Adsorption and Inhibitive Properties of Methanol Extract of Leucas aspera Leaves for the Corrosion of Mild Steel in HCl Medium

Kavitha, N.; Kathiravan, S.; Jyothi, S.; Murugesh, A.; Ravichandran, J.

doi:10.1007/s40735-019-0244-6

Cited by 9 publications

(2 citation statements)

References 28 publications

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“…Leucas Aspera contains phytochemical constituents like alkaloids, phytosterols, avonoids, saponins, phenols, and glycosides, which are responsible for its antibacterial, antioxidant, and cytotoxic effects [20]. Earlier, we reported the successful corrosion prevention of mild steel in HCl medium by methanol extract of Leucas Aspera leaves [21]. Thus, herein, we report the inhibitive properties of methanol extract of Leucas Aspera leaves on the corrosion of copper in a 0.5 M H 2 SO 4 medium.…”

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confidence: 78%

Leucas Aspera leaves extract as a copper corrosion inhibitor in 0.5M H2 SO4 medium

sankar,

narayanaperumal

2023

Preprint

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The corrosion inhibitive action of leaves extracts of Leucas Aspera on copper corrosion in 0.5M H2SO4 solution was studied using the weight-loss method, Potentiodynamic polarization, EIS measurements, SEM-EDXS and FT-IR spectroscopic techniques. The results obtained indicate that the extracts functioned as good inhibitors in 0.5M H2SO4 solution. The inhibition efficiency was found to increase with extract concentration. Potentiodynamic polarization curves indicated that the plant extracts behave as mixed-type inhibitors. The thermodynamic parameters showed that the adsorption of the extracts on copper is physical, spontaneous, and favoured at low temperatures. The data for the adsorption of extract fit well with Langmuir adsorption isotherm. FTIR results showed that the inhibition mechanism was by the absorption process, through the functional groups present in the extract. The SEM images of the corrosion product confirmed the protection offered by the extract on the surface of the metal immersed in the 0.5M H2SO4 medium.

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confidence: 78%

Leucas Aspera leaves extract as a copper corrosion inhibitor in 0.5M H2 SO4 medium

sankar,

narayanaperumal

2023

Preprint

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“…10b shows a shift in the absorption wavelength after immersion in HCl 1M. This wavelength shift indicates that the CBE is by adsorption by forming interaction with the steel surface [58,59].…”

Section: Ftir Spectra Analysismentioning

confidence: 93%

The brown algae Cystoseira Baccata extract as a friendly corrosion inhibitor on carbon steel in acidic media

et al. 2020

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The inhibition properties of the isopropanol extract of brown seaweed Cystoseira baccata (CBE), against corrosion of carbon steel in HCl 1M medium, was evaluated using the weight-loss method and electrochemical measurements. It was shown that the extract exhibit excellent performance as inhibitors and the inhibition efficiency increased with the concentration. The maximal value of inhibition efficiency is 86.5% obtained by the Tafel method at 700 mg/l at 298 K. The polarization curves indicate that the CBE acts as a mixed-type inhibitor. The results obtained by electrochemical impedance spectroscopy shows that the inhibitory action of this extract is based on the increase in the charge transfer resistance and the decrease in the double layer capacity. The temperature influence studied in the temperature range 298-328 K by weight-loss method shows that the inhibition efficiency decreases with increasing temperature for all concentrations of CBE. The adsorption and activation parameters allow us to suggest the physical adsorption of this inhibitor on the metal. The adsorption of the extract on the carbon steel follows Langmuir adsorption isotherm.

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Aerva lanata flowers extract as green corrosion inhibitor of low-carbon steel in HCl solution: an in vitro study

Hynes¹,

Selvaraj²,

Tezeghdenti

et al. 2020

Chem. Pap.

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Adsorption and Inhibitive Properties of Methanol Extract of Leucas aspera Leaves for the Corrosion of Mild Steel in HCl Medium

Cited by 9 publications

References 28 publications

Leucas Aspera leaves extract as a copper corrosion inhibitor in 0.5M H2 SO4 medium

Leucas Aspera leaves extract as a copper corrosion inhibitor in 0.5M H2 SO4 medium

The brown algae Cystoseira Baccata extract as a friendly corrosion inhibitor on carbon steel in acidic media

Aerva lanata flowers extract as green corrosion inhibitor of low-carbon steel in HCl solution: an in vitro study

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