Ayssar Nahlé

Verified

Ayssar verified their affiliation via an institutional email.

Learn more

Verified

Ayssar verified their affiliation via an institutional email.

Learn more

• Doctor of Philosophy in Electrochemistry
• Professor (Full) at University of Sharjah

The olive (Oleo europaea L.) may be a broadly dispersed plant that began within the Mediterranean locale. Its natural product is commonly utilized to create olive oil, table olives, and other by-products. Olives are rich in carbohydrates, vitamins, and minerals. Most olive items and the dietary composition of olive oil centering on fatty acids, phe...

The activation energy of thin films polymers made of pure polyethylene oxide (PEO) and PEO doped with sodium iodide (0.1 % wt.) was investigated. The observed physical constants of the casted thin films such as the activation energy (Ea) were determined. The films were prepared by casting method using electricity. The present study investigated the...

This study presents a new method for treating and removing organic pollutants from landfi ll leachate using new components of eco-technology Multi-Layering fi lters (MLFs) coupled with Sulfate Radical-based Advanced Oxidation Processes (SR-AOP). The leachate treatment was carried out using two similar MLF constructed in a laboratory scale. The MLFs...

The corrosion of austenitic stainless steel 316L in 1.0 M sulfuric acid must be investigated and scrutinised using five benzoic acid derivatives [C1(Benzoic acid). This research was performed using potentiodynamic polarization techniques, such as Tafel polarisation curves, electrochemical impedance spectroscopy, and scanning electron microscopy cou...

3-(4-hydroxybutyl)-1-phenethyl-1H-imidazol-3-ium chloride ([HB-Imid] Cl), and 3-(2-chlorobenzyl)-1-phenethyl-1H-imidazol-3-ium chloride ([CB-Imid] Cl) were investigated as corrosion inhibitors for mild steel in 1.0 M hydrochloric acid solution. Electrochemical techniques (PDP and EIS) were performed as experimental studies while DFT at B3LYP 6-311G...

The corrosion of austenitic stainless steel 316L in 1.0 M sulfuric acid must be investigated and scrutinised using five benzoic acid derivatives. This research was performed using potentiodynamic polarisation PDP, such as Tafel polarisation curves TPC, electrochemical impedance spectroscopy EIS, and scanning electron microscopy SEM coupled with ene...

The corrosion inhibition of newly synthesized Schiff base derivatives, namely (E)-3-(1-((2-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMO), (E)-3-(1-((3-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMM), and (E)-3-(1-((4-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMP) was investigated for mild steel,...

In this present work, the theoretical study of the synthesis of methyl 2-(6-hydroxy-3-oxo-3H-xan-then-9-yl) benzoate and ethyl 2-(6-hydroxy-3-oxo-3H-xanthen-9-yl) benzoate, using the Gaussian 09 based on the hybrid density functional theory method (DFT/B3LYP/6-311G (d, p)) was done. From the obtained results, an economical method for the synthesis...

The present paper illustrates the investigation of two novel ecological triazole derivative corrosion inhibitors, namely ethyl 2-(4-phenyl-1H-1,2,3-triazol-1-yl) acetate [Tria-CO2Et], and 2-(4-phenyl-1H-1,2,3-triazol-1-yl) acetohydrazide [Tria-CONHNH2]. The studied inhibitors were investigated against the corrosion of mild steel in 1.0 M HCl soluti...

The inhibition efficiency of benzoic acid (C1), para-hydroxybenzoic acid (C2), and 3,4-dihydroxybenzoic acid (C3) towards enhancing the corrosion resistance of austenitic AISI 316 stainless steel (SS) has been evaluated in 0.5 M HCl using weight loss (WL), open circuit potential (OCP), potentiodynamic polarization method, electrochemical impedance...

The adsorption and corrosion inhibition performance of two benzimidazole derivatives, namely:2-(allylthio)-1H-benzo[d]imidazole (SHA) and bis((1H-benzo[d]imidazol-2-yl)thio)methane (BB1C) were studied as a corrosion inhibitors for mild steel (MS) in 1.0 M HCl solution using Weight Loss (WL) measurements, Potentiodynamic Polarization (PDP), Electroc...

The performance of five synthesised phosphonium salts, 4-tolyltriphenyl-phosphonium chloride (TTPPC), 4-phenoltriphenylphosphonium chloride (PTPPC), 4-anilinetriphenylphosphonium bromide (ATPPB), 4-benzyl alcoholtriphenylphosphonium chloride (BATPPC), 4-hlorophenyltriphenylphosphonium bromide (CPTPPB) and two commercially available phosphonium salt...

Abstract Electrochemically and weight loss measurements were carried out to study the effect of laboratory synthesized 1,4-dimethyl phenyl-N,N-dimethylanilinium dibromide salt (DMPMA) on the corrosion inhibition of mild steel in 1.0M HCl solution containing various concentrations (1.0 × 10−3M to 1.0 × 10−7M) at temperatures ranging from 303 K to 34...

The corrosion inhibition performance of two imidazopyridine derivatives, namely 6-nitroso-2-phenylimidazo[1,2-a]pyridine-3 carbaldehyde (C1) and (2-phenylimidazo[1,2-a]pyridin-3-yl)methanol (C2) for carbon steel in 1.0 M hydrochloric acid solution, was evaluated using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and q...

N1,N2-Bis(1-Phenylethylidene)ethane-1,2-diamine (PEED) was tested as a corrosion inhibitor for C-steel in a 1.0 M HCl solution, by using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results showed that PEED is a very good inhibitor, as its inhibition efficiency reached 93.8 %, with a concentration of...

The importance of the electrical double layer at the interface between a metal and an acid electrolyte together with its interaction with organic and inorganic molecules to produce initially electrostatic adsorption are highlighted. In some cases, a chemical bond is formed involving charge transfer or charge sharing between the metal surface and in...

Cathodic and anodic Tafel extrapolation data for the corrosion inhibition of iron in deaerated 1 M HCl at 22 °C are obtained for five synthesized phosphonium salts, 4-tolyltriphenyl-phosphonium chloride (TTPPC), 4-phenoltriphenylphosphonium chloride (PTPPC), 4-anilinetriphenylphosphonium bromide (ATPPB), 4-benzyl alcoholtriphenylphosphonium chlorid...

In the Middle East, there is no precise data and literature on tobacco-based products, such as dokha and shisha. The proposed study aims to quantify the levels of nicotine and tar in different kinds of dokha and shisha products that are sold in the local marketplace. The amount of nicotine in dokha and shisha products can be quantitatively determin...

Purpose The inhibition effect of (6-phenyl-3-oxopyridazin-2-yl) acetohydrazide (GP4) on the corrosion of mild steel in acidic medium was studied by gravimetric measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS). Design/methodology/approach Weight loss measurements, potentiodynamic tests, and electrochemi...

Purpose The inhibition effect of Foeniculum vulgare seeds (FVS) extract on the corrosion of mild steel in acidic medium was studied using Weight Loss, Electrochemical Impedance Spectroscopy, and Tafel Polarization measurements, as well as the surface morphology of the mild steel. Design/methodology/approach Weight loss measurements, potentiodyna...

The corrosion inhibition efficiency of newly synthesized 3,5-diaryl-4-amino-1,2,4-triazole derivatives was investigated for mild steel corrosion in 1.0 M HCl medium using weight loss quantum chemical calculations and Monte Carlo simulations. It was found that the studied compounds exhibit a very good performance as inhibitors for mild steel corrosi...

The uniform flow generated at moderate rotation speeds, controlled mass transport rate and uniform current distribution make the RCE attractive for turbulent flow studies of corrosion and protection. Controlled flow and mass transport are characterised by peripheral velocity and mass transport coefficient. Important aspects in corrosion include met...

Purpose This paper aims to study the inhibition effect of 2-pyridinealdazine on the corrosion of mild steel in an acidic medium. The inhibition effect was studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization measurements. Design/methodology/approach Weight loss measurements, potentiodynamic tests, electrochemic...

The extract (E) and oil of Melissa Officinalis leaves (EO) have been evaluated as a corrosion inhibitors for carbon steel in 1.0 M HCl solution by means of weight loss measurements, potentio dynamic polarization, and electro chemical impedance spectroscopy (EIS). Tafel polarization study revealed that extract (E) and oil of Melissa Officinalis (EO)...

Abstract The inhibition and the effect of temperature and concentration of 1,4-di(1-vinyl-3- methylimidazolium) benzene dibromide (VMIBB) on the corrosion of mild steel in 1.0 M HCl solution was investigated by electrochemical polarization and weight loss experiments at temperatures ranging from 303 to 343 K. The studied inhibitor concentrations ra...

The aim of this work was to study the effect of gadolinium content on the corrosion behavior of magnesium alloys in 1 wt.% NaCl solution at 21.5 (±0.5) °C. Four Mg-Gd alloys, namely Mg-2 wt.% Gd, Mg-5 wt.% Gd, Mg-10 wt.% Gd, and Mg-15 wt.% Gd, were studied. Weight loss measurements, potentiodynamic tests, electrochemical impedance spectroscopy, XR...

The effect of synthesized 1-vinylimidazolium-3-methyltriphenyl phosphonium dihexafluoroantimonate (VIMTPPF) on the corrosion inhibition of mild steel in 1.0M HCl solution was studied by weight loss measurements. The weight loss measurements were carried out on carbon steel specimens in 1.0M HCl and in 1.0M HCl containing various concentrations (5.0...

The effect of aqueous extract of UAE Scrophularia Arguta (Malisah) on the corrosion inhibition of mild steel in 1.0 M HCl solution was investigated by weight loss experiments at temperatures ranging from 303 to 343 K. The percentage inhibition increased with the increase of the concentration of the inhibitor and decrease with the increase of temper...

The purpose of this paper is to study by weight loss experiments the effect of 1-vinylimidazole-3-phenacyl hexafluoroantimonate salt (VIPFA) on the corrosion inhibition of mild steel in 1.0 M HCl solution. Weight loss measurements were carried out on mild steel specimens in 1.0 M HCl and in 1.0 M HCl containing various concentrations (5.0·10 –4 to...

Purpose – This study aims to study electrochemically and by weight-loss experiments the effect of UAE Rhazya Stricta Decne extract on the corrosion inhibition of mild steel in 1.0 M HCl solution, which will serve researchers in the field of corrosion. Design/methodology/approach – Weight loss measurements were carried out on mild steel specimens i...

Purpose The purpose of this paper is to study electrochemically and by weight loss experiments the effect of P,P′‐Bis (triphenylphosphonio) methyl benzophenone dibromide (TPPMB) on the corrosion inhibition of mild steel in 1.0M HCl solution, which will serve researchers in the field of corrosion. Design/methodology/approach Weight loss measurement...

The corrosion inhibition of mild steel in 1 M HCl solution by a synthesized compound (3-benzoylmethyl benzimidazolium hexafluoroantimonate) was investigated electrochemically and by weight loss experiments. The concentration of this inhibitor ranged from 5 × 10 - 7 M to 5 × 10 - 4 M. The effect of temperature (from 303 to 343 K) and concentrations...

The inhibition and the effect of temperature and concentration of trans-4-hydroxy-4′-stilbazole on the corrosion of mild steel in 1 M HCl solution was investigated by weight loss experiments at temperatures ranging from 303 to 343 K. The studied inhibitor concentrations were between 1 × 10 − 7 M and 1 × 10 − 3 M. The percentage inhibition increased...

The inhibitor effect of two isomers namely 2-(1',5,5'-trimethyl-1H,1'H-3,3'-bipyrazol-1-yl)ethanol (1-TBE) and 2- (1',5,5'-trimethyl-1H,2'H-3,3'-bipyrazol-2-yl)ethanol (2-TBE) on the corrosion of mild steel in 1.0 M hydrochloric acid has been investigated at 308 K using weight loss measurements and electrochemical techniques (impedance spectroscopy...

The effect of aqueous extract of UAE Neem (Azadirachta Indica) on the corrosion inhibition of carbon steel in 1.0 M HCl solution was investigated electrochemically, and by weight-loss experiments at temperatures ranging from 303 to 343 K. The percentage inhibition increased with the increase of the concentration of the inhibitor. At a concentration...

Purpose The purpose of this paper is to study electrochemically and by weight loss experiments the effect of 4‐vinylbenzyl triphenyl phosphonium chloride on the corrosion inhibition of mild steel in 1.0 M HCl solution, which will serve researchers in the field of corrosion. Design/methodology/approach Electrochemical and weight loss measurements w...

Purpose To provide a novel synthesized stilbazole derivative as a corrosion inhibitor for researchers in the field of corrosion science. Design/methodology/approach Electrochemical corrosion measurements (tafel plots) were carried out in a 3‐electrode electrochemical cell on the mild steel electrode in 1.0 M HCl and in 1.0 M HCl containing various...

The inhibition of corrosion of 0.12-carbon steel in 1 M HCl by a series of semicarbazides and thiosemicarbazides was investigated by weight loss experiments at temperatures between 303 and 343K. The inhibitors examined were semicarbazide, 4-phenyl semicarbazide, 4,4-diphenyl semicarbazide, thiosemicarbazide, 4-methyl-3-thiosemicarbazide, 4,4-dimeth...

Electrochemical studies of the inhibition and the effect of a series of semicarbazides and thiosemicarbazides on the corrosion of iron in 1 M HCl were performed. The inhibitors studied were: semicarbazide, 4-phenyl semicarbazide, thiosemicarbazide, 4-methyl-3-thiosemicarbazide, 4,4-dimethyl-3- thiosemicarbazide, 4-ethyl-3-thiosemicarbazide, and 4-a...

The potentiostatic deposition of copper from acid sulfate solutions (0.50 mol dm−3 Na2SO4 at pH 2 and 298 K) was studied at four porosity grades (10, 30, 60 and 100 pores per linear inch, ppi) of reticulated vitreous carbon (RVC) rotating cylinder electrode (RCE). The rate of removal of cupric ions from a 200 cm3 volume of electrolyte was examined...

The electrochemical behavior of solder (60% Pb and 40% Sn) in 5 M NaOH solution was studied and the relationship between the anodic and cathodic peaks was investigated using cyclic voltammetric measurements at various anodic potential limits. The effect of triethanolamine on the electrochemical behavior of solder in NaOH solution was also investiga...

The corrosion behaviour of 0.12 C-steel in 1 M HCl solution and in the presence of a series of quaternary ammonium salts was studied by weight loss measurement at various temperatures ranging from 303 to 343 K. These inhibitors were: tetramethyl ammonium bromide (TMetAB), tetraethyl ammonium bromide (TEthAB), tetrapropyl ammonium bromide (TProAB),...

The need to calculate X-ray absorption losses through window materials and electrolytes in electrochemical cells used for in situ X-ray studies is highlighted. Calculations of the loss of beam intensity through Mylar windows of various thicknesses and at different wavelengths are carried out. Other window materials, such as polyethylene, polyimide...

THE INHIBITION and the effect of concentration of benzyl trimethyl ammonium chloride (BTMAC) and benzyl triethyl ammonium chloride (BTEAC) on the corrosion of iron in 1M HCl were studied electrochemically. The concentration of the inhibitors ranged from 1 × 10-6M to 1 × 10-2M. It was concluded that the percentage inhibition increased with the incre...

The electrochemical behaviour of tin in sodium hydroxide solutions was studied and the relationship between the anodic and cathodic peaks was investigated using cyclic voltammetry at various potential limits. This investigation showed that SnO could be reduced to Sn as long as the electrode has not been passivated by the formation of SnO2. Current...

A rapid electrochemical test for the determination of porosity in electroless nickel coatings on carbon steel is described. The technique is based on the charge under the anodic peaks during the reverse cathodic scan of the cyclic voltammograms for various immersion times (ranging from 0 to 2 hours) of nickel-coated steel samples (0 to 24 μm thickn...

The porosity of Ebonex® electrodes is known to have a marked affect on their electrochemical properties. Atomic force microscopy (AFM) and scanning tunnelling microscopy (STM) have been used to investigate the topography of porous and fully-hardened (nonporous) Ebonex® at high resolution. AFM has also been used to study the early stages of copper e...

THE INHIBITION and the effect of concentration of a series of quaternary ammonium salts on corrosion of iron in 1M HCl solution were electrochemically studied. These inhibitors were: tetramethylammonium bromide, tetraethylammonium bromide, tetrapropylammonium bromide, tetrabutylammonium bromide, tetrapentylammonium bromide, tetrahexylammonium bromi...

Mass transport to rotating cylinder electrodes (radius 0.5 cm and height 1.2 cm) fabricated from reticulated vitreous carbon (RVCRCE) was investigated using linear sweep voltammetry in a 0.5 m Na2SO4 + 1 mm CUSO4 electrolyte at pH 2. At a fixed cupric ion concentration the limiting current was found to be dependent upon velocity to the power 0.55 t...

The inhibition performance and effect of concentration of cetyltrimethyl ammonium bromide and of tetraphenyl phosphonium chloride on the corrosion of Fe in 1M HCl solution were studied electrochemically. The concentrations of the inhibitors ranged from 1×10-6M to 1×10-2M. It was found that the efficiency of corrosion inhibition was 84% with 1×10-2M...

The phosphating of steel in an aqueous zinc-phosphating bath has been studied. Phase formation was controlled potentiostatically, and phase identification was performed by X ray diffraction, using synchrotron radiation, which enabled the time development of phosphate coatings to be studied. Two phases are formed during the phosphating process: hope...

X‐ray diffraction and absorption spectroscopy provide complementary structural tools for the in situ characterization of electrode surfaces. To optimize surface sensitivity, techniques such as glancing angle scattering geometries and spectrum differencing can be employed while the application of synchrotron radiation allows the real‐time collection...

p>The overall aim of the work presented in this thesis is the application of x-ray techniques to the study of surface films formed electrochemically on metals. The techniques studied were X-ray Diffraction (XRD), X-ray Energy Dispersive (XED) and Extended X-ray Absorption edge Fine Structure (EXAFS) and their application was problematic. In order t...