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2022, vol. 63, iss. 2, pp. 115-121
Testing the effectiveness of raspberry flower extract as an inhibitor of copper's corrosion in 3% NaCl
aUniversity of Zenica, Faculty of Metallurgy and Materials Science, Federation of B&H
bUniversity of Sarajevo, Faculty of Science, Federation of B&H
Keywords: extraction; raspberry flower; inhibitor; Tafel extrapolation; potentiodynamic polarization; linear polarization; electrochemical impedance spectroscopy
The paper presents an examination of the possibility of applying raspberry flower extract (Rubus idaeus L.) as a green inhibitor of general corrosion of copper in 3% NaCl. Raspberry flowers (Rubus idaeus L.) sort Polka were collected from the Moševac near Maglaj city, Bosnia and Herzegovina. Raspberry flower extract in ethanol was obtained by ultrasonic extraction. A significant content of polyphenol was found in the raspberry flower extract by UV/VIS spectrophotometry analysis. Results obtained by DC techniques (by the methods of Tafel extrapolation, potentiodynamic polarization and linear polarization) prove that the corrosion rate decreases in the presence of the raspberry flower extract. Tests performed by the method of electrochemical impedance spectroscopy prove that the tested extracts slow down the kinetics of the corrosion process, which is visible through the increase in resistance. The results of the conducted tests prove that in an aggressive medium, such as 3% NaCl solution, Polka raspberry flower extract can be used as an inhibitor of copper's corrosion.
ASTM G5-94 Standard Reference Test Method for Making Potentiostatic and Potenciodynamic Anodic Polarization Measurements
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article language: English
document type: Scientific Paper
DOI: 10.5937/zasmat2202115K
received: 12/10/2021
accepted: 24/12/2021
published in SCIndeks: 18/06/2022
Creative Commons License 4.0

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