Ambrish Singh - Academia.edu (original) (raw)

Papers by Ambrish Singh

Research paper thumbnail of A Theoretical Approach to the Study of Some Plant Extracts as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Research paper thumbnail of A Theoretical Approach to the Study of Some Plant Extracts as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Oriental Journal Of Chemistry, 2013

Research paper thumbnail of Phenobarbital: A New and Effective Corrosion Inhibitor for Mild Steel in 1 M HCl Solution

Asian Journal of Chemistry, 2013

Research paper thumbnail of Use of HPHT Autoclave to determine corrosion inhibition by poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) polymer on carbon steels in 3.5% NaCl solution saturated with CO 2

高分子科学, Sep 4, 2014

ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on cor... more ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on corrosion of carbon steels (J55, N80, P110SS and C110 steels) in 3.5 wt% NaCl solution saturated with CO2 was evaluated using static high pressure and high temperature (HPHT) autoclave. The surface was further evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and contact angle measurements. Quantum chemical calculations have been used to evaluate the structural, electronic and reactivity parameters of the inhibitor on the steels surface. SEM, XRD and contact angle measurement studies reveal that the surface of metals are quite unaffected after use of inhibitor in 3.5% NaCl solution saturated with CO2.

Research paper thumbnail of A Study on the Inhibition of J55 and P110SS Steel in 3.5% NaCl Solution Saturated with CO2 by Seed Extract of Momordica charantia (Karela)

Solid State Phenomena, Mar 3, 2015

ABSTRACT Seed extract of Momordica charantia (MC) was used to investigate the inhibition efficien... more ABSTRACT Seed extract of Momordica charantia (MC) was used to investigate the inhibition efficiency on corrosion of J55 and P110SS steel in 3.5% NaCl solution saturated with CO2 through AC impedance, polarization curves, and SEM techniques. The Nyquist diagrams showed increase in Rct values in the presence of inhibitor, thus increasing inhibition efficiency. Potentiodynamic curves suggested that the inhibitor is mixed type in nature. The adsorbed film on J55 and P110SS steel surface containing inhibitor was confirmed by the SEM results.Keywords: Momordica charantia, P110SS steel, J55 steel, SEM

Research paper thumbnail of Fabrication and characterization of Magneli phase Ti4O7 submicron rods

Journal of Materials Science: Materials in Electronics, 2016

Research paper thumbnail of Pyridine derivatives as corrosion inhibitors for N80 steel in 15% HCl: Electrochemical, surface and quantum chemical studies

Research paper thumbnail of Extract of Momordica charantia (Karela) Seeds as Corrosion Inhibitor for P110SS Steel in Co 2 Saturated 3.5% NaCl Solution

International Journal of Electrochemical Science, Oct 1, 2013

The inhibition behavior of Momordica charantia seeds (MCS) as an eco-friendly corrosion inhibitor... more The inhibition behavior of Momordica charantia seeds (MCS) as an eco-friendly corrosion inhibitor for P110SS steel was investigated in 3.5 wt.% NaCl saturated with CO 2 solution by means of polarization curve, AC impedance, and scanning electrochemical spectroscopy (SECM). The results showed that MCS can inhibit the corrosion of P110SS steel. The maximum inhibition efficiency is achieved when MCS concentration is 1000 ppm by weight in this study. The adsorption of the studied inhibitor obeyed the Langmuir's adsorption isotherm.

Research paper thumbnail of 2-Aminobenzene-1,3-dicarbonitriles as green corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, thermodynamic, surface and quantum chemical investigation

Journal of the Taiwan Institute of Chemical Engineers, 2015

ABSTRACT The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dih... more ABSTRACT The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) were synthesized and their corrosion inhibition properties on mild steel in 1 M HCl were investigated using weight loss and electrochemical techniques. Among the compounds investigated, ABDN-3 exhibited the best inhibition efficiency of 97.83% at 100 mg/L. Scanning electron microscopy (SEM) and dispersive X-ray spectroscopy (EDX) examinations was performed on inhibited and uninhibited mild steel samples to show the presence of ABDNs on mild steel surface. The potentiodynamic polarization studies reveal that all three studied inhibitors were of mixed type and their adsorption on the mild steel surface in 1 M HCl follows the Langmuir adsorption isotherm. Quantum chemical calculations studied were also performed to support weight loss and electrochemical experimental observations.

Research paper thumbnail of Gingko biloba fruit extract as an eco-friendly corrosion inhibitor for J55 steel in CO2 saturated 3.5% NaCl solution

Journal of Industrial and Engineering Chemistry, 2015

ABSTRACT The inhibition of the corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO... more ABSTRACT The inhibition of the corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO2 by the fruit extract of Gingko biloba (GFE) has been studied using mass spectrometry (MS), Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, contact angle measurements, and scanning electron microscopy (SEM). Inhibition efficiency was found to increase with increasing concentration of the extract. The adsorption of the extract on the J55 steel surface obeyed the Langmuir adsorption isotherm. The adsorbed film on J55 steel surface containing inhibitor was confirmed by the contact angle, and SEM results. The results obtained showed that the GFE could serve as an effective inhibitor of the corrosion of J55 steel in 3.5% NaCl saturated with CO2.

Research paper thumbnail of Electrochemical and surface studies of some Porphines as corrosion inhibitor for J55 steel in sweet corrosion environment

Applied Surface Science, 2015

Research paper thumbnail of Corrosion mitigation of J55 steel in 3.5% NaCl solution by a macrocyclic inhibitor

Applied Surface Science, 2015

Research paper thumbnail of Use of HPHT autoclave to determine corrosion inhibition effect of poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) on carbon steels in 3.5% NaCl solution saturated with CO2

Chinese Journal of Polymer Science, 2014

ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on cor... more ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on corrosion of carbon steels (J55, N80, P110SS and C110 steels) in 3.5 wt% NaCl solution saturated with CO2 was evaluated using static high pressure and high temperature (HPHT) autoclave. The surface was further evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and contact angle measurements. Quantum chemical calculations have been used to evaluate the structural, electronic and reactivity parameters of the inhibitor on the steels surface. SEM, XRD and contact angle measurement studies reveal that the surface of metals are quite unaffected after use of inhibitor in 3.5% NaCl solution saturated with CO2.

Research paper thumbnail of A study on the inhibition of N80 steel in 3.5% NaCl solution saturated with CO2 by fruit extract of Gingko biloba

Journal of the Taiwan Institute of Chemical Engineers, 2014

The influence of polymer of 2-(methoxycarbonyl)-1-propene (MMA) monomer and poly N-vinyl-2pyrroli... more The influence of polymer of 2-(methoxycarbonyl)-1-propene (MMA) monomer and poly N-vinyl-2pyrrolidone (NVP) monomer namely poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) or P(MMAco-VP) on corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO 2 was evaluated using Fourier transform infrared spectroscopy (FTIR), Tafel polarization, electrochemical impedance spectroscopy (EIS), UV-visible, and scanning electron microscopy (SEM). Results obtained showed that polymer is a mixed type inhibitor as the maximum-E corr displacement is 58 mV. The adsorption of the extract on the J55 steel surface obeyed the Langmuir adsorption isotherm. SEM and UV-visible spectroscopy studies reveal that the surface of metal is quite unaffected after the use of P(MMA-co-VP) in 3.5% NaCl solution saturated with CO 2 .

Research paper thumbnail of Inhibition effect of environmentally benign Kuchla (Strychnos Nuxvomica) seed extract on corrosion of mild steel in hydrochloric acid solution

Rasayan Journal of Chemistry

The inhibition of the corrosion of mild steel in hydrochloric acid solution by the seed extract o... more The inhibition of the corrosion of mild steel in hydrochloric acid solution by the seed extract of Kuchla (Strychnos Nuxvomica) has been studied using weight loss, electrochemical impedance spectroscopy, potentiodynamic polarization and linear polarization techniques. Inhibition was found to increase with increasing concentration of the extract. The effect of temperature, immersion time and acid concentration on the corrosion behavior of mild steel in 1 M HCl with addition of extract was also studied. The adsorption of the extract on the mild steel surface obeyed the Langmuir adsorption isotherm. Values of inhibition efficiency calculated from weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) are in good agreement. Polarization curves showed that Kuchla (Strychnos Nuxvomica) seed extract behaves as a mixed-type inhibitor in hydrochloric acid. The activation energy as well as other thermodynamic parameters for the inhibition process was calculated. The adsorbed film on mild steel surface containing Kuchla (Strychnos Nuxvomica) seed extract inhibitor was also measured by Fourier transform infrared spectroscopy (FTIR). The results obtained showed that the seed extract of Kuchla (Strychnos Nuxvomica) could serve as an effective inhibitor of the corrosion of mild steel in hydrochloric acid media.

Research paper thumbnail of Effect of fruit extracts of some environmentally benign green corrosion inhibitors on corrosion of mild steel in hydrochloric acid solution

Journal of Materials and Environmental Science

The inhibition of the corrosion of mild steel in hydrochloric acid solution by the fruits extract... more The inhibition of the corrosion of mild steel in hydrochloric acid solution by the fruits extract of Shahjan (Moringa oleifera), Pipali (Piper longum) and Orange (Citrus aurantium) has been studied using weight loss, electrochemical impedance spectroscopy, potentiodynamic polarization and linear polarization techniques. Inhibition was found to increase with increasing concentration of the extract. The effect of temperature, immersion time and acid concentration on the corrosion behavior of mild steel in 1 M HCl with addition of extract was also studied. The adsorption of the extract on the mild steel surface obeyed the Langmuir adsorption isotherm. Values of inhibition efficiency calculated from weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) are in good agreement. Polarization curves showed that fruits extract behaves as a mixed-type inhibitor in hydrochloric acid. The activation energy as well as other thermodynamic parameters for the inhibition process was calculated. The adsorbed film on mild steel surface containing fruits extract was also measured by Fourier transform infrared spectroscopy (FTIR). The results obtained showed that the fruits extract could serve as effective inhibitor of the corrosion of mild steel in hydrochloric acid media.

Research paper thumbnail of Azwain (Trachyspermum copticum) seed extract as an efficient corrosion Inhibitor for Aluminium in NaOH solution

The present work investigates corrosion behaviour of the aluminium in 0.5 M NaOH solution in the ... more The present work investigates corrosion behaviour of the aluminium in 0.5 M NaOH solution in the presence of Azwain (Trachyspermum copticum) seed extract by weight loss and electrochemical techniques. Experimental results revealed that inhibition efficiency increases with increasing inhibitor concentration and reached at maximum 94% at 500 ppm inhibitor concentration. Adsorption of inhibitor molecules on the surface of aluminium followed Langmuir adsorption isotherm model. Tafel polarization analyses indicated that studied compound is mixed type inhibitor. The data obtained from polarization method and weight loss methods were in good agreement. The Azwain (Trachyspermum copticum) seed extract is environmental friendly, biodegradable, nontoxic, cheap and easily available source of material which is used as corrosion inhibitor for aluminium metal in 0.5 M NaOH.

Research paper thumbnail of Dapsone: A Novel Corrosion Inhibitor for Mild Steel in Acid Media

The Open Electrochemistry Journal

Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H 2 SO 4 by dapsone were studied by polar... more Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H 2 SO 4 by dapsone were studied by polarization resistance, Tafel polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurement. Results obtained revealed that inhibition occurs through adsorption of the drug on metal surface without modifying the mechanism of corrosion process. Potentiodynamic polarization suggested that it acts as a mixed type predominantly cathodic in HCl and predominantly anodic in H 2 SO 4 . Electrochemical impedance spectroscopy was used to investigate the mechanism of corrosion inhibition. Thermodynamic parameters such as a E ,°a H , °a S , °a ds H were calculated to investigate mechanism of inhibition. The adsorption of dapsone followed Langmuir adsorption isotherm.

Research paper thumbnail of Cetirizine: A New and Effective Corrosion Inhibitor for Mild Steel in 1 M HCl solution

International journal of electrochemical science

Cetirizine was investigated as corrosion inhibitor for mild steel (MS) in 1 M HCl solution by wei... more Cetirizine was investigated as corrosion inhibitor for mild steel (MS) in 1 M HCl solution by weight loss, electrochemical measurements and quantum chemical calculations. Cetirizine showed 95% inhibition efficiency even at very low concentration of 100 ppm. Polarization study indicates that Cetirizine behaves like a mixed type inhibitor. The adsorption of the inhibitor follows Langmuir adsorption isotherm. The quantum chemical calculations were applied to elucidate adsorption pattern of inhibitor molecules on steel surface.

Research paper thumbnail of Experimental and Theoretical Investigation for Inhibition Action and Adsorption Behavior of Montelukast Sodium in 1 M HCl Solution

International journal of electrochemical science

(1-hydroxy-1-methyl-ethyl)phenyl]-propyl]sulfanylmethyl]cyclopropyl]acetic acid sodium salt) for ... more (1-hydroxy-1-methyl-ethyl)phenyl]-propyl]sulfanylmethyl]cyclopropyl]acetic acid sodium salt) for corrosion of mild steel (MS) in 1 M HCl solution was studied by weight loss, electrochemical and quantum chemical methods. Montelukast sodium showed good inhibition efficiency (97% observed at 100 ppm). Polarization study indicated mixed-type nature of the inhibitor. The adsorption of the inhibitor followed Langmuir adsorption isotherm. Quantum chemical calculations provided good support for the adsorption of inhibitor molecules on the mild steel surface. Mechanism of inhibition was further corroborated by the values of activation parameters obtained from the experimental data. Optical microscopy was used to characterize the metal surface before and after adsorption of inhibitor.

Research paper thumbnail of A Theoretical Approach to the Study of Some Plant Extracts as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Research paper thumbnail of A Theoretical Approach to the Study of Some Plant Extracts as Green Corrosion Inhibitor for Mild Steel in HCl Solution

Oriental Journal Of Chemistry, 2013

Research paper thumbnail of Phenobarbital: A New and Effective Corrosion Inhibitor for Mild Steel in 1 M HCl Solution

Asian Journal of Chemistry, 2013

Research paper thumbnail of Use of HPHT Autoclave to determine corrosion inhibition by poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) polymer on carbon steels in 3.5% NaCl solution saturated with CO 2

高分子科学, Sep 4, 2014

ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on cor... more ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on corrosion of carbon steels (J55, N80, P110SS and C110 steels) in 3.5 wt% NaCl solution saturated with CO2 was evaluated using static high pressure and high temperature (HPHT) autoclave. The surface was further evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and contact angle measurements. Quantum chemical calculations have been used to evaluate the structural, electronic and reactivity parameters of the inhibitor on the steels surface. SEM, XRD and contact angle measurement studies reveal that the surface of metals are quite unaffected after use of inhibitor in 3.5% NaCl solution saturated with CO2.

Research paper thumbnail of A Study on the Inhibition of J55 and P110SS Steel in 3.5% NaCl Solution Saturated with CO2 by Seed Extract of Momordica charantia (Karela)

Solid State Phenomena, Mar 3, 2015

ABSTRACT Seed extract of Momordica charantia (MC) was used to investigate the inhibition efficien... more ABSTRACT Seed extract of Momordica charantia (MC) was used to investigate the inhibition efficiency on corrosion of J55 and P110SS steel in 3.5% NaCl solution saturated with CO2 through AC impedance, polarization curves, and SEM techniques. The Nyquist diagrams showed increase in Rct values in the presence of inhibitor, thus increasing inhibition efficiency. Potentiodynamic curves suggested that the inhibitor is mixed type in nature. The adsorbed film on J55 and P110SS steel surface containing inhibitor was confirmed by the SEM results.Keywords: Momordica charantia, P110SS steel, J55 steel, SEM

Research paper thumbnail of Fabrication and characterization of Magneli phase Ti4O7 submicron rods

Journal of Materials Science: Materials in Electronics, 2016

Research paper thumbnail of Pyridine derivatives as corrosion inhibitors for N80 steel in 15% HCl: Electrochemical, surface and quantum chemical studies

Research paper thumbnail of Extract of Momordica charantia (Karela) Seeds as Corrosion Inhibitor for P110SS Steel in Co 2 Saturated 3.5% NaCl Solution

International Journal of Electrochemical Science, Oct 1, 2013

The inhibition behavior of Momordica charantia seeds (MCS) as an eco-friendly corrosion inhibitor... more The inhibition behavior of Momordica charantia seeds (MCS) as an eco-friendly corrosion inhibitor for P110SS steel was investigated in 3.5 wt.% NaCl saturated with CO 2 solution by means of polarization curve, AC impedance, and scanning electrochemical spectroscopy (SECM). The results showed that MCS can inhibit the corrosion of P110SS steel. The maximum inhibition efficiency is achieved when MCS concentration is 1000 ppm by weight in this study. The adsorption of the studied inhibitor obeyed the Langmuir's adsorption isotherm.

Research paper thumbnail of 2-Aminobenzene-1,3-dicarbonitriles as green corrosion inhibitor for mild steel in 1 M HCl: Electrochemical, thermodynamic, surface and quantum chemical investigation

Journal of the Taiwan Institute of Chemical Engineers, 2015

ABSTRACT The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dih... more ABSTRACT The three 2-aminobenzene-1,3-dicarbonitriles derivatives (ABDNs) namely 5′-amino-2,4-dihydroxy-4″-methyl-1,1′:3′,1″-terphenyl-4′,6-dicarbonitrile (ABDN-1), 5′-amino-2,2″,4-trihydroxy-1,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-2) and 5′-amino-2,3″,4-trihydroxy-1,3-methoxy,1′:3′,1″-terphenyl-4′,6′-dicarbonitrile (ABDN-3) were synthesized and their corrosion inhibition properties on mild steel in 1 M HCl were investigated using weight loss and electrochemical techniques. Among the compounds investigated, ABDN-3 exhibited the best inhibition efficiency of 97.83% at 100 mg/L. Scanning electron microscopy (SEM) and dispersive X-ray spectroscopy (EDX) examinations was performed on inhibited and uninhibited mild steel samples to show the presence of ABDNs on mild steel surface. The potentiodynamic polarization studies reveal that all three studied inhibitors were of mixed type and their adsorption on the mild steel surface in 1 M HCl follows the Langmuir adsorption isotherm. Quantum chemical calculations studied were also performed to support weight loss and electrochemical experimental observations.

Research paper thumbnail of Gingko biloba fruit extract as an eco-friendly corrosion inhibitor for J55 steel in CO2 saturated 3.5% NaCl solution

Journal of Industrial and Engineering Chemistry, 2015

ABSTRACT The inhibition of the corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO... more ABSTRACT The inhibition of the corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO2 by the fruit extract of Gingko biloba (GFE) has been studied using mass spectrometry (MS), Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, contact angle measurements, and scanning electron microscopy (SEM). Inhibition efficiency was found to increase with increasing concentration of the extract. The adsorption of the extract on the J55 steel surface obeyed the Langmuir adsorption isotherm. The adsorbed film on J55 steel surface containing inhibitor was confirmed by the contact angle, and SEM results. The results obtained showed that the GFE could serve as an effective inhibitor of the corrosion of J55 steel in 3.5% NaCl saturated with CO2.

Research paper thumbnail of Electrochemical and surface studies of some Porphines as corrosion inhibitor for J55 steel in sweet corrosion environment

Applied Surface Science, 2015

Research paper thumbnail of Corrosion mitigation of J55 steel in 3.5% NaCl solution by a macrocyclic inhibitor

Applied Surface Science, 2015

Research paper thumbnail of Use of HPHT autoclave to determine corrosion inhibition effect of poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) on carbon steels in 3.5% NaCl solution saturated with CO2

Chinese Journal of Polymer Science, 2014

ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on cor... more ABSTRACT The influence of poly(methylmethacrylate-co-N-vinyl-2-pyrrolidone), P(MMA-co-VP), on corrosion of carbon steels (J55, N80, P110SS and C110 steels) in 3.5 wt% NaCl solution saturated with CO2 was evaluated using static high pressure and high temperature (HPHT) autoclave. The surface was further evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and contact angle measurements. Quantum chemical calculations have been used to evaluate the structural, electronic and reactivity parameters of the inhibitor on the steels surface. SEM, XRD and contact angle measurement studies reveal that the surface of metals are quite unaffected after use of inhibitor in 3.5% NaCl solution saturated with CO2.

Research paper thumbnail of A study on the inhibition of N80 steel in 3.5% NaCl solution saturated with CO2 by fruit extract of Gingko biloba

Journal of the Taiwan Institute of Chemical Engineers, 2014

The influence of polymer of 2-(methoxycarbonyl)-1-propene (MMA) monomer and poly N-vinyl-2pyrroli... more The influence of polymer of 2-(methoxycarbonyl)-1-propene (MMA) monomer and poly N-vinyl-2pyrrolidone (NVP) monomer namely poly(methyl methacrylate-co-N-vinyl-2-pyrrolidone) or P(MMAco-VP) on corrosion of J55 steel in 3.5 wt.% NaCl solution saturated with CO 2 was evaluated using Fourier transform infrared spectroscopy (FTIR), Tafel polarization, electrochemical impedance spectroscopy (EIS), UV-visible, and scanning electron microscopy (SEM). Results obtained showed that polymer is a mixed type inhibitor as the maximum-E corr displacement is 58 mV. The adsorption of the extract on the J55 steel surface obeyed the Langmuir adsorption isotherm. SEM and UV-visible spectroscopy studies reveal that the surface of metal is quite unaffected after the use of P(MMA-co-VP) in 3.5% NaCl solution saturated with CO 2 .

Research paper thumbnail of Inhibition effect of environmentally benign Kuchla (Strychnos Nuxvomica) seed extract on corrosion of mild steel in hydrochloric acid solution

Rasayan Journal of Chemistry

The inhibition of the corrosion of mild steel in hydrochloric acid solution by the seed extract o... more The inhibition of the corrosion of mild steel in hydrochloric acid solution by the seed extract of Kuchla (Strychnos Nuxvomica) has been studied using weight loss, electrochemical impedance spectroscopy, potentiodynamic polarization and linear polarization techniques. Inhibition was found to increase with increasing concentration of the extract. The effect of temperature, immersion time and acid concentration on the corrosion behavior of mild steel in 1 M HCl with addition of extract was also studied. The adsorption of the extract on the mild steel surface obeyed the Langmuir adsorption isotherm. Values of inhibition efficiency calculated from weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) are in good agreement. Polarization curves showed that Kuchla (Strychnos Nuxvomica) seed extract behaves as a mixed-type inhibitor in hydrochloric acid. The activation energy as well as other thermodynamic parameters for the inhibition process was calculated. The adsorbed film on mild steel surface containing Kuchla (Strychnos Nuxvomica) seed extract inhibitor was also measured by Fourier transform infrared spectroscopy (FTIR). The results obtained showed that the seed extract of Kuchla (Strychnos Nuxvomica) could serve as an effective inhibitor of the corrosion of mild steel in hydrochloric acid media.

Research paper thumbnail of Effect of fruit extracts of some environmentally benign green corrosion inhibitors on corrosion of mild steel in hydrochloric acid solution

Journal of Materials and Environmental Science

The inhibition of the corrosion of mild steel in hydrochloric acid solution by the fruits extract... more The inhibition of the corrosion of mild steel in hydrochloric acid solution by the fruits extract of Shahjan (Moringa oleifera), Pipali (Piper longum) and Orange (Citrus aurantium) has been studied using weight loss, electrochemical impedance spectroscopy, potentiodynamic polarization and linear polarization techniques. Inhibition was found to increase with increasing concentration of the extract. The effect of temperature, immersion time and acid concentration on the corrosion behavior of mild steel in 1 M HCl with addition of extract was also studied. The adsorption of the extract on the mild steel surface obeyed the Langmuir adsorption isotherm. Values of inhibition efficiency calculated from weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) are in good agreement. Polarization curves showed that fruits extract behaves as a mixed-type inhibitor in hydrochloric acid. The activation energy as well as other thermodynamic parameters for the inhibition process was calculated. The adsorbed film on mild steel surface containing fruits extract was also measured by Fourier transform infrared spectroscopy (FTIR). The results obtained showed that the fruits extract could serve as effective inhibitor of the corrosion of mild steel in hydrochloric acid media.

Research paper thumbnail of Azwain (Trachyspermum copticum) seed extract as an efficient corrosion Inhibitor for Aluminium in NaOH solution

The present work investigates corrosion behaviour of the aluminium in 0.5 M NaOH solution in the ... more The present work investigates corrosion behaviour of the aluminium in 0.5 M NaOH solution in the presence of Azwain (Trachyspermum copticum) seed extract by weight loss and electrochemical techniques. Experimental results revealed that inhibition efficiency increases with increasing inhibitor concentration and reached at maximum 94% at 500 ppm inhibitor concentration. Adsorption of inhibitor molecules on the surface of aluminium followed Langmuir adsorption isotherm model. Tafel polarization analyses indicated that studied compound is mixed type inhibitor. The data obtained from polarization method and weight loss methods were in good agreement. The Azwain (Trachyspermum copticum) seed extract is environmental friendly, biodegradable, nontoxic, cheap and easily available source of material which is used as corrosion inhibitor for aluminium metal in 0.5 M NaOH.

Research paper thumbnail of Dapsone: A Novel Corrosion Inhibitor for Mild Steel in Acid Media

The Open Electrochemistry Journal

Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H 2 SO 4 by dapsone were studied by polar... more Corrosion inhibition of mild steel in 1 M HCl and 0.5 M H 2 SO 4 by dapsone were studied by polarization resistance, Tafel polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurement. Results obtained revealed that inhibition occurs through adsorption of the drug on metal surface without modifying the mechanism of corrosion process. Potentiodynamic polarization suggested that it acts as a mixed type predominantly cathodic in HCl and predominantly anodic in H 2 SO 4 . Electrochemical impedance spectroscopy was used to investigate the mechanism of corrosion inhibition. Thermodynamic parameters such as a E ,°a H , °a S , °a ds H were calculated to investigate mechanism of inhibition. The adsorption of dapsone followed Langmuir adsorption isotherm.

Research paper thumbnail of Cetirizine: A New and Effective Corrosion Inhibitor for Mild Steel in 1 M HCl solution

International journal of electrochemical science

Cetirizine was investigated as corrosion inhibitor for mild steel (MS) in 1 M HCl solution by wei... more Cetirizine was investigated as corrosion inhibitor for mild steel (MS) in 1 M HCl solution by weight loss, electrochemical measurements and quantum chemical calculations. Cetirizine showed 95% inhibition efficiency even at very low concentration of 100 ppm. Polarization study indicates that Cetirizine behaves like a mixed type inhibitor. The adsorption of the inhibitor follows Langmuir adsorption isotherm. The quantum chemical calculations were applied to elucidate adsorption pattern of inhibitor molecules on steel surface.

Research paper thumbnail of Experimental and Theoretical Investigation for Inhibition Action and Adsorption Behavior of Montelukast Sodium in 1 M HCl Solution

International journal of electrochemical science

(1-hydroxy-1-methyl-ethyl)phenyl]-propyl]sulfanylmethyl]cyclopropyl]acetic acid sodium salt) for ... more (1-hydroxy-1-methyl-ethyl)phenyl]-propyl]sulfanylmethyl]cyclopropyl]acetic acid sodium salt) for corrosion of mild steel (MS) in 1 M HCl solution was studied by weight loss, electrochemical and quantum chemical methods. Montelukast sodium showed good inhibition efficiency (97% observed at 100 ppm). Polarization study indicated mixed-type nature of the inhibitor. The adsorption of the inhibitor followed Langmuir adsorption isotherm. Quantum chemical calculations provided good support for the adsorption of inhibitor molecules on the mild steel surface. Mechanism of inhibition was further corroborated by the values of activation parameters obtained from the experimental data. Optical microscopy was used to characterize the metal surface before and after adsorption of inhibitor.