A5052115652- Corrosion Behavior and Inhibition
- Concrete Corrosion and Durability
- Hydrogen embrittlement and corrosion behaviors in metals
- Electrochemical Analysis and Applications
- Inorganic and Organometallic Chemistry
- Synthesis and Biological Evaluation
- Synthesis and properties of polymers
- Advanced oxidation water treatment
- Analytical Chemistry and Sensors
- Water Quality Monitoring and Analysis
- Conducting polymers and applications
- Electrodeposition and Electroless Coatings
- Pesticide and Herbicide Environmental Studies
- Insect and Pesticide Research
- Multicomponent Synthesis of Heterocycles
- Synthesis of Tetrazole Derivatives
- Advanced Physical and Chemical Molecular Interactions
- Synthesis and Characterization of Heterocyclic Compounds
- Epoxy Resin Curing Processes
- Ionic liquids properties and applications
- Material Properties and Applications
- Bioactive Compounds and Antitumor Agents
- Essential Oils and Antimicrobial Activity
- Pesticide Residue Analysis and Safety
- Phytochemical compounds biological activities
Université Ibn-Tofail
2013-2025
Laboratoire de Mathématiques d'Orsay
2012
Quantum chemical calculations based on DFT method were performed three quinoxalines compounds namely ethyl 2-(4-(2-ethoxy-2-oxoethyl)-2-p-tolylquinoxalin-1(4H)-yl)acetate (Q1), 1-[4-acetyl-2-(4-chlorophenyl)quinoxalin-1(4H)-yl]acetone (Q2) and 2-(4-methylphenyl)-1,4-dihydroquinoxaline (Q3), used as corrosion inhibitors for copper in nitric acid media to determine the relationship between molecular structure of inhibition efficiency. parameters such highest occupied orbital energy (EHOMO),...
The inhibition of L-Cysteine Methyl Ester Hydrochloride (L-CMEH) on the corrosion copper in 2M HNO3, was studied by gravimetric method, range temperatures from 303 to 343 K. Results obtained show that L-CMEH acts as inhibitor for HNO3 solution. efficiency found increase with concentration but decreased temperature. assumed occur via adsorption metal surface. onto surface follow Langmuir isotherm. Both kinetic parameters (activation energy, pre-exponential factor, enthalpy activation and...
In the present work, a theoretical study of two quinoxaline-type organic compounds, (2Z)-2-[(3E)-3- (2-oxo-2-phenylethylidene)-3, 4-dihydroquinoxalin-2(1 H)-vlidene|-l phenylethanone (Q5) and (Z)-2- ((E)-3-(2-oxo-2-phenylethylidene)-3, H)-ylidene)-1-phenylethanone (Q6), has been performed using density functional theory (DFT) at B3LYP/6-31G(d) level in order to elucidate different inhibition efficiencies reactive sites these compounds as corrosion inhibitors. The inhibitors global chemical...
The influence of natural occurring extract Chenopodium Ambrosioides (CAE) on the corrosion inhibition carbon steel in sulfuric acid solution is studied by weight loss method, potentiodynamic polarization and impedance spectroscopy (EIS) measurements. experimental results reveal that has a good inhibiting effect metal tested 0.5 M H2SO4 solution. protection efficiency increases with increasing inhibitor concentration to attain 94% at 4 g/l. Potentiodynamic studies clearly it acts essentially...
The corrosion inhibition of 2-(benzylthio)-1,4,5-triphenyl-1H-imidazole (BTI) for carbon steel in a 1 M HCl solution was studied by means weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) methods. Quantum chemical calculations based on the DFT method were performed BTI. Molecular dynamics simulations carried out to establish mechanism with BTI HCl. Kinetic thermodynamic parameters activation using statistical model...
The inhibition ability of a new Azomethine derivatives containing the 8-hydroxyquinoline (BDHQ and MDHQ) towards carbon steel corrosion in HCl solution was studied at various concentrations temperatures using weight loss, polarization curves electrochemical impedance spectroscopy (EIS) methods. experimental results reveal that BDHQ MDHQ are efficient mixed type inhibitors, their efficiencies increase with increasing concentration. adsorption these inhibitors on mild surface obeys Langmuir...
The study aims to synthesize two green pyrazole compounds, N-((1H-pyrazol-1-yl)methyl)-4-nitroaniline (L4) and ethyl 5-methyl-1-(((4-nitrophenyl)amino)methyl)-1H-pyrazole-3-carboxylate (L6), test their action as corrosion inhibitors for carbon steel (CS) in a 1 M HCl solution. Both chemical electrochemical methods, namely, gravimetric measurements (WL), potentiodynamic polarization (PDP), impedance spectroscopy (EIS), were used assess the efficiency of investigated molecules. DFT...
Three quinoxalines named ethyl 2-(4-(2-ethoxy-2-oxoethyl)-2-p-tolylquinoxalin-1(4H)-yl)acetate (Q1), 1-[4-acetyl-2-(4-chlorophenyl)quinoxalin-1(4H)-yl]acetone (Q2) and 2-(4-methylphenyl)-1,4-dihydroquinoxaline (Q3) have been newly synthesised tested as corrosion inhibitors for copper in 2M HNO3. The investigation has conducted at 303K using weight loss measurements, potentiodynamic polarisation electrochemical impedance spectroscopy (EIS) methods). synthesis of quinoxaline functionalized was...
This study examines the use of new imidazolium-based ionic liquids derivatives, namely 3-(3-phenylpropyl)-1-propyl-1H-imidazol-3-ium bromide (PPIB1) and 3-(4-phenoxybutyl)-1-propyl-1H-imidazol-3-ium (PPIB4) for corrosion dissolution protection C38 steel in normal hydrochloric acid solution. The inhibiting efficiency different additives was evaluated by means weight loss electrochemical techniques such as AC impedance measurements polarization curves. experimental results obtained reveal that...
The corrosion inhibitive effects of 2-(4-methylphenyl)-1,4-dihydroquinoxaline (Q1) on carbon steel surface in hydrochloric acid solution was studied using weight loss measurements, electrochemical impedance spectroscopy (EIS), Tafel polarization techniques and quantum chemical approach, the density functional theory (DFT).Inhibition efficiency increased with increase concentration inhibitor.The degree coverage adsorbed inhibitor determined by technique, it found that results obeyed Langmuir...
In this study, the inhibition effect of 3-amino-1,2,4-triazole (ATA) on copper corrosion in 2M HNO3 solution was studied. Electrochemical techniques such as potentiodynamic polarization curves, weight loss (WL) and electrochemical impedance spectroscopy (EIS) were used. Results showed that ATA has good efficiency solution. Polarization measurements indicated that, studied inhibitor acts a mixed type one. The depends concentration reaches 82.2% at 10-2M ATA. results obtained from different...
The 3,5-diamino-1,2,4-triazole (DAT) is investigated as corrosion inhibitor for copper in 2 M HNO3 medium by electrochemical techniques such impedance spectroscopy (EIS) and potentiodynamic polarization curves weight loss measurements. Results show that DAT a good its inhibition efficiency increases increasing the concentration. Changes parameters were indicative of adsorption on surface, leading to formation protective films. Tafel study revealed acts mixed type inhibitor. process...
A new Azomethine derivative namely 5-(((4-hydroxybenzylidene)amino)methyl)quinolin-8-ol (HBHQ) was synthesized and identified by different spectroscopic methods.The product assessed in the inhibition of corrosion carbon steel (CS) 1 M HCl using Tafel polarization, weight loss electrochemical impedance spectroscopy.Their property anticorrosion is relative concentrations achieved 92% at optimum concentration 10 -3 M. Polarization studies showed that newly inhibitor mixed type nature.The EIS...
The present research demonstrates an innovative investigation of a new pyrazol derivative (2-benzoyl-4-nitro-N-[(1H-pyrazol-1-yl)methyl]aniline (BNPMA)) as inhibitor carbon steel corrosion in molar hydrochloric acid. A variety methods and techniques were used our to assess inhibition, including weight loss measurements (WL), electrochemical trials like potentiodynamic polarization (PDP) impedance spectroscopy (EIS), surface analysis such scanning electron microscope coupled with...
The inhibition of the corrosion carbon steel in 1 M HCl by Phenolphthalein (Ph) has been investigated relation to concentration inhibitor as well temperature using weight loss and electrochemical measurements. effect on behaviour with addition optimal Ph was studied range 298-323K. Polarisation curves reveal that is a mixed type inhibitor. value efficiency decreases slightly increase temperature. Changes impedance parameters (charge transfer resistance, Rt, double layer capacitance, Cdl)...