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

Autor: K. Chefira, Rachid Nmila, T. Benabbouha, M. Siniti, Halima Rchid, H. El Attari
Rok vydání: 2020
Předmět:
Zdroj: SN Applied Sciences. 2
ISSN: 2523-3971
2523-3963
DOI: 10.1007/s42452-020-2492-y
Popis: 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.
Databáze: OpenAIRE
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