Inhibicijska djelotvornost eteričnog ulja bosiljka (Ocimum Basilicum L.) i njegovih najviše zastupljenih komponenti na proces korozije aluminija

master's thesis

• Title (english): Inhibition efficiency of basil essential oil (Ocimum basilicum L.) and it's most represented components on the corrosion process of aluminium
• Author: Anja Žutinić
• Mentor: Katarina Berković (mentor)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Chemistry and Biochemistry); (Laboratory for Physical Chemistry and Corrosion); Zagreb
• Defense date and country: 2012-10-09, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Food Technology

Abstract

U ovom radu ispitana je inhibicijska djelotvornost eteričnog ulja bosiljka (Ocimum basilicum L.) i njegovih najviše zastupljenih komponenti, linaloola te eugenola, na proces korozije aluminija u otopini klorovodične kiseline koncentracije 0,5 mol dm-3. Gravimetrijska mjerenja pokazala su, da se brzine korozije aluminija u 0,5 mol dm-3 otopini klorovodične kiseline dodatkom otopina svih koncentracija (200, 600, 2000, 4000 i 6000 ppm) ispitivanih inhibitora znatno smanjuju. Elektrokemijskim mjerenjima dokazano je da se kod eteričnog ulja bosiljka i linaloola maksimalan stupanj djelotvornosti postiže pri koncentraciji od 6000 ppm, dok je 2000 ppm koncentracija pri kojoj eugenol pokazuje najbolju inhibicijsku djelotvornost. Ovakvo ponašanje može se pripisati planarnoj orijentaciji molekula eugenola prilikom adsorpcije na površinu aluminija. EIS metodom dokazano je postojanje homogenog i kompaktnog zaštitnog filma inhibitora na površini aluminija, dok se inhibicijska djelotovornost eteričnog ulja bosiljka može pripisati molekuli linaloola.

Abstract (english)

In this thesis, the inhibition efficiency of basil essential oil (Ocimum basilicum L.) and it's main components, linalool and eugenol, on the corrosion process of aluminum in 0.5 mol dm-3 hydrochloric acid solution, was studied. Gravimetric measurements showed, that the corrosion rate of aluminum in 0,5 mol dm-3 hydrochloric acid solution was significantly reduced in the presence of all the concentrations (200, 600, 2000, 4000 and 6000 ppm) of studied inhibitors. Electrochemical measurements proved that the essential oil of basil and linalool achieve their maximum efficiency at the concentration of 6000 ppm, while 2000 ppm is the concentration at which eugenol showed the best efficency. This behavior can be attributed to the planar orientation of eugenol molecules during the adsorption on the surface of aluminum. EIS measurements confirmed the existence of a homogeneous and compact protective inhibitor film on the aluminum surface, while the inhibition efficiency of basil essential oil can be attributed to linalool molecule.

• Keywords: aluminij; eterično ulje bosiljka; inhibicija korozije; eugenol; linalool
• Keywords (english): aluminium; basil oil; corrosion inhibition; eugenol; linalool
• Language: croatian
• URN:NBN: urn:nbn:hr:159:012564
• Study programme: Title: Food Technology; specializations in: Food Engineering; Course: Food Engineering; Study programme type: university; Study level: graduate; Academic / professional title: diplomirani inženjer prehrambene tehnologije; smjer prehrambeno inženjerstvo (diplomirani inženjer prehrambene tehnologije; smjer prehrambeno inženjerstvo)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2017-05-17 09:04:16