magistrsko delo
Ajda Rus (Author), Boštjan Genorio (Mentor), Marjan Marinšek (Thesis defence commission member), Lidija Slemenik Perše (Thesis defence commission member)

Abstract

V magistrski nalogi je predstavljena optimizacija zaščite problematičnih robov kovinskih substratov z epoksi kataforeznim temeljnim premazom z uporabo treh različnih dodatkov. Ti so pigmentna pasta, mikrogel MG 1 in mikrogel MG 2. Izhodiščno razmerje veziva in pigmentne paste je 4/1. Z dodatkom pigmentne paste je testirano tudi razmerje veziva in pigmentne paste 3/1. Mikrogela MG 1 in MG 2 sta bila dodana v različnih koncentracijah: 3, 6, 8 in 10 ut. %. Najprej so ovrednotene fizikalne lastnosti utrjenega kataforeznega epoksi premaza z dodatkom. Izbrani fizikalni testi so sijaj, elastičnost po Erichsenu, prevoj, udar in oprijem. Testiranje izboljšanih antikorozijskih lastnosti je potekalo s pomočjo klasičnega testiranja v slani komori po standardu ASTM B-117 in z novo vzpostavljeno metodo AC-DC-AC, ki temelji na elektrokemijski impedančni spektroskopiji. Vzpostavljena je bila korelacija med slano komoro in metodo AC-DC-AC. Za vzorce z razmerjem veziva in pigmentne paste 4/1, in to ne glede na vrsto mikrogela, ima korelacija 10,8-odstotno napako, za vzorce z razmerjem veziva in pigmentne paste 3/1 ne glede na vrsto mikrogela pa 6,3-odstotno napako. S testiranjem antikorozijskih lastnosti je potrjeno, da imata vzorca z razmerjem veziva in pigmentne paste 3/1 in dodatkom 8 ut. % MG 1 in 8 ut. % MG 2 izboljšano pokritost robov.

Keywords

korozija kovin;elektrokemijska korozija;kataforezni epoksi temeljni premaz;mikrogel;antikorozijske lastnosti;pokrivnost robov;korozijski testi;slana komora;metoda AC-DC-AC;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [A. Rus]
UDC: 620.197.3(043.2)
COBISS: 88607235 Link will open in a new window
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Downloads: 48
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Other data

Secondary language: English
Secondary title: Evaluation of polymer functional additives on application properties of cataphoresis epoxy primer
Secondary abstract: Edge coverage of cataphoretic epoxy primer on steel substrate was optimised with three different functional additives: pigment paste, microgel MG 1 and microgel MG 2. The binder to pigment paste ratio was 4/1 and with addition of pigment paste it was changed to 3/1. Various contents of each microgel separately were incorporated into the electrocoating bath: 3, 6, 8 and 10 wt. %. Gloss, elasticity by Erichsen, bending, impact resistance and adhesion were used to study the effect of additives on mechanical properties of cured coating. Salt spray test and AC-DC-AC method were used to study improved anti-corrosion properties of cured coating on the edges. A correlation between salt spray test and AC-DC-AC method was determined. The correlation error for samples with binder to pigment ratio 4/1 is 10.8% when MG 1 or MG 2 is added. The correlation error for samples with binder to pigment ratio 3/1 is 6.3% when MG 1 or MG 2 is added. The salt spray test and AC-DC-AC method proved that samples with binder to pigment paste ratio 3/1 and addition of 8 wt. % MG and or MG 2 show improved anti-corrosion properties on the edge.
Secondary keywords: cataphoretic epoxy primer;microgel;anti-corrosion properties;edge coverage;salt spray test;AC-DC-AC method;
Type (COBISS): Master's thesis/paper
Study programme: 1000376
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo
Pages: XVI f., 96 str.
ID: 13708068