Glutathione as green corrosion inhibitor for 6061Al-SiC(p) composite in HCl medium: electrochemical and theoretical investigation

Unnimaya,; Shetty, Prakash; Kumari, Preethi; Kagatikar, Sneha

doi:10.1007/s10008-022-05315-7

Cited by 6 publications

(3 citation statements)

References 49 publications

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“…The negative entropy of the adsorption of corrosion inhibitors refers to the decrease in randomness or disorderliness of the system when a corrosion inhibitor is adsorbed onto a metal surface. This decrease in entropy is due to the formation of ordered layers of inhibitor molecules on the metal surface, which reduces the mobility and randomness of the molecules . The negative sign of Δ H ads ° , which indicates that %IE falls with temperature, further supports our conclusion that the adsorption of the extract on the Al surface has exothermic nature .…”

Section: Resultssupporting

confidence: 77%

“…This decrease in entropy is due to the formation of ordered layers of inhibitor molecules on the metal surface, which reduces the mobility and randomness of the molecules. 25 The negative sign of ΔH ads °, which indicates that %IE falls with temperature, further supports our conclusion that the adsorption of the extract on the Al surface has exothermic nature. 26 Adsorption is exothermic based on these negative values.…”

Section: Resultsmentioning

confidence: 99%

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Eco-Friendly Methanolic Myrrh Extract Corrosion Inhibitor for Aluminum in 1 M HCl

2023

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Aluminum corrosion was inhibited by myrrh extract when it was placed in a solution of 1 M HCl. Several procedures were used for these tests, including weight loss WL, potential dynamic polarization PL, and electrochemical impedance EIS in addition to theoretical calculations like density functional theory (DFT), Fukui functions, and Monte Carlo simulation. Fourier transform infrared spectroscopy was used to analyze the compositional surface of Al. Scanning electron microscopy was used to determine the shape of the Al surface. The inhibition rate of Al corrosion in HCl with varying myrrh extract contents at 25–45 °C was studied. An analysis of the PL curves indicates that myrrh extract is an inhibitor of mixed type. Upon increasing the concentration of myrrh, the inhibition efficiency increased. Moreover, rising temperatures decrease inhibition efficiency. It was discovered that the inhibition process follows the Langmuir isotherm, demonstrating that a monolayer has formed on the surface of aluminum. Theoretical and practical studies proved the validity of the conclusions.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Methanolic Myrrh Extract Corrosion Inhibitor for Aluminum in 1 M HCl

2023

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“…The sequence described in Fig. 2 begins with the test of the steel exposed to acid, applying open circuit potential (OCP) for 1 hour to monitor the equilibrium potential of the system, later EIS technique is used with a sweep of frequencies ranging from 100KHz at 10mHz, with an amplitude of 10 mV with 10 points/decade, at the end Tafel was applied, with a sweep potential of ± 250 mV, and a sweep speed of 1.66 mV/s [15][16][17]. Once this first sequence of tests was finished, the first extract concentration of 40 ppm was added, and the OCP, EIS, and Tafel techniques were applied again.…”

Section: Electrochemical Evaluationmentioning

confidence: 99%

Leaf Liquid Extract of Citrus X-Latifolia for Corrosion Inhibition of Structural Steel AISI 1045 in Acidic Environment

Trinidad González,

Herrera Hernández,

Mandujano Ruiz

et al. 2023

J. Mex. Chem. Soc.

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Abstract. In the present research work, the corrosion inhibition capacity of a liquid extract based on Citrus X-Latifolia leaves was evaluated as a green inhibitor that complies with a natural, economical, and environmentally friendly option. The tests were carried out on a carbon steel AISI 1045 exposed to an acid corrosive medium of 10 mL H2SO4 (0.5 M) to which various concentrations of the extract were dosed as follows: 40, 80, 120, 160, 200, 240, 280, 320, 360 and 400 ppm under standard conditions. Characterization by FT-IR was carried out to detect functional groups of the extract. The inhibitory behavior was recorded by electrochemical techniques (Tafel polarization and EIS). Finally, optical microscopy was used to evaluate the corrosion morphology. The results reveal that the adsorption of the extract molecules on steel follows the behavior of a Langmuir isotherm, reaching a maximum efficiency of 89 % with a concentration of 400 ppm. Finally, an evident change in the surface morphology of the steel sample is observed, thus reducing the pitting corrosion attack on AISI 1045 steel. Resumen. En el presente trabajo de investigación se evaluó la capacidad de inhibición de la corrosión de un extracto líquido a base de hojas de Citrus X-Latifolia como inhibidor verde que cumpla como una opción natural, económica y amigable con el medio ambiente. Los ensayos se realizaron sobre un acero al carbono AISI 1045 expuesto a un medio ácido corrosivo de 10 mL de H2SO4 (0,5 M) al que se dosificaron diversas concentraciones del extracto: 40, 80, 120, 160, 200, 240, 280, 320, 360 y 400 ppm en condiciones estándar. Se realizó una caracterización por FT-IR para detectar los grupos funcionales del extracto. El comportamiento inhibitorio se registró mediante técnicas electroquímicas (polarización de de Tafel y EIS). Finalmente, se utilizó microscopía óptica para evaluar la morfología de la corrosión. Los resultados revelan que la adsorción de las moléculas del extracto sobre el acero sigue el comportamiento de una isoterma de Langmuir, alcanzando una eficiencia máxima del 89 % con una concentración de 400 ppm. Finalmente, se observa un cambio evidente en la morfología superficial de la muestra de acero, reduciéndose así el ataque de corrosión por picaduras en el acero al carbono 1045.

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Green corrosion inhibitors of steel based on peptides and their constituents: a combination of experimental and computational approach

Simović

Stevanović

Milovanovic

et al. 2023

J Solid State Electrochem

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Glutathione as green corrosion inhibitor for 6061Al-SiC(p) composite in HCl medium: electrochemical and theoretical investigation

Cited by 6 publications

References 49 publications

Eco-Friendly Methanolic Myrrh Extract Corrosion Inhibitor for Aluminum in 1 M HCl

Eco-Friendly Methanolic Myrrh Extract Corrosion Inhibitor for Aluminum in 1 M HCl

Leaf Liquid Extract of Citrus X-Latifolia for Corrosion Inhibition of Structural Steel AISI 1045 in Acidic Environment

Green corrosion inhibitors of steel based on peptides and their constituents: a combination of experimental and computational approach

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