Comparative studies of inhibitive properties of <i>Ficus polita</i> and <i>Ficus platyphylla</i> on corrosion inhibition of mild steel in acidic medium

Adah, Christiana Agbenu; Adejo, Sylvester O.; Gbertyo, Joeseph Aondoaver; Ogwuche, Andrew Adah

doi:10.2478/auoc-2021-0006

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…As depicted in Fig. 12 , various isotherms are investigated using experimental data from EIS, and PDP measurements at 293 K. Temkin adsorption isotherm is found to be the best fit one for Cefx while Freundlich adsorption isotherm fits Cefz well as 73 , 74 . Table 7 shows the computed values of K ads and ΔG o ads for Cefx and Cefz based on the best fitting adsorption isotherms.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and computational estimations of cephalosporin drugs as eco-friendly and efficient corrosion inhibitors for aluminum in alkaline solution

Mohamedien

Kamal

El‐Deen

et al. 2022

Sci Rep

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In this study, the anionic state of Ceftriaxone sodium (Cefx) and Ceftazidime (Cefz) medication corrosion inhibition capabilities for Al in 0.1 M NaOH solution are explored using various electrochemical analyses. Furthermore, the morphological structure and surface chemical composition of the impact of these drugs on the Al substrate in NaOH are investigated. For the prediction and analysis of interactions between molecule structure and inhibition efficiency, quantum chemical calculations (QC), Monte Carlo simulations (MC), and molecular dynamics (MD) simulations (MD) are performed. The electrochemical findings reveal that the inhibitory effectiveness increases with increasing drug concentrations and declines with rising temperature, reaching a maximum value of 78.4% for 300 ppm Cefx while 59.5% for 300 ppm Cefz at 293 K, implying that Cefx outperforms for Cefz. In addition, the studied drugs act as cathodic inhibitors, and their adsorption is spontaneous and mixed type adsorption in its nature that obeys Freundlich isotherm for Cefz while Temkin isotherm is the best-fitted one for Cefx. Surface analysis and wettability measurements imply that Cefx and Cefz shield the Al against corrosion by surface adsorption and generating a protective hydrophobic film. Thermodynamic activation parameters in the absence and presence of 300 ppm of the studied drugs are calculated and discussed. The energies of the border molecular orbitals and computed molecular parameters for the investigated drugs revealed that anionic Cefx is more readily adsorbed on the Al surface than Cefz. This finding is validated further using MC and MD simulations. Overall, the proposed cephalosporin drugs delivered a cost-effective and facile approach for boosting the efficiency of corrosion inhibitors for Al under aggressive conditions.

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Section: Resultsmentioning

confidence: 99%

Electrochemical and computational estimations of cephalosporin drugs as eco-friendly and efficient corrosion inhibitors for aluminum in alkaline solution

Mohamedien

Kamal

El‐Deen

et al. 2022

Sci Rep

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“…Between the metal surface and the organic molecules, this monolayer formation requires energies above -40 KJ/mol. [7,[22][23][24][25] With equations 3 or 4, it is possible to perform the calculation for different adsorption models; the most used in the literature is the Langmuir model, which is calculated using the following expression:…”

Section: Adsorption Mechanismmentioning

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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Inhibition Potentials of Solanum macrocarpon Leave Extract as a Green Corrosion Inhibitor of Mild Steel in an Acidic Solution

Ezugha,

Aralu,

Eze

2024

J Bio Tribo Corros

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Comparative studies of inhibitive properties of Ficus polita and Ficus platyphylla on corrosion inhibition of mild steel in acidic medium

Cited by 4 publications

References 30 publications

Electrochemical and computational estimations of cephalosporin drugs as eco-friendly and efficient corrosion inhibitors for aluminum in alkaline solution

Electrochemical and computational estimations of cephalosporin drugs as eco-friendly and efficient corrosion inhibitors for aluminum in alkaline solution

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

Inhibition Potentials of Solanum macrocarpon Leave Extract as a Green Corrosion Inhibitor of Mild Steel in an Acidic Solution

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