Electrochemical Impedance spectroscopy (EIS) and study of iron corrosion inhibition by turmeric roots Extract (TRE) in hydrochloric acid solution

Almzarzie, Kholod; Falah, Ahmad; Massri, Ayman; Kellawi, Hassan

doi:10.21608/ejchem.2018.5295.1476

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…These observations imply that the corrosion mechanism in our system was governed by a definite charge transfer procedure. 51,52 Observed depressed semicircular loops point to a nonideal capacitor performance at the corrodent/metal boundary. 53 Also, the sizes of the semicircles were directly proportional to the concentration of the inhibitors, entailing a uniform corrosion resistance vis-a-vis decrease in corrosion rate as the concentration of the inhibitors increases.…”

Section: Pdp Measurementsmentioning

confidence: 98%

Formamidine-Based Thiuram Disulfides as Efficient Inhibitors of Acid Corrosion of Mild Steel: Electrochemical, Surface, and Density Functional Theory/Monte Carlo Simulation Studies

et al. 2022

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Electrochemical, surface, and density functional theory (DFT)/Monte Carlo (MC) simulation studies were used in investigating the characteristics of N , N ′-(disulfanne-1,2-dicarbonothioyl)bis( N , N ′-bis(2,6-dimethylphenyl)formimidamide) ( DS1 ), N , N ′-(disulfanne-1,2-dicarbonothioyl)bis( N , N ′-bis(2,6-diisopropylphenyl)formimidamide) ( DS2 ), N , N ′-(disulfanne-1,2-dicarbonothioyl)bis( N , N ′-dimesitylformimidamide) ( DS3 ), and N , N ′-(disulfanne-1,2-dicarbonothioyl)bis( N , N ′-bis(2,6-dichlorophenyl)formimidamide) ( DS4 ) as inhibitors of acid corrosion of mild steel. The inhibitors were found to effectively reduce the rates of steel dissolution at the anode as well as cathodic hydrogen evolution. The order of inhibition efficiencies of studied compounds is DS1 (PDP/LPR/EIS: 98.60/97.98/96.94%) > DS2 (PDP/LPR/EIS: 98.36/96.86/96.90%) > DS3 (PDP/LPR/EIS: 94.66/87.44/94.30%) > DS4 (PDP/LPR/EIS: 83.57/77.02/75.17%) at 1.00 mM, and the overall efficiencies appeared to depend on the molecular and electronic structures of the compounds. The compounds offered high resistance to charge transfer across the electrode/electrolyte system by forming adsorbed film whose resistance increased with an increase in concentration. Findings suggested that the adsorption process involved combined chemisorption and physisorption. DFT calculations and MC simulations provided theoretical justifications for the experimental results.

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Section: Pdp Measurementsmentioning

confidence: 98%

Formamidine-Based Thiuram Disulfides as Efficient Inhibitors of Acid Corrosion of Mild Steel: Electrochemical, Surface, and Density Functional Theory/Monte Carlo Simulation Studies

et al. 2022

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“…The degree of inhibition may depend on a variety of parameters, including the reactivity of the substituents in aromatic rings, the electron density, the functional groups, the composition of the corrosive media, and the charges on the substrate surface 71 . According to the literature, adsorption can occur physically or chemically between the inhibitor and the C-steel surface.…”

Section: Inhibition Mechanism Of Corrosionmentioning

confidence: 99%

Corrosion protection of carbon steel by methoxy naphthylbithiophene derivatives in acidic medium: Electrochemical, surface characterization and computational approaches

Fouda

Etaiw

Ismail

et al. 2022

Preprint

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The inhibition efficiency and adsorption affinity were investigated for two novel compounds, namely: 6-methoxy-2-naphthyl-[2, 2’-bithiophene]-5-carboxamidine hydrochloride salt (MA-1440) and 5'-(4-chlorophenyl)-2, 2’-bifuran-5-carboxamidine hydrochloride salt (MA-1456). The inhibition study was conducted on carbon steel surface in 1.0 M HCl with different inhibitor doses and different temperature levels, to investigate the optimum dose and preferable temperature. The performed investigation included chemical, electrochemical, instrumental, and quantum computation techniques. A chemical technique was accomplished by using weight-loss measurements. Different factors were studied using weight-loss measurements in order to reach the maximum inhibition efficiency. The adsorption study revealed that the examined inhibitors obey the Langmuir adsorption isotherm and are chemically adsorbed on the steel surface. The electrochemical measurements were accomplished through the electrochemical impedance (EIS) and potentiodynamic polarization (PDP) techniques. Based on the electrochemical measurements, the examined compounds were categorized as mixed inhibitors. The instrumental examination using different techniques namely: scanning electron microscope (SEM), energy dispersive X-ray (EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) confirmed that the considered inhibitors are excellently adsorbed over the carbon steel surface. The extent of the adsorption affinity of these compounds on the carbon steel surface was studied theoretically using quantum computations and Monte Carlo simulation. The theoretical investigation results of quantum chemistry were validated with those obtained by chemical and electrochemical methodologies. All investigations prove that, the tested compounds were adsorbed chemically on the steel surface and achieved maximum inhibition efficiency of, 94.69% and 90.85% for M-1440 and MA-1456, respectively, at the optimum concentration 3010-6 mol. L-1 and temperature 328 K.

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“…The toxicity of organic and inorganic inhibitors unacceptable for the environment and human health. Thus it is necessary to find cheap and environmentally safe corrosion inhibitors [10,11]. Studies are directed towards the exploration for ecofriendly corrosion inhibitors which are ecologically acceptable.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Aluminum Alloy 7025 in Acid Solution Using Sulphamethoxazole

Naser

2020

Egypt. J. Chem.

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Corrosion behavior of aluminum alloy 7025 was investigated in hydrochloric acid (pH=1) containing 0.6 mol.dm-3 NaCl in the existence and absence of diverse concentrations of sulphamethoxazole as environmentally friendly corrosion inhibitor over the temperature range (298-313)K. Electrochemical polarization method using potentiostatic technique was employed. The inhibition efficiency has been raised with increased sulphamethoxazole concentration but lessened at temperature increases. The highest efficiency value was 96.5 at 298 K and 2 x10-4 mol.dm-3 concentration of sulphamethoxazole. The sulphamethoxazole adsorption was agreed with Langmuir adsorption isotherm. Some thermodynamic parameter (△Gads) and activation energy (Ea) were determined to demonstrate the process of corrosion inhibiting. The kinetic parameters were calculated using Arrhenius equation. An appropriate mechanism has been suggested for aluminum corrosion in acidic medium. The results show that sulphamethoxazole is a mixed type inhibitor. The surface morphology of uninhibited and inhibited samples was investigated using an optical microscope.

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Electrochemical Impedance spectroscopy (EIS) and study of iron corrosion inhibition by turmeric roots Extract (TRE) in hydrochloric acid solution

Cited by 9 publications

References 7 publications

Formamidine-Based Thiuram Disulfides as Efficient Inhibitors of Acid Corrosion of Mild Steel: Electrochemical, Surface, and Density Functional Theory/Monte Carlo Simulation Studies

Formamidine-Based Thiuram Disulfides as Efficient Inhibitors of Acid Corrosion of Mild Steel: Electrochemical, Surface, and Density Functional Theory/Monte Carlo Simulation Studies

Corrosion protection of carbon steel by methoxy naphthylbithiophene derivatives in acidic medium: Electrochemical, surface characterization and computational approaches

Inhibition of Aluminum Alloy 7025 in Acid Solution Using Sulphamethoxazole

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