Ionske tekočine kot inhibitorji korozijskih procesov : diplomsko delo univerzitetnega študijskega programa I. stopnje

Vodenik, Jan

| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

First page > Show document

Show document

Title:	Ionske tekočine kot inhibitorji korozijskih procesov : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:	ID Vodenik, Jan (Author) ID Fuchs-Godec, Regina (Mentor) More about this mentor... ID Bren, Urban (Comentor)
Files:	UN_Vodenik_Jan_2025.pdf (5,34 MB) MD5: 0B23049D71FB28211B64A95825DD7D18
Language:	Slovenian
Work type:	Bachelor thesis/paper
Typology:	2.11 - Undergraduate Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	V diplomskem delu smo preučevali delovanje treh imidazolijevih ionskih tekočin (IT) kot korozijskih inhibitorjev na površini jekla AISI 316L v kislih medijih. Ionski tekočini BMIFMS in 1H3MIC sta bili uporabljeni kot dodatka v 0,5 M in 1,0 M raztopino HCl, kjer sta z adsorpcijo na kovinsko površino delovali kot inhibitorja. Tretja ionska tekočina, M3OITF, pa je bila v kombinaciji s stearinsko kislino uporabljena za tvorbo samosestavljivih hidrofobnih zaščitnih prevlek. Učinkovitost inhibitorjev smo spremljali z elektrokemijskimi metodami, FTIR spektroskopijo, vrstično elektronsko mikroskopijo (SEM) in merjenjem kontaktnega kota. Na osnovi rezultatov smo ugotovili, da ionski tekočini BMIFMS in 1H3MIC pri optimalnih koncentracijah tvorita stabilen adsorpcijski sloj, ki v 0,5 M HCl dosega več kot 99,5-odstotno inhibicijo korozije. Adsorpcija poteka predvsem preko kationskega dela molekul, kjer imidazolijev obroč vzpostavi interakcije s kovinsko površino, medtem ko alkilne verige oblikujejo hidrofobno zaščitno bariero. Analiza je pokazala, da adsorpcijski mehanizem obeh IT sledi Langmuir-jevi adsorpcijski izotermi, vrednosti ΔGads pa nakazujejo kombinacijo fizikalne in kemijske adsorpcije. Potrdili smo visoko učinkovitost in stabilnost samosestavljivih prevlek, pripravljenih iz M3OITF in stearinske kisline (SA), tudi po večdnevni izpostavitvi korozijskemu mediju 0,5 M HCl. Višji masni deleži M3OITF so izboljšali kompaktnost prevlek, spremenili kinetiko kristalizacije SA ter pospešili inhibicijski odziv. V 1,0 M HCl se pri BMIFMS, 1H3MIC in pri prevlekah M3OITF + SA jasno pokaže izrazit anodni učinek, kar potrjuje opazno znižanje anodnega vrha polarizacijske krivulje in premik korozijskega potenciala proti pozitivnejšim vrednostim. S študijo smo potrdili velik potencial ionskih tekočin kot trajnostnih korozijskih inhibitorjev v agresivnih medijih.
Keywords:	korozija, ionske tekočine, adsorpcija, potenciodinamska metoda
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[J. Vodenik]
Year of publishing:	2025
Number of pages:	1 spletni vir (1 datoteka PDF (XII, 72 str.))
PID:	20.500.12556/DKUM-94643
UDC:	665.7.038.5(043.2)
COBISS.SI-ID:	248315395
Publication date in DKUM:	08.09.2025
Views:	220
Downloads:	51
Metadata:
Categories:	KTFMB - FKKT
:	Copy citation

Average score:	(0 votes)
Your score:	Voting is allowed only for logged in users.
Share:

Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

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:	24.08.2025

Secondary language

Language:	English
Title:	Ionic liquids as corrosion inhibitors
Abstract:	In this bachelor thesis, we investigated the performance of three imidazolium-based ionic liquids as corrosion inhibitors for AISI 316L stainless steel in acidic media. The ionic liquids BMIFMS and 1H3MIC were used as additives in 0.5 M and 1.0 M HCl solutions, where they acted as inhibitors by adsorption on the metal surface. The third ionic liquid, M3OITF, was used in combination with stearic acid to form self-assembled protective layers. The inhibition efficacy was evaluated using electrochemical methods, FTIR spectroscopy, scanning electron microscopy (SEM), and contact angle measurements. The results show that the ionic liquids BMIFMS and 1H3MIC form a stable adsorption layer at their optimum concentrations, and achieve a corrosion inhibition of over 99.5 % in 0.5 M HCl. Adsorption occurs primarily through the cationic part, whereby the imidazolium ring interacts with the metal surface, while the alkyl chains form a hydrophobic protective barrier. The adsorption behaviour of the two ionic liquids follows the Langmuir isotherm, and the calculated ΔGads values suggest a combination of physical and chemical adsorption. The high efficacy and stability of the self-assembled layers prepared from M3OITF and stearic acid was also confirmed after prolonged exposure to 0.5 M HCl. Increasing the mass fraction of M3OITF improved the compactness of the coatings, changed the crystallisation kinetics of stearic acid, and accelerated the inhibitory response. In 1.0 M HCl, BMIFMS, 1H3MIC, and M3OITF + SA coatings showed a pronounced anodic effect, as evidenced by a significant reduction in the anodic peak of the polarisation curves and a positive shift in the corrosion potential. The study confirms a great potential of ionic liquids as sustainable corrosion inhibitors in aggressive media.
Keywords:	corrosion, ionic liquids, adsorption, potentiodynamic method

Comments

Leave comment

You must log in to leave a comment.

Comments (0)

0 - 0 / 0

There are no comments!

Back