Investigations on some coumarin based corrosion inhibitors for mild steel in aqueous acidic medium: Electrochemical, surface morphological, density functional theory and Monte Carlo simulation approach

Verma, Dakeshwar Kumar; Ech–chihbi, E.; El-Hajjaji, F.; Phukan, Mayur Mausoom; Alnashiri, Hassien M.

doi:10.1016/j.molliq.2021.115531

Cited by 54 publications

(11 citation statements)

References 70 publications

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“…Corrosion is a natural electrochemical process that transforms metal into a more stable chemical form, such as metal oxides, sulfides, and chlorides [1]. Steel and its important alloys are widely used as important construction materials in the chemical, petrochemical, thermal and nuclear industries.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

Saigaa

Bouguessa

Boukhedena

et al. 2023

J. Electrochem. Sci. Eng.

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Ethyl acetate extract of Asphodelus ramosus (ARAE) was examined as an anti-corrosion agent for carbon steel (CS) in 1 M HCl acid medium using different techniques, namely weight loss method, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) at various temperatures and inhibitor concentrations. An inhibition efficiency of 89.81 % was obtained by the weight loss method at the inhibitor concentration of 700 ppm at 293 K. Increasing the temperature decreases the corrosion inhibition rate. Potentiodynamic polarization results showed that the extract is adsorbed on CS surface according to the Freundlich isotherm, while negative values of the standard free energy of adsorption (DG0ads) suggested the physical spontaneity of the adsorption reaction. Scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) analyses were performed to examine the surface morphology of inhibited and uninhibited CS samples. Central composite design (CCD) based optimization was engaged to analyze factors and maximize inhibition efficiency by applying response surface methodology (RSM) using Design-Expert software.

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Section: Introductionmentioning

confidence: 99%

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

Saigaa

Bouguessa

Boukhedena

et al. 2023

J. Electrochem. Sci. Eng.

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“…The calculated value of ΔGads and Kads are tabulated. Negative sign of ΔGads notify that the adsorption on the mild steel is a spontaneous process [41]. Lastly we can conclude that the adsorption process of inhibitors at the surface of mild steel include physisorption.…”

Section: Table 7 Kinetics/thermodynamic Parameters Of Mild Steel Corr...mentioning

confidence: 57%

In(OTf)3 Catalyzed Regioselective Approach for Synthesis of Multi-Functionalized Benzopyranophenazine Derivatives as Latent Corrosion Inhibitors on Mild Steel in 1 M HCl

Leelakrishnan¹,

Elumalai

Jagadeesan

et al. 2022

Preprint

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A rapid and regioselective strategy have developed for synthesis of multi-functional phenazine derivatives such as 3- amino-1- (2-hydroxy phenyl) -1H- benzo[a] pyrano [2,3-c] phenazine -2- carbonitrile benzo-pyrano-phenazine (BPP), 3-amino-1-(2-hydroxy-5-methoxyphenyl)-1H-benzo[a]pyrano[2,3-c]phenazine-2-carbonitrile (MBPP) and 3-amino-1-(5-bromo-2-hydroxyphenyl)-1H-benzo[a]pyrano[2,3-c]phenazine-2-carbonitrile (BBPP) using In(OTf)3 as catalyst in simple one-pot multi-component reaction. Further, the regioselectivity of the product formation was confirmed by DFT studies. In addition, the synthesized compounds were evaluated for their corrosion inhibition strength on mild steel in 1 M hydrochloric acid solution by using weight loss and electrochemical techniques in the first time. Interestingly, the inhibition efficiency was increased up to 98.64 % with an increase in the inhibitor concentration and it was decreased with increases in temperature. These results indicate that our synthesized compounds adopt the Langmuir isotherm model. Further, the polarization measurements clearly indicate that synthesized phenazine derivatives act as mixed-type inhibitors. Also, the electrochemical impedance studies (EIS) strongly revealed that these compounds inhibit corrosion by adsorption mechanism. Moreover, the efficiency of corrosion inhibitors was explained by the surface morphology of the inhibited and uninhibited specimens and was examined using scanning electron microscopy (SEM). Finally, the correlation between the inhibition performance of phenazines and their structural parameters was clearly examined by DFT calculations.

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“…The synthesis of organic inhibitors requires multiple steps and also so many side products are generated in the synthesis of organic molecules. Recently, computational methods have been used extensively for the study of corrosion inhibition [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95]. The corrosion inhibition can be known by knowing the mechanism of interaction between the inhibitor molecules and the metal surface.…”

Section: Computational Methods Used For Corrosion Inhibitorsmentioning

confidence: 99%

Organic Corrosion Inhibitors

Sahu¹

2023

Introduction to Corrosion - Basics and Advances

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Organic corrosion inhibitors are preferred due to its environmental friendly and effectiveness at a wide range of temperatures. The efficiency of an organic inhibitor depends on the size of the organic molecule, aromaticity, type, and number of bonding atoms or groups in the molecule (either π or σ), nature and surface charge, the distribution of charge in the molecule, and type of aggressive media. The presence of polar functional groups with S, O, or N atoms in the molecule, heterocyclic compounds and pi electrons present in the molecule also increases the efficiency of these organic corrosion inhibitors. The use of computational chemistry such as density functional theory (DFT), molecular dynamic simulation (MD), Monte Carlo (MC) simulations, and quantitative structure-activity relationship (QSAR) modeling has been applied for study of corrosion inhibition properties of organic compounds. This chapter will explain about theoretical and computational study of organic compounds as corrosion inhibitors.

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Investigations on some coumarin based corrosion inhibitors for mild steel in aqueous acidic medium: Electrochemical, surface morphological, density functional theory and Monte Carlo simulation approach

Cited by 54 publications

References 70 publications

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

Optimization of the inhibition corrosion of carbon steel in an acidic medium by a novel eco-friendly inhibitor Asphodelus ramosus using response surface methodology

In(OTf)3 Catalyzed Regioselective Approach for Synthesis of Multi-Functionalized Benzopyranophenazine Derivatives as Latent Corrosion Inhibitors on Mild Steel in 1 M HCl

Organic Corrosion Inhibitors

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