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Title:Komercialna kurkuma kot inhibitor korozijskih procesov : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Patik, Eva (Author)
ID Fuchs-Godec, Regina (Mentor) More about this mentor... New window
ID Bren, Urban (Comentor)
Files:.pdf UN_Patik_Eva_2023.pdf (2,99 MB)
MD5: 27382BE5EDDE9BDF7F3489EECBF8D147
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Korozija predstavlja enega izmed pomembnih globalnih problemov. Z uporabo korozijskih inhibitorjev lahko upočasnimo raztapljanje kovinskih materialov v agresivnih medijih, in sicer so najbolj zaželeni zeleni inhibitorji, saj nimajo negativnih vplivov na okolje. Glavna komponenta kurkume je kurkumin, ki zaradi antioksidativnih lastnosti sodi med potencialne zelene inhibitorje korozijskih procesov. Namen diplomskega dela je ugotoviti, ali kurkuma zagotavlja učinkovito protikorozijsko zaščito v 3,5-odstotni raztopini NaCl in kako je ta odvisna od koncentracije dodanega inhibitorja (komercialne kurkume). Zaščitne prevleke so bile narejene s potopitvijo vzorca aluminijaste pločevine v etanolno ali metanolno raztopino oktadekanojske kisline z dodatkom komercialne kurkume v različnih koncentracijah. V ta namen smo uporabili klasično potenciodinamsko metodo. Na osnovi klasičnih korozijskih parametrov (gostota korozijskega toka in polarizacijska upornost) smo izračunali korozijsko hitrost in inhibicijsko učinkovitost. Za določitev morfologije zaščitnega sloja je bil uporabljen elektronski mikroskop SEM, na osnovi omočitvenega kota pa smo določili, ali je ta samosestavljiva plast hidrofilna ali hidrofobna. Z ATR-FTIR-spektroskopijo smo analizirali sestavo zaščitne prevleke, kar pomeni prisotnost funkcionalnih skupin v nastalem sloju na površini kovinskega vzorca. Prav tako smo s to metodo analizirali tudi samo raztopino, v katero so bili kovinski vzorci potopljeni. Meritve kontaktnega kota dokazujejo, da imajo tako pripravljene samosestavljive prevleke hidrofobne lastnosti, katerih vrednosti inhibicijske učinkovitosti presegajo vrednost 80 %.
Keywords:korozija, aluminij, zeleni korozijski inhibitor, kurkuma, potenciodinamska metoda
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[E. Patik]
Year of publishing:2023
Number of pages:1 spletni vir (1 datoteka PDF (VIII, 35 f.))
PID:20.500.12556/DKUM-85292 New window
UDC:620.197.3:547.979.4(043.2)
COBISS.SI-ID:166684419 New window
Publication date in DKUM:11.09.2023
Views:732
Downloads:258
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:24.08.2023

Secondary language

Language:English
Title:Commercial turmeric as an inhibitor of corrosion processes
Abstract:Corrosion is one of the biggest global problems. Corrosion inhibitors can be used to slow the dissolution of metal samples in aggressive media, and green inhibitors are the most desirable because they have no negative impact on the environment. The main component of turmeric is curcumin, which is one of potential green inhibitors of corrosion processes due to its antioxidant properties. The purpose of this work is to investigate whether turmeric in a 3.5% NaCl solution provides effective corrosion protection and how this depends on the concentration of the added inhibitor (commercial turmeric). Protective coatings were prepared by immersing an aluminium sample in ethanol or methanol solutions of octadecanoic acid with the addition of commercial turmeric at different concentrations. For this purpose, we applied the classical potentiodynamic method. Based on the typical corrosion parameters (corrosion current density and polarisation resistance), the corrosion rate and inhibition effect were calculated. The SEM electron microscope was used to determine the morphology of the protective layer, and the contact angle was applied to determine whether the corresponding self-assembling layer was hydrophilic or hydrophobic. ATR-FTIR spectroscopy was used to analyse the composition of the protective layer, i.e., the presence of functional groups in the formed layer on the surface of the metal sample. Moreover, the solution in which the metal samples were immersed was also analysed by this method. The contact angle measurements show that the self-assembled coatings prepared in this way exhibit hydrophobic properties with a corrosion inhibition effect of over 80%.
Keywords:corrosion, aluminium, green corrosion inhibitor, turmeric, potentiodynamic method


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