Corrosion Inhibition of C38 Steel in 1 M HCl: A Comparative Study of Black Pepper Extract and Its Isolated Piperine

Corrosion inhibition effect of black pepper (BP) extract and its piperine isolated from BP on corrosion of C38 steel in 1 M HCl solution was investigated by weight loss method. Piperine was isolated by ethanol in yield 6 from ground BP. Results obtained from weight loss measurements indicate that th...

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Bibliographic Details
Published in:International journal of electrochemical science 2010-08, Vol.5 (8), p.1060-1069
Main Authors: Dahmani, M., Et-Touhami, A., Al-Deyab, S.S., Hammouti, B., Bouyanzer, A.
Format: Article
Language:English
Subjects:
acid solutions
adsorption
Corrosion
green inhibitor
piperine
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Summary:Corrosion inhibition effect of black pepper (BP) extract and its piperine isolated from BP on corrosion of C38 steel in 1 M HCl solution was investigated by weight loss method. Piperine was isolated by ethanol in yield 6 from ground BP. Results obtained from weight loss measurements indicate that the natural compounds tested exhibit higher efficiency exceeding 95% at 2g/L. The presence of piperine decreases hugely the corrosion rate and its inhibition efficiency (E%) increases with concentration to attain 99 % at 10-3M. Piperine adsorbs on the steel surface according Langmuir isotherm. Adsorption enthalpy were determined and discussed. Effect of temperature was also investigated and activation parameters were evaluated
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)15344-2