corrosion: A Review Describing in Detail the Application and Mechanism of Corrosion Inhibitors

Abstract: Corrosion is a spontaneous and unavoidable process that reduces the service life of materials. Most industries suffer from corrosion of manufacturing equipment. To effectively protect metals from corrosion, various strategies have been developed. Among these, the use of corrosion inhibitors is a widely adopted technique. Many commercial inorganic and organic substances have been proven to be effective inhibitors. However, most of them are toxic and pose environmental threats during their synthesis. In recent years, Carbon Dots (CDs) have gained widespread application as a green aqueous-phase corrosion inhibitor due to their eco-friendly properties and good water solubility. This article provides a comprehensive review on the research progress on CDs, systematically exploring the use of heteroatom-doped CDs as corrosion inhibitors for carbon steel, copper, and their alloys. The discussion includes synthesis methods, various morphologies and structures of CDs, corrosion resistance performance, kinetics, thermodynamics, quantum computational chemistry, and inhibition mechanisms. Additionally, the challenges, recommendations, and opportunities in this field are addressed. Through this review, readers will gain a deeper understanding of the potential of CDs as corrosion inhibitors, inspiring more scientists to make valuable contributions to this topic in the future.

Experimental and Surface Evaluation of Zinc Electroplating Efficiency and Corrosion Inhibition Effects of Centaurea napifolia Extracts

This study introduces Centaurea napifolia as a novel multifunctional corrosion inhibitor and a zinc-electroplating additive previously unexplored in the field. Hydro-methanolic, methylene dichloride, ethyl acetate, and n-butanol extracts were investigated for their dual functionality: inhibiting corrosion of carbon steel and improving the performance of zinc electrodeposition on mild steel. Using techniques such as potentiodynamic polarization, gravimetric methods, electrochemical impedance spectroscopy, scanning electron microscopy/energy dispersive spectroscopy, and profilometry, significant improvements in brightness, corrosion resistance, coating quality, and adhesiveness have been found. Notably, adding 3.2 g/l butanolic extract achieved an optimal corrosion rate of 0.038 mm/y, a substantial improvement over unplated mild steel and plated samples without additives, and reduced current density from 0.3235 mA/cm² to as low as 0.0033 mA/cm². These extracts showed effective inhibition against carbon steel corrosion in acidic environments with efficiencies up to 82%, following the Langmuir isotherm model with physical adsorption being spontaneous and exothermic, highlighting the potential of Centaurea napifolia extracts as eco-friendly alternatives for metal protection. These findings translate to significant economic opportunities for industries reliant on metal protection systems by offering eco-friendly alternatives that could reduce environmental impact while enhancing the durability of metal components used for practical or industrial applications.

Dual role of microorganisms in metal corrosion: a review of mechanisms of corrosion promotion and inhibition

The dual role of microorganisms in metal corrosion and corrosion inhibition reflects their complex biochemical interactions. In terms of corrosion, certain microorganisms accelerate metal oxidation by producing acidic metabolites or facilitating electrochemical processes, thereby causing damage to the material. Conversely, under specific conditions, they can form biofilms and/or biominerals that create protective layers, reducing the oxidation rate and delaying corrosion. This paper provides a comprehensive illustration of microbial corrosion promotion and inhibition, emphasizing the importance of key microorganisms involved in these corrosive processes. Microorganisms, including sulfate-reducing bacteria, nitrate-reducing bacteria, iron-oxidizing and iron-reducing bacteria and certain fungi, contribute to corrosion through their metabolic activities. Microbial corrosion mechanisms can be classified into extracellular electron transfer, microbial metabolism corrosion and the oxygen concentration cell theory. In contrast, microorganisms can effectively mitigate metal corrosion through a range of mechanisms including reduction of dissolved oxygen levels, secretion of antimicrobial substances, biological competition and biomineralization. Microbial corrosion and inhibition generally arise from multiple mechanisms working together, rather than a single cause. A deeper understanding of these mechanisms can provide a theoretical basis and practical guidance for the development of new anti-corrosion strategies.

ИСПОЛЬЗОВАНИЕ БИОРАЗЛАГАЕМЫХ МАТЕРИАЛОВ ДЛЯ ЗАЩИТЫ СЕЛЬСКОХОЗЯЙСТВЕННОЙ ТЕХНИКИ ОТ КОРРОЗИИ

The choice of the type of protective agent against corrosion of agricultural machinery parts is determined primarily by the safety of the protected surfaces during non-working periods and environmental safety when protective agents come into contact with them as a result of their operation: soil cultivation, sowing, planting, harvesting of agricultural crops, etc. Many anti-corrosion protection agents are known: restoration of initial paint and varnish coatings, use of temporary protective compounds (bitumen, oils, rust converters and corrosion inhibitors, in rare cases, PVC lubricants, inhibited compounds NG-204, NG-203, “Kormin”, water-wax compounds, etc. are used). The listed means have a number of disadvantages: high cost, high labor intensity of application and depreservation of protective, as well as negative environmental consequences. In connection with the above, the purpose of the work is to determine the anti-corrosion properties of rendered animal fats as relatively inexpensive and environmentally friendly materials. To achieve this goal, studies were carried out using samples of steel St.3, coated with rendered beef, horse and pork fats. The studied samples were pre-weighed, coated with the appropriate fats and placed under a canopy from November 2019 to September 2020. It should be noted that the preservation of the fat film depends on its thickness and weather and climatic conditions. During the observations, the preservation and condition of the coatings were monitored monthly, the mass of the samples was determined, and the moments of corrosion occurrence were recorded during daily inspection. The measurements showed the development of corrosion processes at negative temperatures (-4…-5°C) and relative air humidity within 75…85%. It should be noted that external manifestations of corrosion have been observed on unprotected samples since March. Samples with beef fat films show a threefold decrease in the corrosion rate compared to unprotected ones. No corrosion was observed on samples with pork and horse fat coatings.

Investigation of water treatment residues as corrosion inhibitors in acidic environment

The present research focuses on the valorization of residues from the treatment of colored wastewater as eco-friendly corrosion inhibitors for mild steel in a 1 M HCl medium. These residues are derived from Aleppo pine fibers treated with Maxilon Blue dye (RFPABM) and Eriochrome Black dye (RFPANE). The study evaluated their corrosion inhibition performance using weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Furthermore, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM–EDX) was employed to analyze the surface morphology of the mild steel samples. The results demonstrated significant inhibition efficiencies of 84.3% for crude Aleppo pine fiber extract (FPA), 90.5% for RFPABM, and 90.1% for RFPANE at an optimal concentration of 1 g/L. The polarization studies identified these extracts as mixed-type inhibitors, effectively reducing both anodic and cathodic reactions. EIS analysis revealed a decrease in double-layer capacitance (Cdl) with increasing inhibitor concentration, indicating robust adsorption of the inhibitors on the steel surface and the formation of a protective barrier. Adsorption isotherm analysis showed that the adsorption of FPA and RFPABM on the mild steel surface follows both Langmuir and Temkin models, suggesting monolayer adsorption with possible lateral interactions between adsorbed molecules. In contrast, RFPANE strictly adhered to the Langmuir model, indicating uniform adsorption sites without significant interactions between adsorbed molecules. SEM–EDX analysis corroborated these findings by revealing smoother and less corroded surfaces in the presence of inhibitors compared to the uninhibited sample, which exhibited severe degradation. The protective film formed by the inhibitors was rich in oxygen and carbon, confirming the presence of adsorbed organic compounds from the extracts.

Schiff Bases as Effective and Sustainable Corrosion Inhibitors

Schiff bases are effective corrosion inhibitors for metals like mild steel, copper, and aluminum, offering high efficiency, adaptability, environmental stability, and cost-effectiveness. This study examines how substituents and molecular structures influence their corrosion-suppressing capabilities. It also analyzes the effects of metals and environmental factors such as temperature and pH on their performance. The relationship between inhibition efficiency and Schiff base concentration is explored to provide insight into their protective mechanisms. Industrial applications are discussed, particularly in coatings, mechanical engineering, and the oil and gas sectors. A key focus is on integrating nanotechnology into Schiff bases to enhance their protective properties. Innovations like nanoscale surface treatments, controlled release via nanocapsules, and nanocomposite coatings are highlighted as promising advances for next-generation corrosion prevention. The study emphasizes the need for future research into environmentally sustainable Schiff bases, novel derivatives with enhanced characteristics, and extensive industrial testing. The integration of nanotechnology is identified as a critical area for development, potentially leading to more effective and durable corrosion prevention solutions. These advancements position Schiff bases as a versatile and sustainable choice for industrial corrosion control.

Exploration of sodium dodecyl sulfate as a corrosion inhibitor for grey cast iron in phosphoric acid: effects of temperature and surface composition

Exploration of sodium dodecyl sulfate as a corrosion inhibitor for grey cast iron in phosphoric acid: effects of temperature and surface composition

Impact of NaHCO3/Na2CO3 Buffer Reagent on Mitigating the Corrosion of C110 Steel in Water-Based Annulus Protection Fluid at Ultrahigh Temperature

The drilling of ultradeep oil wells brings many challenges to the downhole tubular materials, where corrosion induced by halide annulus protection fluid is one major problem. In this work, the Na2CO3/NaHCO3 buffer system is employed to mitigate the corrosion of C110 steel in NaBr annulus protection fluid at 220 °C. Weight loss tests, corrosion morphologies characterizations, and electrochemical measurements were used to investigate the inhibition effect. X-ray diffraction and X-ray photo-electron spectroscopy were employed to analyze the surface phase compositions. It is found that the Na2CO3/NaHCO3 buffer reagents effectively inhibit the corrosion of C110 steel, and the inhibition efficiency can reach 96.1%. The higher pH leads to the better inhibition performance, and, particularly, the buffer system is more effective in the corrosion environment of greater aggressivity. Without buffer reagents, the steel substrate is subjected to higher degree of uniform etching and pitting corrosion due to the formation of loose and porous corrosion products. In contrast, the addition of buffer reagents facilitates the formation of thinner but denser and more protective Fe3O4 passive film, contributing the high corrosion inhibition efficiency. Our work paves the way for the safe service of NaBr annulus protection fluid at 220 °C in ultradeep oil wells.

Novel eco-friendly glass synthesis as corrosion inhibitors for copper in sulfuric acid medium

PurposeThis study aims to examine the potential of three novel inorganic compounds, namely, Bi4 B2 O9, Bi2.4 B1.2 Ba0.4 O5.8 and Bi0.8 B0.4 Ba0.8 O2.6, as sustainable and environmentally friendly inhibitors for the mitigation of copper corrosion in a corrosive environment containing 0.5 M H2SO4. The objective of this study was to investigate the inhibitory effect of inorganic products with low concentrations and the impact of surface roughness generated by corrosion on copper, with the aim of improving its corrosion resistance.Design/methodology/approachIn the present study, we tested bismuth-borate glasses as inorganic inhibitors. These glasses were prepared by the conventional melt-quenching method. To assess the inhibition processes, a number of techniques were used, including potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) to study corrosion resistance, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and atomic force microscopy (AFM) to examine the microstructure of the copper surface.FindingsThe findings show that the three inhibitors studied have higher inhibition efficiencies at the optimum concentration (10–3 M), reaching 90.1% for Bi4 B2 O9, 90.5% for Bi2.4 B1.2 Ba0.4 O5.8 and 90.8% for Bi0.8 B0.4 Ba0.8 O2.6. Furthermore, the results suggest that the three products behave as mixed-type inhibitors. Tests using XRD, FT-IR, SEM/EDS and AFM revealed that the addition of the inhibitors to the acid solution significantly delayed the formation of Cu2O oxides. This led to the formation of a protective barrier that reduced damage to the copper metal surface, resulting in a smoother surface morphology.Originality/valueThe objective of this study was to investigate the efficacy of new inorganic corrosion inhibitors in preventing copper corrosion in an acidic solution containing H2SO4. Our research stands out by employing advanced techniques such as Potentiodynamic Polarization (PDP), Electrochemical Impedance Spectroscopy (EIS), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM/EDS) and Atomic Force Microscopy (AFM) for a comprehensive analysis. The results demonstrate that the three inhibitors are highly effective in preventing copper corrosion. Additionally, this study provides novel insights into the varying impacts of these inhibitors on corrosion protection, highlighting their potential as environmentally friendly alternatives to traditional inhibitors such as organic inhibitors.