Hydrazide derivatives as corrosion inhibitors for mild steel in 1M HCl

Larabi, L.; Harek, Yahia; Benali, O.; Ghalem, Saïd

doi:10.1016/j.porgcoat.2005.06.015

Cited by 177 publications

(41 citation statements)

References 34 publications

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“…Basic information on the interaction between the inhibitors and the mild steel surface (18) and mechanism of electrochemical reaction (19) may be provided by the adsorption isotherm. The surface coverage of different concentrations of inhibitor in acidic media has been evaluated from weight loss measurements and attempted to fit these values to different sorption isotherms.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Similarly, the higher ionization of basic species of inhibitor in sulfuric acid may be the reason of these compounds exhibiting higher inhibition efficiencies in sulfuric acid as compared to hydrochloric acid, because of increased ionization. Moreover, the adsorption of inhibitor on anodic sites through lone pair of electrons on sulfuric ions (SO 2À 4 ) reduces the anodic dissociation of mild steel may be the cause for better inhibiting properties of AELHS in sulfuric acid than in hydrochloric acid (18).…”

Section: Effect Of Acid Solutionmentioning

confidence: 99%

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Mild steel corrosion inhibition by acid extract of leaves ofHibiscus sabdariffaas a green corrosion inhibitor and sorption behavior

Murthy

Vijayaragavan

2014

Green Chemistry Letters and Reviews

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A new corrosion inhibitor, namely acid extract of leaves of Hibiscus sabdariffa, has been synthesized, and its inhibiting action on the corrosion of mild steel in acidic bath (1.2 N HCl and 1.2 N H 2 SO 4 ) has been investigated by corrosion-monitoring techniques. The results of the present study show that this compound has decent inhibiting property for mild steel corrosion in 1.2 N H 2 SO 4 than 1.2 N HCl. Four sorption isotherms are tested for the data, namely Langmuir, Frumkin, Florry-Huggins, and Langmuir-Freundlich isotherms; of these the Langmuir isotherm fits the data well having correlation coefficient over 0.99 in both the acid environments.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Effect Of Acid Solutionmentioning

confidence: 99%

Mild steel corrosion inhibition by acid extract of leaves ofHibiscus sabdariffaas a green corrosion inhibitor and sorption behavior

Murthy

Vijayaragavan

2014

Green Chemistry Letters and Reviews

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“…A charge transfer resistor (R t ) corresponding to the electrochemical reactions taking place at the interface, and a constant phase element (CPE) [25][26][27], used to account for the frequency dispersion via of the coefficient (n). The impedance of such element is [28]: with where Q is a proportionality factor (real constant) and C dl is the double layer capacitance.…”

Section: Electrochemical Impedance Spectroscopy Characterizationsmentioning

confidence: 99%

“…The physical or chemical nature of adsorption depends on several parameters, such as the nature of the metal and its charge, the chemical structure of organic molecules as well as the type of the electrolyte. The surface coverage (θ) for different concentrations of L. stoechas oil in acid medium is evaluated by adopting gravimetry as study methods, we can write [4,27,29] (6)…”

Section: Kinetics-thermodynamics Parametermentioning

confidence: 99%

The effect of feldspar and kaolin on mechanical performance of SBR/LDPE composites

Mousa

2013

International Journal of Industrial Chemistry

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The current study was designed to give more knowledge and helping to exploit the leaves of the plants L. stoechas collected in Tlemcen region in the west of Algeria by determining the anti-corrosive activity of its essential oil. The inhibitory efficiency of the essential oil of the plant obtained by hydrodistillation and characterized by GC and GC/MS was studied using gravimetric and electrochemical methods (polarization curves and electrochemical impedance). The effect of temperature on the corrosion behavior of the steel and the inhibitory efficiency was studied in a temperature range of 303-323 K at 2 g/L. The surface morphology of the samples immersed in 1 M HCl for 24 h, before and after adding inhibitor at (2 g/L at 30 °C) was analyzed by scanning electron microscope (SEM) Quanta 250 with tungsten filament from the company FEI. Results show that the addition of the essential oil of the plant to the medium induces a diminish in the rate of corrosion and augmentation in the inhibitory efficiency of the oil. We established that the inhibition efficiency increase with concentration of the essential oil of lavender to attain 76.19% at 2 g/L. Polarization curves revealed that lavender oil react as a mixed-type inhibitor. EIS spectra exhibit one capacitive loop and confirm the inhibitive ability, and the changes in impedance parameters were indicative of adsorption of essential oil of lavender on the metal surface. The thermodynamic parameters indicate that the adsorption of the molecules of the oil takes place according to the Langmuir isotherm in the corrosive medium studied and that they are physisorbed on the metal surface. The analysis of the surface by electron microscopy demonstrates the absence of surface attack patterns in the presence of the oil. The results obtained from different tested techniques were in good agreement.

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“…[18,28,32,33]. The higher E * a can be correlated with the increased thickness of the formed double layer, which increases the activation energy of the corrosion process [4,16,23,34].…”

Section: Effect Of Temperaturementioning

confidence: 99%

Sweet Corrosion Inhibition on API 5L-B Pipeline Steel

Ibraheem

Fouda

Rashad³

et al. 2012

ISRN Metallurgy

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Corrosion inhibition and adsorption behavior of two triazole derivatives on API 5L-B carbon steel in CO 2 -saturated 3.5% NaCl solutions was investigated using potentiodynamic polarization, EIS, and EFM techniques. Specimen surfaces were characterized using SEM, EDX, and XRD. Results show that the two compounds are mixed-type inhibitors and inhibition efficiency increases with increasing concentrations. Adsorption of the two compounds chemisorption and obeys Langmuir adsorption isotherm. Activation energy and thermodynamic parameters were calculated. Surface analyses confirm the formation of iron nitrides on the metal surface which supports results obtained from previous techniques.

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Hydrazide derivatives as corrosion inhibitors for mild steel in 1M HCl

Cited by 177 publications

References 34 publications

Mild steel corrosion inhibition by acid extract of leaves ofHibiscus sabdariffaas a green corrosion inhibitor and sorption behavior

Mild steel corrosion inhibition by acid extract of leaves ofHibiscus sabdariffaas a green corrosion inhibitor and sorption behavior

The effect of feldspar and kaolin on mechanical performance of SBR/LDPE composites

Sweet Corrosion Inhibition on API 5L-B Pipeline Steel

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