Corrosion Inhibition Of Mild Steel Research Articles

Exploring chromone derivatives as environmentally friendly corrosion inhibitors for mild steel in acidic environments: A comprehensive experimental and DFT study

Exploring chromone derivatives as environmentally friendly corrosion inhibitors for mild steel in acidic environments: A comprehensive experimental and DFT study

Combined electrochemical, DFT/MD-simulation and hybrid machine learning based on ANN-ANFIS models for prediction of doxorubicin drug as corrosion inhibitor for mild steel in 0.5 M H2SO4 solution

In this work, Doxorubicin drug was used as mild steel corrosion inhibitor in 0.5 M H2SO4 solution. Herein, standard techniques like gravimetric, electrochemical measurement, density functional theory via DFT/ molecular dynamic simulation (MDS), Scanning electron microscopic (SEM), were used for proper evaluation of Doxorubicin drug as anticorrosive agent. According to the experimental findings, Doxorubicin drug significantly inhibits mild steel corrosion, and its effectiveness increases with an increase in the drug concentration. Maximum inhibition efficiency at 100 ppm was 93.3 %, 91.3 % and 96.8 % for electrochemical impedance (EIS), polarization test (PDP) and gravimetric techniques respectively. The electrochemical study indicates that Doxorubicin is a mixed-type inhibitor. Close scrutiny of the corroded and inhibited metals evidenced that Doxorubicin drug produced a better and more uniform coating on the surface of mild steel. The molecular structure of the drug and its contribution to the inhibition mechanism was further understood using simulations based on density functional theory (DFT) and molecular dynamics simulation (MDS). In addition, artificial neural networks (ANN) and adaptive neuro-fuzzy inference system (ANFIS) were used to predict and model the interactive effects affecting the response. Also, statistical parameters like coefficient of determination (R2), root mean square error (RMSE), mean absolute percentage error (MAPE), and mean absolute deviation (MAD) were used to assess the models' performance. The results demonstrate that the FCM-clustered ANFIS model with 15 clusters perform better than ANN model with RMSE, MAD, MAPE, and R2values of 0.978, 0.642, 4.823, and 0.9925 at the testing phase, and 0.6435, 0.4248, 2.8151, and 0.9998 at the training phase respectively. The best prediction was made using complete FCM-ANFIS model, which had accuracy of 98.4 %. Hence, a robust system prediction can be achieved via ANN and ANFIS algorithms to predict corrosion inhibition of mild steel in acidic environment using drug based corrosion inhibitors.

Melamine-benzaldehyde tris-schiff base as an efficient corrosion inhibitor for mild steel in 0.5 molar hydrochloric acid solution: Weight loss, electrochemical, theoretical and surface studies

Melamine-benzaldehyde tris-schiff base as an efficient corrosion inhibitor for mild steel in 0.5 molar hydrochloric acid solution: Weight loss, electrochemical, theoretical and surface studies

Electrochemical, surface morphological and computational evaluation on carbohydrazide Schiff bases as corrosion inhibitor for mild steel in acidic medium

Anticorrosion and adsorption behaviour of synthesized carbohydrazide Schiff bases, namely (Z)-N′-(4-hydroxy-3-methoxybenzylidene)-6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carbohydrazide(MBTC) and (Z)-N′-(3,4-dichlorobenzylidene)-6-methyl-2-oxo-4-phenyl-1,2,3,4-tetrahydropyrimidine-5-carbohydrazide (CBTC) was examined for mild steel (MS) in 15% HCl medium. The corrosion inhibition study was performed by using gravimetric, thermodynamic, electrochemical and theoretical studies including density functional theory (DFT), molecular dynamic simulation (MDS) and Monte Carlo simulations (MCS). The outcomes in terms of corrosion inhibition efficiency using electrochemical impedance spectroscopy (EIS) method at 303 K and 150 ppm concentration were 96.75% for MBTC and 95.14% for CBTC. Both inhibitors adsorbed on the MS surface through physical as well as chemical adsorption and followed the Langmuir isotherm. The mixed-type nature of both inhibitors was identified by polarization results. Surface analysis was done using FESEM, EDX, AFM and XPS studies and results showed that a protective layer of inhibitor molecules was developed over the surface of MS. The results of DFT, MCS and MDS are in accordance with experimental results obtained by weight loss and electrochemical methods.

New organic ammonium salts as corrosion inhibitors for mild steel in saline solution.

New organic ammonium salts as corrosion inhibitors for mild steel in saline solution.

Adsorption isotherm and molecular modeling of phytoconstituents from Dillenia suffruticosa leaves for corrosion inhibition of mild steel in 1.0 M hydrochloric acid solution

Plant extracts as green corrosion inhibitors have gained significant attention in minimizing metallic corrosion due to the presence of heteroatoms and polar groups found in extract molecules. The present work focused on the novel implementation of Dillenia suffruticosa leaves extract (DSLE) as a green corrosion inhibitor for corrosion protection of mild steel in 1 M hydrochloric (HCl) acid. Gravimetric characterizations and adsorption isotherm modeling (Langmuir, Temkin, El-Awady Sips, and Freundlich) showed that DSLE is an excellent corrosion inhibitor with inhibitive performance that increases with increasing extract concentration. Potentiodynamic polarization (PDP) showed that DSLE behaved as a mixed-type corrosion inhibitor. Given that one limitation of using plant extracts is its solubility in polar electrolytes, Monte Carlo (MC) simulations and density-functional theory (DFT) calculations were carried out to investigate the surface adsorption properties between polar and non-polar compounds found in DSLE. The results obtained showed that polar phytocompounds (saponins) were primary agents for corrosion inhibition. Our findings highlight the potential of using polar phytocompounds from Dillenia suffruticosa as green corrosion inhibitors for mild steel particularly in applications containing polar solvents and electrolytes.

Evaluation of the effectiveness of gabapentin as a corrosion inhibitor for mild steel in a 1 M hydrochloric acid environment using theoretical and experimental methods

Evaluation of the effectiveness of gabapentin as a corrosion inhibitor for mild steel in a 1 M hydrochloric acid environment using theoretical and experimental methods

Assessment of the mild steel corrosion inhibition competence of Garcinia gummi-gutta leaf extract: Evaluation by XPS, thermodynamic, and kinetic parameters

Owing to the high economic and environmental concerns, nowadays scientists have taken much attention to mitigate corrosion. The effectiveness of Garcinia gummi-gutta leaf extract (GGLE) at inhibiting corrosion on mild steel in 1 M HCl was examined in the current study using a weight loss strategy. The GGLE concentration was changed from 100 to 6000 ppm, and the results show that expanding the inhibitor concentration increased the efficacy of corrosion inhibition. At 6000 ppm concentration and 30°C, the maximum inhibitory efficiency was 82.2%; this efficiency decreases as temperature increases. The mechanism of sorption was deliberated by means of different adsorption isotherm and Langmuir adsorption isotherm model holds good for elucidating the adsorption mechanism. The thermodynamic and kinetic parameters were estimated to depict the corrosion process. X-ray photoelectron spectroscopy (XPS) was also used to confirm the development of a coating of inhibitor fragments that protect the metal surface.

Study on benzylidine derivatives as corrosion inhibitors for mild steel in 15% HCl medium: Experimental & theoretical investigation

Corrosion inhibitors are added to acid solutions used during industrial cleaning and descaling procedures to reduce the metallic corrosion. In the present study, benzylidine Schiff base compounds namely 2-((Z)-(4-((E)-(3,4-dimethoxybenzylidene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-ylidene)amino)benzoicacid (DBAB) & (E)N′(4((E)(3,4-dimethoxybenzylidene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-ylidene)-2-hydroxybenzohydrazide (DBAH) were prepared and their corrosion inhibition behavior and adsorption properties were studied by using WL (weight loss), PDP (potentiodynamic polarization) along with EIS (electrochemical impedance spectroscopy) methods for mild steel (MS) in 15% HCl solution at different temperatures. The outcomes indicated that DBAH and DBAB offered inhibition efficacy of 96.98% and 94.01% at 120 ppm concentration, respectively. The potentiodynamic polarization studies showed that both inhibitors act as mixed type inhibitor and undergo effective mixed-type adsorption at MS facet. Surface analysis of corroded samples performed by FESEM, AFM and XPS confirmed the establishment of corrosion protective inhibitor film at the MS facet. Additionally, MCS (Monte carlo simulation) and DFT studies support the experimental results obtained by weight loss and electrochemical methods.

Evaluating the efficacy of synthesized quinoline derivatives as Corrosion inhibitors for mild steel in acidic environments: An analysis using electrochemical, computational, and surface techniques

Two quinoline derivatives such as 5-(ethoxymethyl)-2-methylquinoline-8-ol,and 5-((2-aminoethoxy)methyl)-2-methylquinoline-8-ol symbolized by (Q) and (QN), respectively were studied in HCl (1.0 M) by experimental, and computational approaches to inhibit the corroding of the mild steel (M-S). Q and QN were found to delay the corrosion of the mild steel in the research environment. Q and QN displayed mixed inhibiting properties, decreasing the rate of anodic and cathodic corrosion reactions. The Q and QN molecules developed a film on the surface of the material in HCl (1.0 M), which is consistent with the impedance measurements. Coverage data of the surface adsorption has fitted into the Langmuir adsorption isotherm. SEM/EDS, AFM, contact angle, and XPS analysis also indicated that the adsorbent film of Q and QN protects the steel from ions of acid. In addition, a molecular dynamics simulation was performed to optimize the inhibitor molecule equilibrium configurations at the Fe surface. From the experimental results, the sequence of the effectiveness of the studied inhibitors was validated through theoretical calculations.

Natural chitosan-based carbon dots as an eco-friendly and effective corrosion inhibitor for mild steel in HCl solution

Polysaccharide chitosan and L-histidine were applied to synthesize chitosan-based carbon dots (CA-CDs) by a simple laser ablation method. After characterization of the CA-CDs by FT-IR, UV–vis, Raman, XRD, TEM, and XPS, the CA-CDs were introduced as an eco-friendly and high-performance corrosion inhibitor for mild steel (MS) in 1.0 M HCl solution. The inhibition action and mechanism of CA-CDs were determined by weight loss and electrochemical measurements, in combination with SEM, AFM, and XPS. The results show that CA-CDs as mixed-type inhibitors could effectively weaken the corrosion of MS in 1.0 M HCl solution, and their maximum inhibition efficiency reaches 97.4 % at 40 mg L−1. The adsorption behavior of CA-CDs well obeys the Langmuir adsorption isotherm containing both chemisorption and physisorption. The chemisorption mainly results from the multiple adsorption sites in the CA-CDs, and the physical adsorption is due to the blocking and barrier effect of CA-CD nanoparticles. Both adsorption behaviors were proposed to elucidate the corrosion inhibition mechanism of CA-CDs.

Electrochemical, molecular dynamics, density functional theory, and corrosion inhibition studies of some chromeno-oxadithiin and chromeno disulfide derivatives for mild steel in 3.5% NaCl

Eight derivatives of chromeno-oxadithiin and chromeno disulfide were greenly synthesized during the reactions of different derivatives of 3-Chloro-3-chlorosulfenylchromanones (2a–d) with potassium iodide. The chemical structure of the newly prepared compounds was confirmed by using different spectroscopic methods (IR, 1H &13C NMR, and MS). The redox properties of the prepared compounds were investigated via cyclic voltammetry where most of the compounds exhibited one quasi-reversible redox couple beside one irreversible reduction peak. The charge transfer process was found to be under diffusion control. Some of these compounds were studied as inhibitors for mild steel corrosion in 0.6 M NaCl by using electrochemical techniques. Both the electrochemical methods and the computational simulations proved that adding 1 × 10–3 M of Trispiro[cyclohexane-1,2′-chroman-3′,2″-2H-chromeno[3,4-e][1,3,4]oxadithiin-5″,1″′-cyclohexan]-4′-one(3b) to 0.6 M NaCl inhibited mild steel corrosion by an efficiency of 98.8%. The morphology of mild steel surface after 7 days of immersion in this solution studied by scanning electron microscope (SEM) and showed a homogenous surface. The theoretical studies showed that 1,2-Bis (3-chlorospirochroman-2,1′-cyclohexyl-4-one) disulfane (4b) is the most stable one with an electronic energy of − 3101 au. The effects of the methyl and cyclohexane groups, as well as the effects of heterolysis on the corrosion efficiency, were studied.

Correlation between experimental and theoretical approaches in the performance of new epoxy resin as an effective corrosion inhibitor for mild steel in acid pickling bath

In this recent work, novelty epoxy resin namely 1,3,4,5,6-pentaglycidyloxy hexan-2-one (PGH) was synthesized characterized and studied as a potential anticorrosive protection for mild steel (MS) in 1 M HCl solution. The corrosion inhibition for MS was examined by “potentiodynamic” polarization (PDP), electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation measurements (EFM), scanning electron microscope coupled with energy dispersive X-ray spectroscopy (MES/EDS) and theoretical approaches (DFT and MD simulation). PGH elaborated was investigated by the Fourier transform infrared (FTIR) spectroscopy. Additionally, the inhibitory efficiencies found at higher concentration (10−3 M of the PGH) are 85.5% (EIS) and 88.6% (PDP), respectively. PDP results indicated that the PGH acted as a mixed-type inhibitor in 1 M HCl medium. SEM/EDS characterization represents a terrific decrease in corrosion of the MS surface within 10−3 M of PGH compared with the 1.0 M HCl pure. DFT calculation provided molecular level insights on the nature and the active centres of the corrosion inhibition efficiency of the PGH elaborated. MD simulation showed that the PGH has the maximum inhibition efficiencies at oxygen atoms.

Synthesis of multi donating sites grafted on graphene oxide nanosheets: Anti-corrosion study for mild steel in 1 M HCl with DFT calculations

The functionalization of graphene oxide of Sulphate and Phosphate functionalized graphene oxide nanomaterials were investigated as corrosion inhibitors for mild steel in HCl media by employing weight loss, electrochemical, surface, and computational methods. The graphene oxide (GO) was synthesized from industrial waste material graphite. The GO and seven functionalized GO were characterized by the FTIR, SEM, and EDX techniques. The amide-functionalized GO (N-G) exhibited good corrosion inhibition compared to sulfate (S-G) and phosphate (P-G) functionalized GO. It was further observed that the addition of sulfate and/or phosphate functional groups along with amide (NSP-G), showed an improvement in layering structure and exhibited the highest corrosion inhibition (93.78%). FTIR, SEM, EDX, and Contact Angle studies supported the formation of an inhibitive film of NSP-G on the mild steel surface. Density functional theory (DFT) results reveal that the addition of three functional groups in GO enhanced its interaction sites with the mild steel surface. Molecular dynamics (MD) simulation results show the predominantly chemisorption mechanism of NSP-G on the mild steel surface.

Insights into the quantitative structure-activity relationship for ionic liquids: a bibliometric mapping analysis.

Environmental protection and sustainability is the development goal that countries all over the world are pursuing. Ionic liquids (ILs), as a new type of green material, have a great application prospect. And the quantitative structure-activity relationship (QSAR) is significant for the research of ILs. To better understand the role played by QSAR in the research of ILs, 4139 literatures published in the WOS database from 2002 to 2022 were used for bibliometric analysis, and different types of knowledge maps were mapped to obtain the current status and trends of IL research applied QSAR. The distribution pattern of the literature output chronology, country, institution, author cooperation, and major source journals can be obtained through the research of the distribution of literature. Through core literature, dual-map overlays, and evolutionary path analysis, the research knowledge base was obtained mainly including ionic liquid toxicological properties research, environmental protection and sustainability, ionic liquid design, and mild steel corrosion inhibition; through the co-occurrence and evolution of keywords, the current research hotspots are basic properties of ILs, corrosion inhibition of mild steel, the effect of toxicity on the environment, QSAR modeling methods, solvent application of ILs, and drug design.

Inhibition of Mild Steel Corrosion by Leaves Extracts of Commelina benghalensis L In 1M HCl Solution

The inhibition of mild steel corrosion in 1M HCl by leaves  extracts of Commelina benghalensis L was investigated using weight loss and potentiodynamic polarization techniques at room (30  and elevated temperatures of 40, 50, 60 and 70. The results of weight loss technique showed that the inhibition efficiency increased with increase in extract concentration and exposure time but decreased with rise in temperature. The maximum inhibition efficiency obtained was 81.71 % at 0.5 g/L concentration of leaves extracts. Corrosion rates decreased with increased concentration of extracts but increased with increase in temperature. Potentiodynamic polarization method results indicated that Commelina benghalensis L is a mixed - type inhibitor as it modified both the anodic and cathodic reactions in 1M HCl solution. The adsorption of the extracts on the mild steel coupons was observed to follow Langmuir and Temkin adsorption isotherms. The negative values of Gibb’s free energy of adsorption ranged from -21.35 to -23.03 kJ/mol., this suggests that inhibitor molecules were physically and spontaneously adsorbed onto the metal surface.

Heterocyclic group end-capped polyethylene glycol: Synthesis and used as corrosion inhibitors for mild steel in HCl medium

In this work, two categories of water-soluble polymeric corrosion inhibitors (CIs) are contributed. These CIs are composed by polyethylene glycol (PEG) middle segment and oleic imidazoline (or thiophene) end groups, respectively labeled as OIM-PEG-OIM and Th-PEG-Th. Two facile synthetic strategies involve epoxy-amino reaction and thiol-acrylate Michael addition were employed. Both Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy verified that a series of target products were successfully obtained. The solution transmittance measurements indicated that with the increase of the PEG segment length, the water solubility of CIs enhanced. And these obtained CIs exhibit somewhat surface activity and could reduce the solution surface tensions to a certain extent. The inhibition efficiencies of these CIs for mild steel in HCl medium were evaluated by weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). It was found that both OIM-PEG-OIM and Th-PEG-Th show an improved corrosion inhibition efficiency as compared to PEG. And as compared to heterocyclic compounds, introduction of PEG segment showed a negligible influence on their performances. Both CIs can form chemisorption on the metal surface, and the adsorption process follow Langmuir adsorption mechanism. OIM-PEG-OIM exhibit superior inhibition performance and stability as compared to Th-PEG-Th, which can be attributed to the fact that OIM-PEG-OIM bearing two long hydrophobic alkyl end groups. Scanning electron microscope (SEM) observations as well as atomic force microscopy (AFM) measurements also confirmed both OIM-PEG-OIM and Th-PEG-Th could serve as water-soluble CIs for mild steel.

A research combined experimental and computational approaches of Succinylsulfathiazole Hydrate as potent corrosion inhibitor for mild steel in acidic medium

Organic derivatives are a relatively new and effective family of corrosion inhibitors, according to recent studies, and they almost totally satisfy the requirements for a chemical to be utilized as an aqueous phase corrosion inhibitor. The current study demonstrated the use of a thiazole derivative, namely Succinylsulfathiazole Hydrate (SSTH) as a corrosion inhibitor (CI) to safeguard mild steel (MS) in 1 M HCl media. Gravimetric, electrochemical (EC), and surface characterization methods have been utilized to evaluate the SSTH’s effectiveness at mitigating corrosion. According to the projected findings of the gravimetric investigation, the SSTH followed the Langmuir adsorption isotherm (LAI) model, providing additional resilience and improved inhibition efficiency against MS corrosion, with maximal inhibitive effectiveness (IEWL%), being 96.13% for SSTH. Furthermore, the electrochemical results revealed a mixed adsorption character of SSTH's inhibitive activity with cathodic dominance highlighting how polarization resistance (Rp) values rise from (35.99 - 448.25) Ω.cm2 with augmentation in the concentration of SSTH (50 → 800) ppm and approach the peak value of 448.25 Ω.cm2 at 800 ppm of SSTH. To authenticate the experimental findings, theoretical methods including quantum chemical calculation (QCC) and molecular dynamics (MD) simulation were also operated. With the aid of these theoretical approaches in the computation of the quantum chemical parameters, the association between the inhibitory activity and the molecular structure was discovered.

Electrochemical and Morphological investigations of Elettaria cardamomum pod extract as a green corrosion inhibitor for Mild steel corrosion in 1 N HCl

The corrosion inhibition performance of an ethanolic extract from Elettaria cardamomum pod (ECPE) as a corrosion inhibitor for Mild Steel (MS) in 1 N Hydrochloric acid (1 N HCl) electrolyte was investigated via gravimetric analysis and electrochemical studies like Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP) studies. Qualitative technique such as Gas Chromatography-Mass Spectrometry (GC–MS) was used to identify the main phytochemical components of the ECPE, such as phenolic chemicals, tannins, flavonoids, amino acids, carbohydrates, proteins, and terpenoids. With increasing in inhibitor concentrations (50-250 ppm), it was discovered that the efficiency of the inhibition increased to a maximum inhibition of 60.6% with 250 ppm at 303 K after 1hr. The influence of four distinct temperatures (303-333 K) were also examined where the inhibition efficiency decreased with temperature. The inhibitors were adsorbed onto the MS surface via physisorption. The adsorption of inhibitor appears to function through Freundlich adsorption isotherm more appropriately. EIS study showed that the values of resistance due to charge transfer (Rct) increased with concentration of ECPE where the PDP plots indicate that the extract functions as a mixed inhibitor affecting both the anodic and cathodic partial reactions of the corrosion process. Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Spectroscopy (EDX), Fourier Transform Infrared Spectroscopy (FT-IR), and Atomic Force Microscope (AFM) investigated the surface morphology and topology of the MS which confirmed the adsorption of inhibitor molecules on the metal surface. The contact angle method predicted the hydrophobic nature of the MS in the presence of inhibitor. The results of Ultraviolet-Visible Spectroscopy (UV-Vis) provide evidence of iron/inhibitor interaction, which is responsible for the inhibition of corrosion. From all these investigations, it can be concluded that the ECPE acted as a good corrosion inhibitor for MS in a 1 N HCl electrolyte.

Corrosion Inhibition of Mild Steel in Hydrochloric Acid Medium Using Schiff Base Synthesized by Green Approach

Corrosion Inhibition of Mild Steel in Hydrochloric Acid Medium Using Schiff Base Synthesized by Green Approach