Polisurfaktanti, kot inhibitorji korozijskih procesov

diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje

Ana Vida (Author), Regina Fuchs-Godec (Mentor), Urban Bren (Co-mentor)

Abstract

V okviru diplomskega dela smo preučili inhibicijsko učinkovitost dveh neionskih polisurfaktantov kot zaviralcev korozijskega procesa z uporabo klasične potenciodinamske metode. Učinkovitost polisurfaktanta Pluronica F127 in PEG 1500 smo preučili v mediju 3,5 % NaCl. Nadalje smo v mediju 0,1 M HCl preiskali vpliv temperature na inhibicijsko delovanje PEG 1500 ter sinergijski učinek PEG 1500 ob dodatku surfaktanta Tritona X-100. Za zaključek smo preverili sposobnost tvorbe efektivnih adsorpcijskih prevlek preizkušenih inhibitorjev. Površine različnih vzorcev smo analizirali z merjenjem kontaktnega kota vodne kapljice, metodo infrardeče spektroskopije s Fourierjevo transformacijo ter z vrstično elektronsko mikroskopijo. Na podlagi rezultatov smo opredelili mehanizme adsorpcije ter potrdili inhibicijsko učinkovitost vseh uporabljenih neionskih spojin. Rezultati potrjujejo inhibicijsko delovanje, ki se izboljšuje s povečevanjem koncentracije uporabljenih inhibitorjev. V 3,5 % NaCl smo dosegli najboljšo inhibicijsko učinkovitost 94,6 % ob uporabi 0,3 mM Pluronica F127 ter inhibicijsko učinkovitost 90,73 % ob uporabi PEG 1500 koncentracije 0,1 M. Nadalje smo s PEG enake koncentracije v mediju 0,1 M HCl dosegli najboljšo inhibicijsko učinkovitost 74,62 % pri 303 K. Za konec pa smo potrdili sinergijsko delovanje PEG 1500 in Tritona X-100 ter njuno sposobnost tvorbe efektivnih adsorpcijskih prevlek.

Keywords

korozija;polisurfaktanti;adsorpcija;potenciodinamska metoda;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2024
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[A. Vida]
UDC:	620.193(043.2)
COBISS:	213887235
Views:	25
Downloads:	16
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Polymeric surfactants as inhibitors of corrosion processes
Secondary abstract:	In this undergraduate thesis, the corrosion inhibition efficacy of two nonionic polymeric surfactants was studied using the classic potentiodynamic method. The effectiveness of the polysurfactants Pluronic F127 and PEG 1500 was examined in a 3,5 % NaCl medium. Additionally, in 0,1 M HCl, we investigated the influence of temperature on the inhibitory action of PEG 1500 and the synergistic effect of PEG 1500 combined with the nonionic surfactant Triton X-100. Moreover, we evaluated the ability of the tested inhibitors to form effective adsorption coatings. The surfaces of various samples were analyzed using contact angle measurements, the ATR-FTIR method, and scanning electron microscopy. Based on the results, we defined the adsorption mechanisms and confirmed the inhibition efficacy of all of the nonionic compounds used. The results confirmed the inhibition performance, which improved with increasing concentrations. In 3,5 % NaCl, we achieved the highest efficacy of 94,6 % using 0,3 mM Pluronic F127 and an efficacy of 90,73 % using PEG 1500 at a concentration of 0,1 M. Furthermore, with PEG 1500 at the same concentration in a 0,1 M HCl medium, we achieved the highest efficacy of 74,62 % at 303 K. Additionally, we confirmed the synergistic action of PEG 1500 and Triton X-100 and their ability to form effective adsorption coatings.
Secondary keywords:	corrosion;polymeric surfactants;adsorption;potentiodynamic method;
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	1 spletni vir (1 datoteka PDF (X, 38 f.))
ID:	24786786