Alkidni premazi za zaštitu ugljičnog čelika od korozije

master's thesis

• Title (english): Alkyd coatings for corrosion protection of carbon steel
• Author: Josipa Marić
• Mentor: Ivan Stojanović (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-12-15, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

Rad se sastoji od teorijskog i eksperimentalnog dijela.
U teorijskom dijelu rada obrađene su opće informacije o koroziji te zaštiti organskim premazima. Opisane su komponente premaza, priprema površine uzoraka te različiti načini sušenja premaza. U 4. poglavlju predstavljeni su premazi na bazi alkida, jedni od najkorištenijih premaza zbog svojih svojstva i cjenovne prihvatljivosti. Također su opisani i vodorazrjedivi premazi zbog svoje ekološke prihvatljivosti i smanjene količine hlapivih organskih spojeva (HOS) u atmosferu.
U eksperimentalnom dijelu rada provedena je priprema površine ispitnih uzoraka. Na ispitne uzorke naneseni su premazi, te je odrađena kontrola kvalitete antikorozivne zaštite (AK). Izmjerena je debljina suhog filma premaza, provedena su ispitivanja otpornosti prema koroziji u vlažnoj i slanoj komori. Odrađeni su testovi prionjivosti premaza, mjerenje tvrdoće te određivanje stupnja mjehuranja i hrđanja nakon agresivnih uvjeta u komorama. Cilj ispitivanja bio je utvrditi kako broj slojeva premaza utječe na zaštitu čelika od korozije te u kojim uvjetima su odabrani premazi otporniji.
Na temelju odrađenih ispitivanja, proučene literature te dobivenih rezultata napravljena je analiza te je izveden zaključak.

Abstract (english)

The paper consists of a theoretical and an experimental part. In the theoretical part o paper, general information about corrosion and protection with organic coatings is processed. The coating components, the surface preparation of the samples, and the different drying methods of the coating are discrabed. In chapter 4., alkyd-based coating are presented, one of the most used coatings due to their properties and affordability. Water-based coatings are also described due to their environmental friendliness and reduced amount of volatile organic compounds (VOC) in the atmosphere. In the experimental part of the work, the surface of the test samples was prepared. Coatings were applied to the test samples, and the quality control of the anti-corrosion protection (AP) was performed. The dry film thickness of the coating was measured, and corrosion resistance tests were carried out in the humidity and salt-spray chamber. Coating adhesion tests, hardness measurements, and evaluation of the degradation of coatings in terms of bubbling and rusting after exposure in the chambers were performed.The aim of the test was to determine how the number of coating layers affect the protection of steel against corrosion and under which conditions the selected coatings are more resistant. Based on the conducted tests, the studied literature, and the obtained results, an analysis was made and a conclusion was drawn.

• Keywords: korozija; zaštita organskim premazima; alkidi; slana komora; vlažna komora
• Keywords (english): corrosion; protection with organic coatings; alkyd; salt chamber; humidity chamber
• Language: croatian
• URN:NBN: urn:nbn:hr:235:144562
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-11-30 17:22:09