Electrochemical studies on the interaction of l-cysteine with metallic copper in sulfuric acid

Kuruvilla, Mathew; John, Sam; Joseph, Abraham

doi:10.1007/s11164-012-0860-y

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…Effect of Temperature. The effect of varying temperatures (25,35,45, and 55 °C) in the three-acid media on k (corrosion rate) and % IE for MSL without and with different concentrations of Cys. is displayed in Figures 3 and 4, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Elabbasy,

Toghan,

Gadow

2024

ACS Omega

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The corrosion of iron in acidic environments has a negative impact on global industry. Herewith, the inhibitory effect of cysteine (Cys.) on mild steel (MSL) corrosion in different acidic solutions (1 M HCl, 1 M H 2 SO 4 , and 1 M H 3 PO 4 ) was investigated through weight loss, potentiodynamic polarization (PDP), electrochemical impedance spectroscopy, scanning electron microscopy (SEM), and theoretical calculations. The measurement results indicated that the adsorption of Cys. molecules on the metal surface caused corrosion inhibition. As a result, a protective layer or insoluble compound, or both, is obtained, blocking the active sites, preventing corrosion. The effectiveness (IE %) of the Cys. was enhanced by increasing concentration and lowering temperature. The maximum IE % of inhibition at 1 × 10 −2 M of Cys. obtained are 97.3, 89.7, and 84.4% in HCl, H 3 PO 4 , and H 2 SO 4 solutions, respectively. At the same inhibitor concentration, the double-layer capacity decreased, and the charge-transfer resistance increased from 17.17 to 188.5, 3.564 to 31.91, and 1.325 to 8.715 Ω cm 2 in HCl, H 3 PO 4 , and H 2 SO 4 solutions, respectively. Adsorption and PDP studies confirmed that it obeys the Langmuir adsorption isotherm and acts as a mixed-type inhibitor of physicochemical nature. The corresponding thermodynamic and kinetic parameters were also calculated and discussed. Moreover, the inhibitory effect on the surface was inspected by SEM. The findings demonstrated that the order of IE % using Cys as anticorrosion agent for MSL is HCl > H 3 PO 4 > H 2 SO 4 solutions.

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Section: Resultsmentioning

confidence: 99%

“…Cys. has been used to prevent the corrosion of a wide variety of metals in various environments acidic. − …”

Section: Introductionmentioning

confidence: 99%

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Elabbasy,

Toghan,

Gadow

2024

ACS Omega

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“…Table makes it evident that as temperature rises, Δ G ads 0 rises as well, indicating that 4-NBAAP corrosion inhibition of MS is an exothermic process. Here, adsorption of 4-NBAAP on the metal surface becomes unfavorable as the reaction temperature rises. − The integrated version of the Van’t Hoff equation can be used to calculate the entropy of adsorption and the enthalpy of adsorption (Δ H ads 0 ) and it is expressed as follows. − normalΔ G normala normald normals 0 = normalΔ H normala normald normals 0 − T normalΔ S normala normald normals 0 Figure shows a linear plot of Δ G ads 0 against T , where the intercept is equal to Δ H ads 0 and the slope is equal to Δ S ads 0 . The values of Δ S ads 0 and Δ H ads 0 that were obtained are −123.4 and −72.56 kJ mol –1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Quantum Chemical and Experimental Evaluation of a 4-Amino-Antipyrine Based Schiff Base as Corrosion Inhibitor for Steel Material

Narayanswamy,

Ramakrishna,

Shekar

et al. 2024

ACS Omega

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Electrochemical experiments such as potentiodynamic polarization, electrochemical impedance spectroscopy, and gravimetric studies have been used to examine the corrosion inhibitory efficacy of 4-[(4-nitrobenzylidene)-amino]-antipyrine (4-NBAAP) on mild steel (MS) in 1 M HCl. 4-NBAAP inhibits the corrosion of MS through a mixed inhibition mechanism, according to the electrochemical investigation. The efficiency of 4-NBAAP increases with an increase in the inhibitor concentration and decreases with an increase in temperature. The adsorption of 4-NBAAP molecules on the MS surface follows the Langmuir adsorption isotherm. To find the relationship between the 4-NBAAP molecular structure and inhibitive effect, a few thermodynamic parameters were computed. The experimental results obtained from gravimetric and different electrochemical investigations prove the superiority of the inhibitor at higher concentrations in controlling the corrosion process of the steel in aggressive environments. Also, quantum chemical studies were performed to provide further insights into the inhibition mechanism.

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“…The Nyquist schemes do not produce perfect semicircles as predictable from the theory of EIS. The abnormality from ideal semicircle was usually credited to the frequency scattering[38] as well as to the in-homogeneities of the surface.EIS data of the 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano [3,2-c]quinoline-3-carbonitrile campsite at 30˚C ± 0.1˚C was examine utilize the equivalent circuit(Figure 3), which signifies a single charge transfer reaction and The Nyquist (a) and Bode (b) diagrams for Cu corrosion in nonexistence and existence of unlike dose of 2-amino-6-methyl-5-oxo-4-phenyl-5, 6-dihydro-4H-pyrano [3,2-c]quinoline-3-carbonitrile composite at 30˚C± 0.1˚C.…”

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Electrochemical and Surface Characterization Studies of 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Compound on Copper in 2 M HNO<sub>3</sub>

Eldesoky¹,

Attia²,

Ahmed³

et al. 2019

MSCE

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The corrosion hindrance of Cu in 2.0 M HNO 3 solution by 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile compound has been studied, using Potentiodynamic Polarization (PP), AC Impedance (EIS), Electrochemical Frequency Modulation (EFM) techniques. Also, EIS test was utilized to confirm the corrosion protection mechanism. 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3carbonitrile compound is suggested as a mixed kind inhibitor. SEM and EDX investigations of the Cu in 2.0 M HNO 3 surface revealed that assembles protect Cu from corrosion by adsorption on its surfaces by a forming coating film. Clearly, the assembled mechanisms play a role as a barrier to corrosive solution.

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Electrochemical studies on the interaction of l-cysteine with metallic copper in sulfuric acid

Cited by 12 publications

References 19 publications

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Quantum Chemical and Experimental Evaluation of a 4-Amino-Antipyrine Based Schiff Base as Corrosion Inhibitor for Steel Material

Electrochemical and Surface Characterization Studies of 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Compound on Copper in 2 M HNO<sub>3</sub>

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Electrochemical studies on the interaction of l-cysteine with metallic copper in sulfuric acid

Cited by 12 publications

References 19 publications

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Cysteine as an Eco-Friendly Anticorrosion Inhibitor for Mild Steel in Various Acidic Solutions: Electrochemical, Adsorption, Surface Analysis, and Quantum Chemical Calculations

Quantum Chemical and Experimental Evaluation of a 4-Amino-Antipyrine Based Schiff Base as Corrosion Inhibitor for Steel Material

Electrochemical and Surface Characterization Studies of 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Compound on Copper in 2 M HNO&lt;sub&gt;3&lt;/sub&gt;

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Electrochemical and Surface Characterization Studies of 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Compound on Copper in 2 M HNO<sub>3</sub>