Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/5549
Title: Black pine (Pinus nigra) essential oil as a green corosion inhibitor for carbon steel
Authors: Simović, Anđela
Grgur, Branimir
Novaković, Jelica 
Janaćković, Peđa 
Bajat, Jelena
Keywords: Steel;Corrosion;Plants;Essential oil
Issue Date: 28-Feb-2023
Rank: M22
Publisher: MDPI
Journal: Metals
Volume: 13
Issue: 3
Start page: 508
Abstract: 
In this work, the essential oil of black pine (Pinus nigra J. F. Arnold) was used for the first time as a natural, ecological, and sustainable corrosion inhibitor for the acid cleaning of carbon steel. The essential oil was extracted by hydrodistillation using a Clevenger-type apparatus, and the oil was analyzed by gas chromatography–flame–ionization detection (GC–FID) and gas chromatography–mass spectrometry (GC–MS). The most abundant components in the essential oil were α-pinene, germacrene D, (E)-cariophyllene, and β-pinene. The inhibition efficiency was determined by electrochemical methods (electrochemical impedance spectroscopy and potentiodynamic polarization measurements). The results showed that the inhibitory efficiency of the black pine essential oil increases with time, reaching the highest values after 4 h of immersion for all inhibitor concentrations. It was also shown that black pine essential oil is a mixed-type inhibitor. The contact angle measurements confirmed that the black pine essential oil, as a new natural, environmentally safe inhibitor, is able to protect carbon steel from corrosion in a 1 M HCl solution.
URI: https://biore.bio.bg.ac.rs/handle/123456789/5549
ISSN: 2075-4701
DOI: 10.3390/met13030508
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