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M Lagrenee - One of the best experts on this subject based on the ideXlab platform.
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inhibiting effects of some oxadiazole derivatives on the corrosion of mild steel in perchloric acid solution
Applied Surface Science, 2005Co-Authors: Mounim Lebrini, Fouad Bentiss, Herve Vezin, M LagreneeAbstract:Abstract The efficiency of 3,5-bis( n -pyridyl)-1,3,4-oxadiazole ( n -POX, n = 1, 2, 3), as corrosion inhibitors for mild steel in 1 M perchloric acid (HClO 4 ) have been determined by weight loss measurements and electrochemical studies. The results show that these inhibitors revealed a good corrosion inhibition even at very low concentrations. Comparison of results among those obtained by the studied oxadiazoles shows that 3-POX was the best inhibitor. Polarisation curves indicate that n -pyridyl substituted-1,3,4-oxadiazoles are mixed type inhibitors in 1 M HClO 4 . The adsorption of these inhibitors follows a Langmuir isotherm model. The electronic properties of n -POX, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR).
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Electrochemical and quantum chemical studies of new thiadiazole derivatives adsorption on mild steel in normal hydrochloric acid medium
Corrosion Science, 2005Co-Authors: Mounim Lebrini, M Lagrenee, Herve Vezin, Léon Gengembre, Fouad BentissAbstract:Abstract In this work, a new class of thiadiazole derivatives, namely 3,5-bis(2-thienyl)-1,3,4-thiadiazole (2-TTH) and 3,5-bis(3-thienyl)-1,3,4-thiadiazole (3-TTH), have been studied as possible corrosion inhibitors for mild steel in molar hydrochloric acid (1 M HCl). Weight loss measurements, polarisation curves and AC impedance methods have been used. These studies have shown that the thiadiazole derivatives were very good inhibitors for mild steel in 1 M HCl. Comparison of results showed that 3-TTH was the best inhibitor. The potential of zero charge (PZC) of mild steel was studied by AC impedance method, and the mechanism of adsorption has been predicted. X-ray photoelectron spectroscopy surface analysis with thiadiazole derivatives shows that it chemisorbed at the mild steel/HCl interface. The adsorption of these inhibitors followed Langmuir’s adsorption isotherm. The electronic properties of 2-TTH and 3-TTH, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR). These inhibitors are considered as non-cytotoxic substances.
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2 5 bis 4 dimethylaminophenyl 1 3 4 oxadiazole and 2 5 bis 4 dimethylaminophenyl 1 3 4 thiadiazole as corrosion inhibitors for mild steel in acidic media
Corrosion Science, 2004Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, H F Hildebrand, M LagreneeAbstract:Abstract 2,5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4-dimethylaminophenyl)-1,3,4-thiadiazole (DAPT) have been synthesised and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques. At constant acid concentration, the inhibitor efficiency of both the compounds is found to increase with inhibitor concentration. DAPT is slightly more efficient in 0.5 M H 2 SO 4 than in 1 M HCl whereas DAPO is more efficient in 1 M HCl. Of the two, DAPT appears to be a better inhibitor. Potentiostatic polarisation studies show that both are mixed-type inhibitors in 1 M HCl but cathodic-type in 0.5 M H 2 SO 4 . The inhibitors function through adsorption following Langmuir isotherm in both the acids. The electronic properties of DAPO and DAPT, obtained using the AM1 semi-empirical quantum chemical approach, have been correlated with their experimental inhibition efficiencies using the Linear Resistance model (LR). These inhibitors are considered as a non-cytotoxic substances.
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Linear Resistance model of the inhibition mechanism of steel in hcl by triazole and oxadiazole derivatives structure activity correlations
Corrosion Science, 2003Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, M LagreneeAbstract:A quantum chemical study of the corrosion inhibition efficiency of triazole and oxadiazole derivatives, at the mild steel electrode, in molar hydrochloric acid (1 M HCl) was carried out. The correlation between the molecular structure and inhibition efficiency of these heterocyclic compounds was investigated using a Linear model encompassing the charge transfer Resistance (Rt). The Linear Resistance model was optimised with the semi-empirical quantitative structure–activity relationships approach. Regression equations, with multiple correlation coefficients superior at 0.90, were derived between 1/Rt and molecular descriptors. These significant correlations indicated that the variation of the corrosion inhibition with the structure of the inhibitors may be explained in terms of electronic properties.
Fouad Bentiss - One of the best experts on this subject based on the ideXlab platform.
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inhibiting effects of some oxadiazole derivatives on the corrosion of mild steel in perchloric acid solution
Applied Surface Science, 2005Co-Authors: Mounim Lebrini, Fouad Bentiss, Herve Vezin, M LagreneeAbstract:Abstract The efficiency of 3,5-bis( n -pyridyl)-1,3,4-oxadiazole ( n -POX, n = 1, 2, 3), as corrosion inhibitors for mild steel in 1 M perchloric acid (HClO 4 ) have been determined by weight loss measurements and electrochemical studies. The results show that these inhibitors revealed a good corrosion inhibition even at very low concentrations. Comparison of results among those obtained by the studied oxadiazoles shows that 3-POX was the best inhibitor. Polarisation curves indicate that n -pyridyl substituted-1,3,4-oxadiazoles are mixed type inhibitors in 1 M HClO 4 . The adsorption of these inhibitors follows a Langmuir isotherm model. The electronic properties of n -POX, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR).
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Electrochemical and quantum chemical studies of new thiadiazole derivatives adsorption on mild steel in normal hydrochloric acid medium
Corrosion Science, 2005Co-Authors: Mounim Lebrini, M Lagrenee, Herve Vezin, Léon Gengembre, Fouad BentissAbstract:Abstract In this work, a new class of thiadiazole derivatives, namely 3,5-bis(2-thienyl)-1,3,4-thiadiazole (2-TTH) and 3,5-bis(3-thienyl)-1,3,4-thiadiazole (3-TTH), have been studied as possible corrosion inhibitors for mild steel in molar hydrochloric acid (1 M HCl). Weight loss measurements, polarisation curves and AC impedance methods have been used. These studies have shown that the thiadiazole derivatives were very good inhibitors for mild steel in 1 M HCl. Comparison of results showed that 3-TTH was the best inhibitor. The potential of zero charge (PZC) of mild steel was studied by AC impedance method, and the mechanism of adsorption has been predicted. X-ray photoelectron spectroscopy surface analysis with thiadiazole derivatives shows that it chemisorbed at the mild steel/HCl interface. The adsorption of these inhibitors followed Langmuir’s adsorption isotherm. The electronic properties of 2-TTH and 3-TTH, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR). These inhibitors are considered as non-cytotoxic substances.
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2 5 bis 4 dimethylaminophenyl 1 3 4 oxadiazole and 2 5 bis 4 dimethylaminophenyl 1 3 4 thiadiazole as corrosion inhibitors for mild steel in acidic media
Corrosion Science, 2004Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, H F Hildebrand, M LagreneeAbstract:Abstract 2,5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4-dimethylaminophenyl)-1,3,4-thiadiazole (DAPT) have been synthesised and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques. At constant acid concentration, the inhibitor efficiency of both the compounds is found to increase with inhibitor concentration. DAPT is slightly more efficient in 0.5 M H 2 SO 4 than in 1 M HCl whereas DAPO is more efficient in 1 M HCl. Of the two, DAPT appears to be a better inhibitor. Potentiostatic polarisation studies show that both are mixed-type inhibitors in 1 M HCl but cathodic-type in 0.5 M H 2 SO 4 . The inhibitors function through adsorption following Langmuir isotherm in both the acids. The electronic properties of DAPO and DAPT, obtained using the AM1 semi-empirical quantum chemical approach, have been correlated with their experimental inhibition efficiencies using the Linear Resistance model (LR). These inhibitors are considered as a non-cytotoxic substances.
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Linear Resistance model of the inhibition mechanism of steel in hcl by triazole and oxadiazole derivatives structure activity correlations
Corrosion Science, 2003Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, M LagreneeAbstract:A quantum chemical study of the corrosion inhibition efficiency of triazole and oxadiazole derivatives, at the mild steel electrode, in molar hydrochloric acid (1 M HCl) was carried out. The correlation between the molecular structure and inhibition efficiency of these heterocyclic compounds was investigated using a Linear model encompassing the charge transfer Resistance (Rt). The Linear Resistance model was optimised with the semi-empirical quantitative structure–activity relationships approach. Regression equations, with multiple correlation coefficients superior at 0.90, were derived between 1/Rt and molecular descriptors. These significant correlations indicated that the variation of the corrosion inhibition with the structure of the inhibitors may be explained in terms of electronic properties.
Herve Vezin - One of the best experts on this subject based on the ideXlab platform.
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inhibiting effects of some oxadiazole derivatives on the corrosion of mild steel in perchloric acid solution
Applied Surface Science, 2005Co-Authors: Mounim Lebrini, Fouad Bentiss, Herve Vezin, M LagreneeAbstract:Abstract The efficiency of 3,5-bis( n -pyridyl)-1,3,4-oxadiazole ( n -POX, n = 1, 2, 3), as corrosion inhibitors for mild steel in 1 M perchloric acid (HClO 4 ) have been determined by weight loss measurements and electrochemical studies. The results show that these inhibitors revealed a good corrosion inhibition even at very low concentrations. Comparison of results among those obtained by the studied oxadiazoles shows that 3-POX was the best inhibitor. Polarisation curves indicate that n -pyridyl substituted-1,3,4-oxadiazoles are mixed type inhibitors in 1 M HClO 4 . The adsorption of these inhibitors follows a Langmuir isotherm model. The electronic properties of n -POX, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR).
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Electrochemical and quantum chemical studies of new thiadiazole derivatives adsorption on mild steel in normal hydrochloric acid medium
Corrosion Science, 2005Co-Authors: Mounim Lebrini, M Lagrenee, Herve Vezin, Léon Gengembre, Fouad BentissAbstract:Abstract In this work, a new class of thiadiazole derivatives, namely 3,5-bis(2-thienyl)-1,3,4-thiadiazole (2-TTH) and 3,5-bis(3-thienyl)-1,3,4-thiadiazole (3-TTH), have been studied as possible corrosion inhibitors for mild steel in molar hydrochloric acid (1 M HCl). Weight loss measurements, polarisation curves and AC impedance methods have been used. These studies have shown that the thiadiazole derivatives were very good inhibitors for mild steel in 1 M HCl. Comparison of results showed that 3-TTH was the best inhibitor. The potential of zero charge (PZC) of mild steel was studied by AC impedance method, and the mechanism of adsorption has been predicted. X-ray photoelectron spectroscopy surface analysis with thiadiazole derivatives shows that it chemisorbed at the mild steel/HCl interface. The adsorption of these inhibitors followed Langmuir’s adsorption isotherm. The electronic properties of 2-TTH and 3-TTH, obtained using the AM1 semi-empirical quantum chemical approach, were correlated with their experimental efficiencies using the Linear Resistance model (LR). These inhibitors are considered as non-cytotoxic substances.
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2 5 bis 4 dimethylaminophenyl 1 3 4 oxadiazole and 2 5 bis 4 dimethylaminophenyl 1 3 4 thiadiazole as corrosion inhibitors for mild steel in acidic media
Corrosion Science, 2004Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, H F Hildebrand, M LagreneeAbstract:Abstract 2,5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4-dimethylaminophenyl)-1,3,4-thiadiazole (DAPT) have been synthesised and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques. At constant acid concentration, the inhibitor efficiency of both the compounds is found to increase with inhibitor concentration. DAPT is slightly more efficient in 0.5 M H 2 SO 4 than in 1 M HCl whereas DAPO is more efficient in 1 M HCl. Of the two, DAPT appears to be a better inhibitor. Potentiostatic polarisation studies show that both are mixed-type inhibitors in 1 M HCl but cathodic-type in 0.5 M H 2 SO 4 . The inhibitors function through adsorption following Langmuir isotherm in both the acids. The electronic properties of DAPO and DAPT, obtained using the AM1 semi-empirical quantum chemical approach, have been correlated with their experimental inhibition efficiencies using the Linear Resistance model (LR). These inhibitors are considered as a non-cytotoxic substances.
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Linear Resistance model of the inhibition mechanism of steel in hcl by triazole and oxadiazole derivatives structure activity correlations
Corrosion Science, 2003Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, M LagreneeAbstract:A quantum chemical study of the corrosion inhibition efficiency of triazole and oxadiazole derivatives, at the mild steel electrode, in molar hydrochloric acid (1 M HCl) was carried out. The correlation between the molecular structure and inhibition efficiency of these heterocyclic compounds was investigated using a Linear model encompassing the charge transfer Resistance (Rt). The Linear Resistance model was optimised with the semi-empirical quantitative structure–activity relationships approach. Regression equations, with multiple correlation coefficients superior at 0.90, were derived between 1/Rt and molecular descriptors. These significant correlations indicated that the variation of the corrosion inhibition with the structure of the inhibitors may be explained in terms of electronic properties.
Michel Traisnel - One of the best experts on this subject based on the ideXlab platform.
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2 5 bis 4 dimethylaminophenyl 1 3 4 oxadiazole and 2 5 bis 4 dimethylaminophenyl 1 3 4 thiadiazole as corrosion inhibitors for mild steel in acidic media
Corrosion Science, 2004Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, H F Hildebrand, M LagreneeAbstract:Abstract 2,5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4-dimethylaminophenyl)-1,3,4-thiadiazole (DAPT) have been synthesised and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques. At constant acid concentration, the inhibitor efficiency of both the compounds is found to increase with inhibitor concentration. DAPT is slightly more efficient in 0.5 M H 2 SO 4 than in 1 M HCl whereas DAPO is more efficient in 1 M HCl. Of the two, DAPT appears to be a better inhibitor. Potentiostatic polarisation studies show that both are mixed-type inhibitors in 1 M HCl but cathodic-type in 0.5 M H 2 SO 4 . The inhibitors function through adsorption following Langmuir isotherm in both the acids. The electronic properties of DAPO and DAPT, obtained using the AM1 semi-empirical quantum chemical approach, have been correlated with their experimental inhibition efficiencies using the Linear Resistance model (LR). These inhibitors are considered as a non-cytotoxic substances.
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Linear Resistance model of the inhibition mechanism of steel in hcl by triazole and oxadiazole derivatives structure activity correlations
Corrosion Science, 2003Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, M LagreneeAbstract:A quantum chemical study of the corrosion inhibition efficiency of triazole and oxadiazole derivatives, at the mild steel electrode, in molar hydrochloric acid (1 M HCl) was carried out. The correlation between the molecular structure and inhibition efficiency of these heterocyclic compounds was investigated using a Linear model encompassing the charge transfer Resistance (Rt). The Linear Resistance model was optimised with the semi-empirical quantitative structure–activity relationships approach. Regression equations, with multiple correlation coefficients superior at 0.90, were derived between 1/Rt and molecular descriptors. These significant correlations indicated that the variation of the corrosion inhibition with the structure of the inhibitors may be explained in terms of electronic properties.
H F Hildebrand - One of the best experts on this subject based on the ideXlab platform.
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2 5 bis 4 dimethylaminophenyl 1 3 4 oxadiazole and 2 5 bis 4 dimethylaminophenyl 1 3 4 thiadiazole as corrosion inhibitors for mild steel in acidic media
Corrosion Science, 2004Co-Authors: Fouad Bentiss, Herve Vezin, Michel Traisnel, H F Hildebrand, M LagreneeAbstract:Abstract 2,5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4-dimethylaminophenyl)-1,3,4-thiadiazole (DAPT) have been synthesised and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques. At constant acid concentration, the inhibitor efficiency of both the compounds is found to increase with inhibitor concentration. DAPT is slightly more efficient in 0.5 M H 2 SO 4 than in 1 M HCl whereas DAPO is more efficient in 1 M HCl. Of the two, DAPT appears to be a better inhibitor. Potentiostatic polarisation studies show that both are mixed-type inhibitors in 1 M HCl but cathodic-type in 0.5 M H 2 SO 4 . The inhibitors function through adsorption following Langmuir isotherm in both the acids. The electronic properties of DAPO and DAPT, obtained using the AM1 semi-empirical quantum chemical approach, have been correlated with their experimental inhibition efficiencies using the Linear Resistance model (LR). These inhibitors are considered as a non-cytotoxic substances.