Eco-friendly Corrosion Inhibitor Research Articles

Evaluation of Shazab extract as eco-friendly green corrosion inhibitor for 420 stainless steel in hydrochloric acid

The effect of dried Shazab leaf extract (DSLE) as a green, eco-friendly corrosion inhibitor for 420 stainless steel (420 SS) in 0.5 M HCl was evaluated using electrochemical impedance spectroscopy (EIS) and potentiodynamic Tafel polarisation (PTP). Four types of isotherm models were applied to calculate the equilibrium adsorption constant (Kads), and based on the value of the correlation coefficient (R2), the Langmuir isotherm was found to be the best in this study. Moreover, based on the different thermodynamic parameters such as Gads, Hads, and Ea, the adsorption of DSLE on 420 SS was considered to be a physisorption process, and the adsorption was proved using FTIR and UV-vis spectroscopy. The degree of pitting that appeared on the metal surface was investigated in different concentrations of HCl and examined using microscopic photographs. Finally, the inhibition mechanism was studied.

Electrochemical Studies of Bitter Gourd (Momordica charantia) fruits as Ecofriendly Corrosion Inhibitor for Mild Steel in 1 M HCl Solution

Electrochemical Studies of Bitter Gourd (Momordica charantia) fruits as Ecofriendly Corrosion Inhibitor for Mild Steel in 1 M HCl Solution

Data from Chemical, electrochemical and quantum chemical studies for interaction between Cephapirin drug as an eco-friendly corrosion inhibitor and carbon steel surface in acidic medium

The influence of Cephapirin drug on the corrosion of carbon steel (CS) in 2 M HCl solutions has been examined by mass loss (ML), and electrochemical methods. The results demonstrated that Cephapirin drug acts as good inhibitor for CS corrosion. The inhibition efficiency increased as the concentration of the drug increases. Potentiodynamic polarization (PDP) studies showed that Cephapirin is mixed-type inhibitor. The electrochemical impedance spectra (EIS) studies reveal that the process of inhibition is through charge transfer. The adsorption of the drug on metal surface obeyed Temkin adsorption isotherm. The surface analysis of the CS was investigated using Attenuated total reflectance spectroscopy (ATR-FTIR) and UV–visible reflectance spectroscopy. Surface analysis of CS confirmed the existence of a protective adsorbed film of the drug on the metal surface. The quantum chemical calculations of the drug molecule in aqueous phase were done using density functional theory (DFT) method and discussed to correlate the theoretical and experimental data. The inhibition efficiency of Cephapirin drug obtained by chemical and electrochemical methods was in good correlation with each other.

CORROSION INHIBITION PROPERTY OF EXPIRED FLUOXYMESTERONE DRUG ON THE ALUMINUM (AL) SURFACE IN 3 % NaCl SOLUTION

Objective: Aluminum (Al) corrosion in the NaCl solution is an example of dissolution in the neutral medium. The ongoing corrosion research efforts to produce the eco-friendly corrosion inhibitors to protect the aluminum metal from the corrosive solution.
 Methods: Herein, mass loss and atomic absorption spectroscopy (AAS) techniques were conducted to explain the adsorption property of expired Fluoxymesterone drug on the Al surface in the 3 % NaCl solution.
 Results: All results show that the expired Fluoxymesterone drug molecules generate a stable invisible layer through adsorption mechanism on the electrode surface. The corrosion inhibition behavior mainly depends on the concentration of the expired Fluoxymesterone drug and contact time at 313 K.
 Conclusion: The corrosion inhibition property is due to adsorption of electron-rich molecules on the Al surface in 3 % NaCl solution.

Experimental, theoretical and mathematical studies of Echium italicum L. extract as a corrosion inhibitor for carbon steel in acidic medium

Butanolic extract of Echium italicum L. (BEEI) was investigated as eco-friendly corrosion inhibitor for carbon steel (API 5L-X60) in 1 M hydrochloric acid solution using electrochemical, gravimetric and scanning electron microscopy methods. The effect of rising temperature was inspected and the apparent energies of the dissolution process were discussed. The BEEI behaved as mixed type inhibitor with the highest inhibition at 500 ppm. The adsorption of the inhibitor on the steel surface, follow Freundlich isotherm and its mod was found to be physisorption. The corrosion rate decreased with increase in the inhibitor concentration and rose with temperature. Additionally, quantum chemical parameters such as energy gap, EHOMO and ELUMO were calculated and used to predict the relationship for the adsorption mechanism. The obtained experimental data were in good agreement with those predicated by mathematical regression.

Myristic acid based imidazoline derivative as effective corrosion inhibitor for steel in 15% HCl medium

There is a high demand of effective and eco-friendly corrosion inhibitor for industrial applications. In an attempt to prepare a benign and effective corrosion inhibitor for acidizing purpose, an imidazoline derivative, N-(2-(2-tridecyl-4,5-dihydro-1H-imidazol-1-yl)ethyl)tetradecanamide (NTETD) was synthesized from myristic acid and diethyleneamine. The characterization of the newly synthesized compound was done using 1H NMR, FTIR, and elemental analysis techniques. NTETD was examined as a corrosion inhibitor for low carbon steel in 15% HCl solution using weight loss, electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), linear polarization (LPR), scanning electron microscope (SEM), energy dispersive spectroscopy (EDAX), atomic force spectroscopy (AFM), and X-ray photoelectron spectroscopy (XPS) techniques. It was found that, the optimum concentration of NTETD is 300 mg/L. With this concentration, inhibition efficiency above 93% is achievable. Results from PDP show that, NTETD acted as a mixed type corrosion inhibitor but with principal effect on cathodic corrosion half reactions. The calculated value of the adsorption-desorption equilibrium constant (1.015 × 103) reveals a strong bonding between NTETD molecules and the steel surface. The EDAX, FTIR, and XPS results confirm the adsorption of NTETD molecules on the steel surface. SEM and AFM results agree with experimental findings that NTETD is effective in corrosion mitigation of steel in 15% HCl solution. The possible corrosion inhibition mechanism by NTETD has been proposed.

Evaluation of Ficus tikoua leaves extract as an eco-friendly corrosion inhibitor for carbon steel in HCl media

An effective and biodegradable Ficus tikoua leaves extract was studied as a corrosion inhibitor for carbon steel in hydrochloric acid. Systematic electrochemical experiments and morphological characterization were carried out to investigate the properties of the corrosion inhibitor. Meanwhile, quantum chemical calculations were performed to aid further understanding of the electrochemical mechanism. The electrochemical results reveal that the extract inhibitors act as a mixed-type with an inhibition efficiency up to 95.8% at 298 K. Moreover, this extract shows good inhibory activity at a wide range of temperatures and the corresponding results were further confirmed by morphological analysis. The chemical formulae of these major components are fully optimized in the DFT with B3LYP in the gas phase and the base set is 6-311++G (d, p).

Highly efficient eco-friendly corrosion inhibitor for mild steel in 5\u2009M HCl at elevated temperatures: experimental & molecular dynamics study

Laurhydrazide N′-propan-3-one was used as an eco-friendly inhibitor for the corrosion of mild steel in 5 M HCl at elevated temperatures. Various electrochemical techniques and surface characterization methods were utilized in this study. In addition, the kinetics and thermodynamic parameters were calculated and discussed. Furthermore, a geometry optimization of LHP was performed and the time-dependent density functional theory was utilized to calculate the electronic absorption spectra. Finally, frequency calculations were, also, performed on the optimized geometry.

Effect of Corrosion on Crude Oil and Natural Gas Pipeline with Emphasis on Prevention by Ecofriendly Corrosion Inhibitors: A Comprehensive Review

This paper focuses on the problems faced by oil and gas industries due to corrosion during refining and its transportation and to overcome with this problem by use of appropriate inhibitor. Different sources of energy requires transmission from one area to another and this should be efficient, effective and for this we use pipelines which are made of different metallic equipments which generally faces problem of corrosion. The mechanism of corrosion, its different types encountered in oil and gas industries are mentioned. Impact of corrosion on economics such as capital cost, design cost, control cost and associated cost are illustrated. Different types of physiochemical parameters that are responsible for initiation and acceleration of corrosion are discussed. Various techniques used for determination of corrosion rate and concept of corrosion allowance is discussed. This paper describes corrosion inhibitors, types of inhibitors and their selection criteria. This paper gives brief review of various types of eco-friendly inhibitors such as different types of amino acids, various classes of drugs, rare earth materials such as lanthanides. Their advantages and limitations are also discussed.

Eco-friendly corrosion inhibitors based on Cashew nut shell liquid (CNSL) for acidizing fluids

The acidic fluids used in the acidification of oil wells can compromise metallic structures. As a consequence, corrosion inhibitors are needed to mitigate the corrosion process. Researches have been carried out on the use of eco-friendly corrosion inhibitors, which are obtained from low cost and sustainable source. In this work, Cashew nut shell liquid (CNSL), a by-product of the cashew nut industry, and the residue of its distillation (R) were evaluated as corrosion inhibitors for API P110 carbon steel in 15% HCl. The efficacy of eight organic formulations was assessed by mass loss, potentiodynamic polarization, linear polarization resistance and electrochemical impedance. CNSL and R were characterized by FTIR, 1H NMR and TGA. The mass loss tests (298–353 K) revealed maximum efficiency of 99.47%, which was confirmed by electrochemical measurements. The formulations acted as mixed inhibitors. Molecular adsorption probably occurs through the oxygens and π electrons of the aromatic rings in agreement with DFT results. The formation of an inhibitor film was confirmed by SEM-EDX and FTIR. This study reveals the importance of sustainable assets, such as cashew nut residues, that when properly purified and formulated may exhibit high corrosion inhibition efficiency, even under aggressive conditions found in the offshore oil and gas industry. In addition, it represents a more noble application for a by-product in terms of value aggregation.

A novel eco-friendly vapor phase corrosion inhibitor of mild steel

PurposeThis paper aims to investigate the efficacy of grape pomace extract (GPE) as an eco-friendly vapor phase green inhibitor for corrosion of steel and assess the effect of the major compounds of extract on the inhibition efficiency.Design/methodology/approachThe present study was carried out to identify the components present in the 2-propanol GPE by gas chromatography–mass spectrometry (GC-MS) analysis. Gravimetric, electrochemical impedance spectroscopy, potentiodynamic polarization, scanning electron microscopy and FTIR techniques were used to study the corrosion inhibitive.FindingsGPE has inhibited mild steel corrosion in conditions of periodic condensation of moisture. The gravimetric measurement indicates that inhibition efficiency shows direct proportional relation with concentration of inhibitor. The GPE and main components acted as a mixed-type inhibitor with predominant cathodic effectiveness. Research limitations/implications. Because of the presence of large number of compounds in the extract, it becomes difficult to understand the most active compound responsible for inhibition. However, from gas chromatography, mass spectrometry and quantum data, the assumption has been made that the major compound of GPE is responsible for the inhibition activity.Practical implicationsThe extract can be used in the temporary corrosion protection and is designed to prevent the corrosion of metal surfaces of equipment during transportation and storage.Originality/valueGPE can be used as a potential source of ecofriendly corrosion inhibitor for steel corrosion.

AEO7 Surfactant as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in HCl solution

The impact of AEO7 surfactant on the corrosion inhibition of carbon steel (C-steel) in 0.5 M HCl solution at temperatures between 20 °C and 50 °C was elucidated using weight loss and different electrochemical techniques. The kinetics and thermodynamic parameters of the corrosion and inhibition processes were reported. The corrosion inhibition efficiency (IE%) improved as the concentration of AEO7 increased. In addition, a synergistic effect was observed when a concentration of 1 × 10−3 mol L−1 or higher of potassium iodide (KI) was added to 40 µmol L−1 of the AEO7 inhibitor where the corrosion IE% increased from 87.4% to 99.2%. Also, it was found that the adsorption of AEO7 surfactant on C-steel surface followed the Freundlich isotherm. Furthermore, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements indicated that AEO7 was physically adsorbed on the steel surface. The surface topography was examined using an optical profilometer, an atomic force microscope (AFM), and a scanning electron-microscope (SEM) coupled with an energy dispersion X-ray (EDX) unit. Quantum chemical calculations based on the density functional theory were performed to understand the relationship between the corrosion IE% and the molecular structure of the AEO7 molecule.

Retracted: Development of Ecofriendly Corrosion Inhibitors for Application in Acidization of Petroleum Oil Well

Retracted: Development of Ecofriendly Corrosion Inhibitors for Application in Acidization of Petroleum Oil Well

Adsorption and inhibitive properties of Apigenin derivatives as eco-friendly corrosion inhibitors for brass in nitric acid solution

Six apigenin derivatives were synthesized through Mannich reaction by using apigenin isolated from Hypericum perforatum as raw material. The inhibition performance of these apigenin derivatives were investigated as eco-friendly corrosion inhibitors for brass in 1.0 M HNO3 solution by means of weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) measurements. The obtained results show that the as-synthesized apigenin derivatives act as efficient inhibitors for brass in 1.0 M HNO3. The inhibition efficiency increased with the increase in inhibitor concentration but decreased with a rise in temperature. The inhibition efficiency higher than 90% for these compounds was found even at a low concentration of 30 mg L−1, which is superior to the commonly used synthetic organic corrosion inhibitors for brass in acidic media. Electrochemical studies indicate that the inhibitors are of mixed type but predominantly cathodic in HNO3 solution. The inhibitor performance depends on the adsorption of the molecules on the metal surface. The thermodynamic parameters for inhibiting process were calculated according to the statistical model. The calculated thermodynamic parameters revealed that the adsorption of these inhibitors on brass surface was spontaneous, controlled by physiochemical processes. The adsorption behaviour of these apigenin derivatives on the surface of brass was analyzed utilizing SEM, AFM, XPS, and Raman spectroscopy measurements. The results confirmed that the apigenin derivatives prevented corrosion of brass by forming protective layer on its surface.

Studies of the anticorrosive nature of green Ricinus seed extract with neem biodiesel in copper metal

Ricinus communis seed extract was studied as a corrosion inhibitor for copper in neem oil-based biodiesel. Inhibition efficiency and corrosion rate were studied at different acid values and temperatures. The inhibition efficiency was found to be above 95% for copper in neem oil-based biodiesel. The negative values obtained for free energy of adsorption and heat of adsorption show the spontaneity of adsorption of inhibitors on the metal surface. Infrared spectral studies were shown to identify the functional groups responsible for corrosion inhibition. The surface morphology of copper metal was studied by scanning electron microscopy. All the results obtained were promising and, hence, a new alternative, eco-friendly corrosion inhibitor for copper corrosion in biodiesel is revealed.

4-(Pyridin-4-yl)thiazol-2-amine as an efficient non-toxic inhibitor for mild steel in hydrochloric acid solutions.

A novel eco-friendly corrosion inhibitor, namely, 4-(pyridin-4-yl)thiazol-2-amine (PTA), was synthesized and evaluated as a corrosion inhibitor for mild steel in 1 M HCl solution. Its inhibition effect against mild steel corrosion was investigated via weight loss methods, electrochemical measurements, and surface analyses. The experimental results showed that PTA is an effective corrosion inhibitor for mild steel in an acid medium, and the maximum inhibition efficiency reached 96.06% at 0.2 mM concentration. Polarization studies showed that PTA acted as a mixed inhibitor. The sorption behavior on the steel surface complies with the Langmuir adsorption isotherm, exhibiting both physisorption and chemisorption. The constitution and characteristic of the protective layer on the steel surface were verified using scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX) and UV-Vis spectroscopy. Quantum chemistry calculations were used to study the relationship between the inhibition efficiency and molecular structure of the inhibitor.

An investigation on the corrosion behavior of the epoxy coating embedded with mesoporous silica nanocontainer loaded by sulfamethazine inhibitor

In this study, mesoporous silica served as the host for an eco-friendly corrosion inhibitor. This material could adsorb and release corrosion inhibitor in different aqueous media. A composite coating was prepared by embedding 1 wt. % mesoporous silica loaded with sulfamethazine (MSInh) as the corrosion inhibitor into the epoxy film to protect mild steel as substrate. Anti-corrosion properties of the solution containing MSInh and corrosion protection function of composite coating were assessed by electrochemical impedance spectroscopy. Results showed the higher corrosion protection of epoxy/mesoporous silica loaded with inhibitor (MSInh) in NaCl solution for one month of immersion in comparison with epoxy/mesoporous silica and epoxy coatings. Charge transfer resistance of epoxy, epoxy/MS, and epoxy/MSInh after 30 days of immersion estimated 6, 15, and 80 kΩ cm2, respectively. The results revealed the higher corrosion resistance of epoxy/MSInh which confirmed the barrier effect of mesoporous silica against corrosive species and corrosion inhibiting effect of the released sulfamethazine molecules.

Graphene oxide as a pH-sensitive carrier for targeted delivery of eco-friendly corrosion inhibitors in chloride solution: Experimental and theroretical investigations

Graphene oxide (GO) was used as a smart pH-sensitive carrier for delivery of green corrosion inhibitors to the active corrosion sites of metal. Results demonstrated the physisorption and chemisorption of cerium onto the GO surface. The open circuit potential, polarization test and electrochemical impedance spectroscopy measurements as well as field-emission scanning electron microscopy and energy dispersive spectroscopy were used to study the corrosion inhibition power of GO–Ce system. Results revealed that as a result of cerium oxide/hydroxide film generation on the cathodic regions, the corrosion of mild steel was remarkably inhibited in the chloride solution.

Application of green products for industrially important materials protection: An amusing anticorrosive behavior of tender arecanut husk (green color) extract at metal-test solution interface

The sustainable corrosion impediment of tactic central materials such as mild steel and copper is the subject of utmost importance in contemporary civilization due to their wide spread utility in industrial sectors. This part reports the outcome of chemical (weight loss) and electrochemical measurements on the inhibition of corrosion of mild steel and copper metals in both 0.5 M HCl and 0.5 M NaOH media. Weight loss measurements divulged that, corrosion protection efficiencies were enhanced with increment in the concentration of plant extracts which indicates that dissolution process was stifled; whilst a decrease was noticed with the rise of solution temperature at habitual acid and base concentration is plausible due to thermal agitation of plant extract constituents from the metal surfaces. The maximum protection efficiency observed with immersion period of one hour at 303 K. (93.750% for copper in acid medium, 90% for copper in alkali medium, 93.478% for MS in acid medium and 91.66% for MS in alkali medium). The probable inhibitive modality mechanism of most potent green inhibitor was further corroborated by kinetic and thermodynamic models. Electrochemical studies like, Tafel plot and AC impedance studies were used for appraisingthe green inhibitor behavior. The Tafel plot studies shows that, AH extract act as mixed type corrosion inhibitor for copper in acid media, mild steel in acid and alkali media, whereas AH extract act as anodic type corrosion inhibitor for copper in alkali media. The results of chemical and electrochemical techniques proved that, tender arecanut husk (AH) extract was the most efficacious eco-friendly corrosion inhibitor for mild steel and copper metals in both HCl and NaOH media with a concentration-dependent mode. Surface depiction via scanning electron microscopy (SEM) technique surmised the dearth of corrosion products and topographic amendment of the studied metals. Therefore, technological and economic profit is envisaged from an affirmative result in this study.

Ciprofloxacin as Eco-Friendly Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solution

Ciprofloxacin as Eco-Friendly Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid Solution