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Mumtaz A. Quraishi - One of the best experts on this subject based on the ideXlab platform.
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Adsorption properties and inhibition of mild steel corrosion in hydrochloric acid solution by ceftobiprole
Journal of Applied Electrochemistry, 2011Co-Authors: Ashish Kumar Singh, Mumtaz A. QuraishiAbstract:The inhibition effect of ceftobiprole against the corrosion of mild steel in 1 M HCl solution was studied by weight loss, electrochemical impedance spectroscopy (EIS), Potentiodynamic Polarization and atomic force microscopy techniques. Inhibition efficiency increased with inhibitor concentration where as decreased with acid concentration. Data obtained from EIS studies were analyzed to model the corrosion inhibition process through appropriate equivalent circuit models. The adsorption of ceftobiprole obeyed Langmuir adsorption isotherm. Both thermodynamic and activation parameters were calculated and discussed. Polarization curves indicated that they are mixed type of inhibitors. Polarization curves showed that ceftobiprole act as mixed-type inhibitor. The results obtained from weight loss, EIS and Potentiodynamic Polarization are in good agreement.
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inhibition of mild steel corrosion in acid solution by pheniramine drug experimental and theoretical study
Corrosion Science, 2010Co-Authors: Ishtiaque Ahamad, Rajendra Prasad, Mumtaz A. QuraishiAbstract:Inhibition of mild steel corrosion in 1 M HCl solution by Pheniramine drug was studied using weight loss, electrochemical impedance spectroscopy, linear Polarization resistance, and Potentiodynamic Polarization measurements. The values of activation energy (Ea) and different thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads°), adsorption enthalpy (ΔHads°) and adsorption entropy (ΔSads°) were calculated and discussed. The adsorption process of studied drug on mild steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic Polarization measurements showed that Pheniramine is mixed-type inhibitor. Further, theoretical calculations were carried out and relations between computed parameters and experimental inhibition efficiency were discussed.
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inhibition of mild steel corrosion in acid solution by pheniramine drug experimental and theoretical study
Corrosion Science, 2010Co-Authors: Ishtiaque Ahamad, Rajendra Prasad, Mumtaz A. QuraishiAbstract:Inhibition of mild steel corrosion in 1 M HCl solution by Pheniramine drug was studied using weight loss, electrochemical impedance spectroscopy, linear Polarization resistance, and Potentiodynamic Polarization measurements. The values of activation energy (Ea) and different thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads°), adsorption enthalpy (ΔHads°) and adsorption entropy (ΔSads°) were calculated and discussed. The adsorption process of studied drug on mild steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic Polarization measurements showed that Pheniramine is mixed-type inhibitor. Further, theoretical calculations were carried out and relations between computed parameters and experimental inhibition efficiency were discussed.
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inhibitive effect of diethylcarbamazine on the corrosion of mild steel in hydrochloric acid
Corrosion Science, 2010Co-Authors: Ashish Kumar Singh, Mumtaz A. QuraishiAbstract:Abstract Potentiodynamic Polarization, electrochemical impedance spectroscopy (EIS), weight loss measurements and atomic force microscopy techniques were used to investigate the inhibitory effect of diethylcarbamazine (DECM) on corrosion of mild steel in HCl solution. The inhibitor showed >90% inhibition efficiency at 5.01 × 10−4 M. Results obtained revealed that inhibition occurs through adsorption of inhibitor molecules on metal surface without modifying the mechanism of corrosion process. Potentiodynamic Polarization studies suggested that it is a mixed type inhibitor, predominantly controls cathodic reaction. Activation parameters ( E a , Δ H and Δ S ) and thermodynamic parameters ( Δ G ads o , Δ H ads o and Δ S ads o ) were calculated to investigate mechanism of inhibition.
M A Quraishi - One of the best experts on this subject based on the ideXlab platform.
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synthesis and investigation of pyran derivatives as acidizing corrosion inhibitors for n80 steel in hydrochloric acid theoretical and experimental approaches
Journal of Alloys and Compounds, 2018Co-Authors: Ambrish Singh, M A Quraishi, K R Ansari, Hassane Lgaz, Yuanhua LinAbstract:Abstract The corrosion inhibition performance of pyran derivatives (AP) on N80 steel in 15% HCl was investigated by electrochemical impedance spectroscopy (EIS), Potentiodynamic Polarization, weight loss, contact angle and scanning electron microscopy (SEM) measurements, DFT and molecular dynamic simulation. The adsorption of APs on the surface of N80 steel obeyed Langmuir isotherm. Potentiodynamic Polarization study confirmed that inhibitors are mixed type with cathodic predominance. Molecular dynamic simulation was applied to search for most stable configuration and adsorption energies for the interaction of the inhibitors with Fe (110) surface. The theoretical data obtained are in most cases in agreement with experimental results.
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electrochemical and theoretical investigation of triazole derivatives on corrosion inhibition behavior of copper in hydrochloric acid medium
Corrosion Science, 2013Co-Authors: M A QuraishiAbstract:Abstract The inhibition effect of three triazole derivatives namely 4-amino-4 H -1,2,4-triazole-3thiol (ATT), 4-amino-5-methyl-4 H -1,2,4-triazole-3thiol (AMTT) and 4-amino-5-ethyl-4 H -1,2,4-triazole-3thiol (AETT) have been investigated against the corrosion of copper in 0.5 M HCl solution. The investigations were analyzed using Potentiodynamic Polarization, electrochemical impedance, weight loss methods and quantum chemical studies. Potentiodynamic Polarization measurements indicate that all three examined compounds are cathodic type inhibitors. Among the studied compounds, 4-amino-5-ethyl-4 H -1,2,4-triazole-3thiol exhibited the best inhibition efficiency 96.09% at 2.58 mM. The adsorption of these compounds obeyed the Langmuir adsorption isotherm. The electronic properties obtained using quantum chemical approach, were correlated with the experimental results.
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Inhibition of mild steel corrosion by oleochemical based hydrazides
Indian Journal of Chemical Technology, 2005Co-Authors: M A Quraishi, Nidhi Saxena, D. JamalAbstract:Selected hydrazides of fatty acids with C9–C17 carbon atoms have been synthesized and evaluated as corrosion inhibitors of mild steel (MS) in hydrochloric acid (HCl) solutions by weight loss and Potentiodynamic Polarization methods. The adsorption of all the hydrazides on mild steel surface in the acid solution has been found to obey Langmuir's adsorption isotherm. The Potentiodynamic Polarization studies revealed that all compounds block the corrosion reactions. Inhibition efficiency (IE) of these compounds has been found to vary with the concentration of the compound, solution temperature, immersion time and concentration of the acid solution. The values of activation energy (Ea) and free energy of adsorption (ΔGads) have been calculated to investigate the mechanism of the corrosion inhibition.
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4 amino 3 butyl 5 mercapto 1 2 4 triazole a new corrosion inhibitor for mild steel in sulphuric acid
Materials Chemistry and Physics, 2003Co-Authors: M A Quraishi, Hariom K SharmaAbstract:Abstract A new corrosion inhibitor namely 4-amino-3-butyl-5-mercapto-1,2,4-triazole (ABMT) has been synthesized and its inhibitive performance towards the corrosion of mild steel in 1 N sulphuric acid (H 2 SO 4 ) investigated by weight loss and Potentiodynamic Polarization techniques. Potentiodynamic Polarization measurements clearly reveal that the investigated inhibitor is of mixed type. The adsorption of the inhibitor on the metal surface in the acid solution was found to obey Temkin’s adsorption isotherm. The influence of temperature, immersion time and acid concentration was also studied in the presence of ABMT in H 2 SO 4 .
Ishtiaque Ahamad - One of the best experts on this subject based on the ideXlab platform.
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inhibition of mild steel corrosion in acid solution by pheniramine drug experimental and theoretical study
Corrosion Science, 2010Co-Authors: Ishtiaque Ahamad, Rajendra Prasad, Mumtaz A. QuraishiAbstract:Inhibition of mild steel corrosion in 1 M HCl solution by Pheniramine drug was studied using weight loss, electrochemical impedance spectroscopy, linear Polarization resistance, and Potentiodynamic Polarization measurements. The values of activation energy (Ea) and different thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads°), adsorption enthalpy (ΔHads°) and adsorption entropy (ΔSads°) were calculated and discussed. The adsorption process of studied drug on mild steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic Polarization measurements showed that Pheniramine is mixed-type inhibitor. Further, theoretical calculations were carried out and relations between computed parameters and experimental inhibition efficiency were discussed.
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inhibition of mild steel corrosion in acid solution by pheniramine drug experimental and theoretical study
Corrosion Science, 2010Co-Authors: Ishtiaque Ahamad, Rajendra Prasad, Mumtaz A. QuraishiAbstract:Inhibition of mild steel corrosion in 1 M HCl solution by Pheniramine drug was studied using weight loss, electrochemical impedance spectroscopy, linear Polarization resistance, and Potentiodynamic Polarization measurements. The values of activation energy (Ea) and different thermodynamic parameters such as adsorption equilibrium constant (Kads), free energy of adsorption (ΔGads°), adsorption enthalpy (ΔHads°) and adsorption entropy (ΔSads°) were calculated and discussed. The adsorption process of studied drug on mild steel surface obeys the Langmuir adsorption isotherm. Potentiodynamic Polarization measurements showed that Pheniramine is mixed-type inhibitor. Further, theoretical calculations were carried out and relations between computed parameters and experimental inhibition efficiency were discussed.
Pyungyeon Cho - One of the best experts on this subject based on the ideXlab platform.
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passivity breakdown of 316l stainless steel during Potentiodynamic Polarization in nacl solution
Corrosion Science, 2016Co-Authors: Sara Al Saadi, Pyungyeon Cho, Changheui Jang, P A BeeleyAbstract:Abstract Time-of-flight secondary ion mass spectroscopy (ToF SIMS) analysis was performed on 316L stainless steel polarized Potentiodynamically up to different potentials in NaCl solution. The surface film thickness increased with the ending potential of the Potentiodynamic Polarization, when estimated by the oxygen ion depth profiles. The chloride ion intensities at the film/metal interface were correlated with the ending potentials during the Potentiodynamic Polarization and cumulative anodic charge densities that govern the pit initiation. The results and analysis support the passivity breakdown mechanisms considering the role of chloride ions at the metal/film interface, rather than at the film/solution interface.
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Potentiodynamic Polarization behaviour of aisi type 316 stainless steel in nacl solution
Corrosion Science, 2013Co-Authors: Pyungyeon Cho, Al A Zaabi, Yacine Addad, Changheui JangAbstract:Abstract Potentiodynamic Polarization behaviour of AISI type 316 SS in NaCl solution was investigated in terms of the potential scan rate effect. The critical pitting potential, E pit , of the stainless steel appeared to be strongly dependent on the potential scan rate. A cumulative anodic electric charge density of the steel was defined as the total charge density from the open circuit potential, E ocp , and calculated using the Potentiodynamic Polarization curves. It was found that, plotted as a function of the Polarization time, the values of the cumulative charge density consisted of two lines with different slopes. It was confirmed that the deflection of the cumulative charge density vs. time plots corresponded to E pit and the values of the cumulative charge density at the deflection were little dependent on the applied scan rate. The cumulative charge density at the deflection was defined as a critical electric charge density for the stable pitting. Also, it was suggested that this electric charge density should be associated with the critical condition for the stable pitting and the critical electric charge for stable pitting should be a representative parameter for the pitting resistance of a material.
Y Song - One of the best experts on this subject based on the ideXlab platform.
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effects of scan rate on the Potentiodynamic Polarization curve obtained to determine the tafel slopes and corrosion current density
Corrosion Science, 2009Co-Authors: Xuelin Zhang, Zh H Jiang, Y Song, Zh D WuAbstract:Effects of charging current on the Potentiodynamic Polarization curve that is obtained to determine the Tafel slopes and corrosion current density are reported in this paper. The Potentiodynamic Polarization curves are obtained at different scan rates for Ti6Al4V in naturally aerated 3.5% NaCl solution. The results show that the potential where the external current density equals to zero does not equal to the open circuit potential. The extent of the distortion of the Polarization curve can be reflected the difference between the two potentials. Some significant errors are introduced into the values of the corrosion current density and Tafel slopes due to this distortion. In addition, severe distortion of the Polarization curve can lead to misunderstanding of the electrode process. A new method is adopted to eliminate this distortion, and the potential-dependent of charging current density can also be obtained.
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effects of scan rate on the Potentiodynamic Polarization curve obtained to determine the tafel slopes and corrosion current density
Corrosion Science, 2009Co-Authors: Xuelin Zhang, Zh H Jiang, Zh P Yao, Y SongAbstract:Effects of charging current on the Potentiodynamic Polarization curve that is obtained to determine the Tafel slopes and corrosion current density are reported in this paper. The Potentiodynamic Polarization curves are obtained at different scan rates for Ti6Al4V in naturally aerated 3.5% NaCl solution. The results show that the potential where the external current density equals to zero does not equal to the open circuit potential. The extent of the distortion of the Polarization curve can be reflected the difference between the two potentials. Some significant errors are introduced into the values of the corrosion current density and Tafel slopes due to this distortion. In addition, severe distortion of the Polarization curve can lead to misunderstanding of the electrode process. A new method is adopted to eliminate this distortion, and the potential-dependent of charging current density can also be obtained.
