Eco-friendly Corrosion Inhibitor Research Articles

Evaluation of Punica granatum extract as an environmentally safe corrosion inhibitor for carbon steel in a solution of 1 M sulfuric acid

In order to create an eco-friendly corrosion inhibitor Punica granatum extract (PG) was employed as the primary component for use in H2SO4 pickling procedures. The inhibition behaviour of C-steel in H2SO4 has been studied using weightloss tests, polarization curves, electrochemical impedance spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS).The outcomes demonstrate the extract's effective inhibition in 1 M H2SO4. Both an increase in concentration and temperature boosted the effectiveness of the inhibition. With the greater concentration of PG (300 ppm) and the higher applied temperature (45C), the inhibition effectiveness reached 91.7%. Nevertheless, the inhibitory efficacy increased synergistically with the addition of potassium iodide, increasing from 81.5% to 95.0% at 25C using the weight-loss technique. Adsorption on the C-steel caused the inhibitory effect, and this adsorption mechanism was compatible with the Temkin isotherm. According to the free energy of adsorption (ΔGo ads = 39.5 kJ/mol.), the PG extract adheres chemically to the surface of the C-steel. The efficient inhibitor Punica granatum (PG) extract may prevent corrosion of C-steel in H2SO4 solution.The extracts from Punica granatum (PG) are a commonly used green inhibitor that may be used to pickle metals.

Eco-friendly corrosion inhibitor for mild steel in acidic media

Eco-friendly corrosion inhibitor for mild steel in acidic media

Adsorption and corrosion inhibition performance of rice bran extract on carbon steel in aqueous chloride solution: Experimental, computational and theoretical studies

In this study, an ecofriendly corrosion inhibitor made of waste rice bran was produced to reduce corrosion caused by chloride on reinforcement. Electrochemical results revealed that with increasing inhibitor concentration the inhibition efficiency of the rice bran extract (RBE) reached the maximum value of 98% at an optimum concentration of 4.5%. The existence of carbonaceous passive film over the steel surface was established by X-ray photoelectron spectroscopy (XPS). Quantum mechanics and Molecular simulations evidenced the adsorption of phytochemicals onto the steel surface thus, affirming the inhibition action of the rice bran extract.

Recycling of Expired Lactulose Drugs as Eco-Friendly Corrosion Inhibitor for Steel Alloys in Acidic Environment: Gravimetrical and Electrochemical Studies

Recycling of Expired Lactulose Drugs as Eco-Friendly Corrosion Inhibitor for Steel Alloys in Acidic Environment: Gravimetrical and Electrochemical Studies

Exploration of novel polyaspartic acid derivatives as fluorescent eco-friendly corrosion inhibitors for the carbon steel: Electrochemical, surface analysis (SEM/XPS) and theoretical calculation

The addition of corrosion inhibitors can effectively improve the hazards posed by the corrosion of carbon steel in circulating cooling water. From the economic and environmental perspective, it makes sense to develop eco-friendly corrosion inhibitors that can be monitored online. In the present work, three polyaspartic acid (PASP) derivatives modified with benzothiazole compounds (R-ABT: R=H, Me and OMe) were synthesized as fluorescent green corrosion inhibitors for the first time, which have good thermostability and allow online detection by fluorescence spectroscopy. The corrosion performance of three inhibitors on carbon steel in cooling water was investigated using the electrochemical test, weight loss measurement, scanning electron microscopy, atomic force microscopy, contact angle test, X-ray photoelectron spectroscopy, density functional theory (DFT) and molecular dynamic (MD) simulation. The electrochemical tests indicate that all three derivatives are mixed-type inhibitors and their corrosion inhibition capacity is ranked as follows: PASP-OMe-ABT (96.45%) > PASP-Me-ABT (91.38%) > PASP-H-ABT (89.38%). The three inhibitor molecules improve the carbon steel surface by physisorption and chemisorption as shown by weight loss tests and surface analysis. XPS analysis further confirms the presence of a compound film on the metal surface. Meanwhile, the difference in the radial distribution function and diffusion coefficient of the three derivatives on the Fe (110) surface was also in-depth revealed by quantum chemical calculation based on DFT and MD simulation. The theoretical data obtained strongly support the experimental results and confirm that the introduction of methoxy enhances the corrosion inhibition performance.

Rosmarinus officinalis extract as eco-friendly corrosion inhibitor for copper in 1 M nitric acid solution: Experimental and theoretical studies

Rosmarinus officinalis extract (ROE) was studied chemically (mass loss, ML), electrochemically impedance spectrometry (EIS), and potentiodynamic polarization (PDP) as a corrosion inhibitor in 1 M nitric acid. According to ML, ROE is effective like a copper preservative in 1 M HNO3 acid solution at R.T by improving inhibitor concentration up to 77 % at 300 ppm and 25 °C. A study was conducted regarding the effect of temperature on copper adsorption, as well as the calculation of adsorption coefficients. Results indicated that physisorption increases with temperature, indicating a decrease in inhibition efficiency (%IE). Langmuir's adsorption model was consistent with the adsorption mechanism. Using the PDP method, the inhibitor accumulated on the copper surface in mixed forms. Moreover, EIS revealed that the value of double-layer capacitance dropped with an increased dose of ROE, while the charge transfer resistance improved. A different approach was taken to the examination of surfaces. Both theoretical studies and practical results were calculated and compared to demonstrate that the results were valid.

Synthesis of new guanidine benzothiazole derivative and its application as Eco-friendly corrosion inhibitor

Synthesis of new guanidine benzothiazole derivative and its application as Eco-friendly corrosion inhibitor

KI effects on corrosion inhibition for 1018 steel in acid media using Medicago sativa.

Medicago sativa (M. sativa) extract is a safe and eco-friendly corrosion inhibitor of 1018 steel in acid media. The inhibitor reached a maximum efficiency of 85% by using 500ppm. In this work, we study the use of KI as an add-on to increase the inhibition efficiency of M. sativa, as well as making the natural inhibitor competitive with the commercial ones. We evaluated the effect of halide ions through the variation of different concentrations of KI and its synergy with the extract of M. sativa as a corrosion inhibitor of carbon steel in 0.5M sulfuric acid and at different temperatures. The results were obtained through electrochemical techniques such as electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP) curves, and weight loss gravimetric technique. It was found that halide ions increase the inhibition efficiency of M. sativa from 85 to 95% when 5mM concentration of KI was used. The efficiency of the inhibition increases proportionally with the immersion time but reduces when the temperature increases. The addition of iodide ions (I-) revealed that it exerts a synergistic effect on the inhibition of corrosion with the extract of M. sativa. However, when studying the metal surface using a scanning electron microscope, pitting corrosion was found.

Rust Conversion of Proanthocyanidins to Archaeological Steel: A Case Study of Lingzhao Xuan in the Forbidden City.

This work was focused on the rust conversion of proanthocyanidins (PC) for goethite (α-FeOOH), akaganeite (β-FeOOH) and lepidocrocite (γ-FeOOH), trying to show the potential of PC as an eco-friendly corrosion inhibitor and rust converter for archaeological steel conservation. The experiment used a rusted steel screw from Lingzhao Xuan of the Forbidden City in the Qing Dynasty and three kinds of pure iron oxyhydroxides as research samples. By means of micro-Raman, FTIR, XRD, XPS, SEM and EIS, PC had the ability to chemically react with iron oxyhydroxides in the rust, forming amorphous PC-FeOOH with a marked signal about 1384 cm-1 as phenolic-Fe in infrared properties. The original relatively stable iron oxides were not induced to phase transformation and still remained. The converted rust layer could be more stable in the corrosive medium and increased the corrosion potential more effectively. Both the rust layer resistance and the charge transfer resistance of the archaeological samples were improved by at least 3 times with 5.0 g/L of PC, which could reasonably stabilize the archaeological rust and hindered external corrosive penetration into the core. It was a mild protection material that showed satisfactory performance for archaeological steel cultural heritage and has a good application prospect.

Computational Foretelling and Experimental Implementation of the Performance of Polyacrylic Acid and Polyacrylamide Polymers as Eco-Friendly Corrosion Inhibitors for Copper in Nitric Acid.

Copper is primarily used in many industrial processes, but like many other metals, it suffers from corrosion damage. Polymers are not only one of the effective corrosion inhibitors but also are environmentally friendly agents in doing so. Hence, in this paper, the efficacy of two polyelectrolyte polymers, namely poly(acrylic acid) (PAA) and polyacrylamide (PAM), as corrosion inhibitors for copper in molar nitric acid medium was explored. Chemical, electrochemical, and microscopic tools were employed in this investigation. The weight-loss study revealed that the computed inhibition efficiencies (% IEs) of both PAA and PAM increased with their concentrations but diminished with increasing HNO3 concentration and temperature. The results revealed that, at similar concentrations, the values of % IEs of PAM are slightly higher than those recorded for PAA, where these values at 298 K reached 88% and 84% in the presence of a 250 mg/L of PAM and PAA, respectively. The prominent IE% values for the tested polymers are due to their strong adsorption on the Cu surface and follow the Langmuir adsorption isoform. Thermodynamic and kinetic parameters were also calculated and discussed. The kinetics of corrosion inhibition by PAA and PAM showed a negative first-order process. The results showed also that the used polymers played as mixed-kind inhibitors with anodic priority. The mechanisms of copper corrosion in nitric acid medium and its inhibition by the tested polymers were discussed. DFT calculations and molecular dynamic (MD) modelling were used to investigate the effect of PAA and PAM molecular configuration on their anti-corrosion behavior. The results indicated that the experimental and computational study are highly consistent.

An eco-friendly corrosion inhibitor Cuscuta reflexa extract and PEG400 for mild steel inhibition in acidic medium: computational and experimental investigations.

Herein, the mechanism of corrosion prevention of mild steel (MS) by extract of Cuscuta reflexa/Amarbel (AME) as green inhibitor is explained by gravitational, electrochemical measurements. The viability of neat extract and after adding an intensifier was investigated as corrosion inhibitor for MS in hydrochloric acid. The presence of electron-rich moieties in AME was characterized through Fourier-transform infrared spectroscopy (FTIR). Furthermore, polarization measurements showed that AME acted as a mixed type inhibitor against corrosion. The formulation of 100ppm AME with 50ppm polyethylene glycol 400 (PEG400) as an intensifier showed inhibition efficiency of 97.51% for MS in 0.5M HCl. The protection of MS in (AME + PEG) formulation was also assessed through the Langmuir, Freundlich, and Flory-Huggins adsorption isotherm model. The surface studies of the MS were examined by atomic force microscopy (AFM) and scanning electron microscopy (SEM) that indicated a smoothened surface of the metal in the presence of the studied compounds. XPS study was executed to analyze the interaction of the inhibitor with the metal surface. In addition, computational quantum study provides the molecular structural relationship with corrosion inhibitive competence of the extract.

Novel thiophene derivatives as eco-friendly corrosion inhibitors for mild steel in 1 M HCl solution: Characterization, electrochemical and computational (DFT and MC simulations) methods

Two novel organic aromatic thiophene derivatives, 5-(thiophen-2-yl)− 1 H-tetrazole (TET) and thiophene-2-carbaldehyde oxime (OXM) were investigated for their anticorrosion properties on the mild steel (M-S) in a 1 M HCl media. The two organic inhibitors have significant resistance to the effect of time of immersion, for example, the effectiveness of the molecule TET increases with the increase in time until 12 h and the molecule OXM effectiveness remains almost stable. The adsorption mechanism of OXM and TET was evaluated by electrochemical measurements (polarization and impedance spectroscopy), ultraviolet-visible spectrophotometry (UV–Vis), scanning electron microscopy (SEM) joint with energy dispersive analysis of X-rays (EDAX). The effectiveness of these molecules was significantly influenced by temperature, immersed time, and concentration [10−6 M − 10−3 M], reaching a maximum of 94 %, and 95 % for OXM and TET, respectively, at 10−3 M. In addition, the maximum shift in Ecorr values is 10–17 mV, which implies that the investigated thiophene compounds are mixed-type (anodic/cathodic) inhibitors. SEM micrographs confirmed the formation of a protective layer adsorbed on the M-S surface. The Electrophilic/nucleophilic attacks (Fukui indices) on M-S are theoretically determined. Strong consistency of findings obtained by computational (DFT and MC simulations) and electrochemical tests were demonstrated.

Eupatorium Adenophora (Spreng.) leaves Extract as a Highly Efficient Eco-friendly Inhibitor for Steel Corrosion in trichloroacetic acid Solution

Eupatorium Adenophora (Spreng.) leaves Extract as a Highly Efficient Eco-friendly Inhibitor for Steel Corrosion in trichloroacetic acid Solution

Medicinal Materials as Eco-friendly Corrosion Inhibitors for Industrial Applications: A Review

Medicinal Materials as Eco-friendly Corrosion Inhibitors for Industrial Applications: A Review

Silver nanoparticles – Expired medicinal drugs waste accumulated at hail city for the local manufacturing of green corrosion inhibitor system for steel in acidic environment

The aim of the present study is to avoid the accumulation of expired drugs and chemicals in Hail City Saudi Arabia by using it for the manufacturing of eco-friendly corrosion inhibitors as a local product for the Hail area. The current study looks at Ag nanoparticles' green synthesis, characterization, and inhibitory properties. Silver nitrate (AgNO3) was used as a precursor, sodium citrate as a reducing agent, and polyvinyl alcohol (PVA) as a stabilizer in the chemical reduction procedure. The effect of adding expired Baclofen drug (EMBD) collected from the Hail area to the nanoparticles was investigated. The addition of PVA and expired pharmaceuticals to the nanoparticles increased the corrosion inhibition of steel. The researchers looked at the effects of nanoparticle concentrations, reaction temperature, and mixing nanomaterials with medications. With rising nanoparticle concentrations, expired drug concentrations, and reaction temperature, corrosion inhibition was observed to rise. The inhibition is caused by nanoparticle adsorption on steel surfaces that follow the Langmuir Isotherm. The addition of EMBD to nanomaterials improved their inhibitory performance, which was found to be (Nano2- EMBD) > (Nano1- EMBD) > (Nano2) > (Nano1) > (EMBD), in that order. Nanomaterials are promoted by the expiring medication meaning that, the synergistic effect happens between nanomaterials and drug systems. The results of potentiodynamic polarization as electrochemical measurements show that the inhibitor system (Nano2- EMBD) acts as a mixed-type. Electrochemical impedance spectroscopy (EIS) data show that the inhibitor system improves polarization resistance and inhibition performance by adhering to the metal/electrolyte interface.

Euphorbia prostrata as an eco-friendly corrosion inhibitor for steel: electrochemical and DFT studies

Euphorbia prostrata as an eco-friendly corrosion inhibitor for steel: electrochemical and DFT studies

Insight into the anti-corrosion performance of Acanthopanax senticosus leaf extract as eco-friendly corrosion inhibitor for carbon steel in acidic medium

In this work, the extract of acanthopanax senticosus leaf (ASLE), prepared using one-step pure water extraction method, is firstly utilized as a sustainable eco-friendly corrosion inhibitor for carbon steel in acidic solutions. The corrosion inhibition efficiency is evaluated by weight loss method and electrochemical tests, including electrochemical impedance spectroscopy and potentiodynamic polarization curve. The compositions of ASLE are analyzed using Fourier transform infrared spectroscopy, components and microstructures of corrosion products are characterized by scanning electron microscopy and X-ray photoelectron spectroscopy. Results indicate that ASLE is successfully prepared using the clean production process, and it can act as an efficient mixed-type corrosion inhibitor for Q235 carbon steel in 1 mol/L HCl. The maximum corrosion inhibition efficiency can reach 98.79 % after 144 h immersion with the addition of 150 mg/L. ASLE also displays the superior long-term corrosion inhibition performance. The protective hydrophobic adsorption film can effectively retard the invasion of aggressive ions and inhibit the corrosion of carbon steel in acidic service occasions.

Synthesis and evaluation of omeprazole-based derivatives as eco-friendly corrosion inhibitors for Q235 steel in hydrochloric acid

The application of expired drugs as corrosion inhibitors is a low-cost, cost-effective and environment-friendly alternative to the expensive degradation process. Against this background, the corrosion inhibition performance and mechanism of imidazole drugs omeprazole (OMP) and its by-products omeprazole sulfide (OMP-1) and omeprazole sulfonate (OMP-2) on Q235 steel in 1 M HCl is investigated by weight loss experiment, electrochemical technology, surface analysis methods (SEM and XPS), quantum chemical calculation and molecular dynamics simulation. The results demonstrate that OMP, OMP-1 and OMP-2 are effective corrosion inhibitors for Q235 steel in 1 M HCl. The inhibition efficiency above 95% is achievable at 298 K with 0.2 mM inhibitor concentration. The test results and fitting data show that they are mixed-type corrosion inhibitors, which comply with Langmuir adsorption isotherm. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) further confirmed these three inhibitor molecules playing the role of corrosion inhibition by adsorbing on the surface of Q235 steel to form a film barrier. The corrosion inhibition mechanism of omeprazole on metal surface is also discussed.

Adsorption Mechanism of Eco-Friendly Corrosion Inhibitors for Exceptional Corrosion Protection of Carbon Steel: Electrochemical and First-Principles DFT Evaluations

In the present work, we represent two thiazolidinediones, namely (Z)-5-(4-methoxybenzylidene) thiazolidine-2,4-dione (MeOTZD) and (Z)-5-(4-methylbenzylidene) thiazolidine-2,4-dione (MeTZD), as corrosion inhibitors for carbon steel (CS) in 1.0 M HCl solution. Techniques for gravimetric methods, electrochemical measurements, and morphological characterization were used to conduct experimental evaluations. Additionally, calculations based on the fundamental principles of Density Functional Theory (DFT) were employed to simulate inhibitor–iron interactions. Experimental results indicated that investigated inhibitors can significantly enhance the corrosion resistance of CS, reaching a performance of 95% and 87% at 5 × 10−3 mol/L of MeOTZ and MeTZD, respectively. According to gravimetric and electrochemical experiments, inhibitor molecules obstruct corrosion reactions by adhering to the CS surface, which follows the Langmuir isotherm model. On the other hand, the morphological analysis showed a well-distinguished difference between unprotected and protected CS surfaces as a result of the inhibitors’ addition to HCl. Projected density of states and interaction energies obtained from first-principles DFT simulations indicate that the studied molecules form covalent bonds with iron atoms through charge transfer.

Sunflower-head extract as a sustainable and eco-friendly corrosion inhibitor for carbon steel in hydrochloric acid and sulfuric acid solutions

The inhibition effect of sunflower head-extract (SFHE) for carbon steel in 1 M hydrochloric acid (HCl) and 0.5 M sulfuric acid (H2SO4) solution was studied by weight loss measurement, electrochemical measurements, and ultra-depth three-dimensional microscope. The adsorption/desorption of SFHE from carbon steel surface was studied by the differential polarization curves. The thermodynamic and kinetic parameters were also calculated and discussed. The results show that SFHE is an excellent inhibitor in 1 M HCl and 0.5 M H2SO4, the SFHE exhibits the highest inhibition efficiency of 96.4% and 91.9% at 3 g/L at 298 K in 1 M HCl and 0.5 M H2SO4, respectively. In addition, the inhibition efficiency follows the order: HCl ˃ H2SO4. The adsorption of SFHE on the carbon steel surface obeys the Langmuir adsorption isotherm. All the results reveal that SFHE can be used as a sustainable and environmentally friendly corrosion inhibitor for carbon steel in acid solution in the future.