| Abstract | Rad se sastoji od teorijskog i eksperimentalnog dijela.
U teorijskom dijelu rada obrađena je zaštita od korozije premazima koji suše pri atmosferskim uvjetima i premazima koji suše infracrvenim (IC) zračenjem. Opisani su mehanizmi sušenja, zaštitnog djelovanja i sustavi premaza. Naglasak je stavljen na vodorazrjedive premaze zbog njihovog pozitivnog utjecaja na okoliš i smanjene količine hlapivih organskih spojeva (HOS) u atmosferi. Usporedno su prikazana njihova svojstva, prednosti i nedostaci te su nabrojane vrste. Također, objašnjen je mehanizam rada IC zračenja, a opisana je i oprema za IC sušenje. Poseban naglasak stavljen je na mogućnosti industrijske primjene.
U eksperimentalnom dijelu rada provedena je priprema ispitne površine, nanošenje premaza te IC sušenje. Izmjerena je debljina mokrog i suhog filma. Cilj ispitivanja bilo je utvrditi kako na brzinu IC sušenja utječu parametri poput udaljenosti od IC zračenja, debljine lima i načina zračenja. Osmišljena su i provedena ispitivanja korozijske otpornosti premaza. U tu svrhu provedena su ispitivanja otpornosti prema koroziji u slanoj i vlažnoj komori te ispitivanja tvrdoće, testovi prionjivosti premaza i elektrokemijska impedancijska spektroskopija. Napravljena je analiza i izvedeni su zaključci. |
| Abstract (english) | The thesis consists of a theoretical and an experimental part.
In the theoretical part of the thesis, corrosion protection with coatings that dry under atmospheric conditions and coatings that dry with infrared (IR) radiation is elaborated. Drying and protective mechanisms, along with the coating systems are described. Emphasis is placed on water-based coatings due to their positive impact on the environment and reduced amounts of volatile organic compounds (VOCs) in the atmosphere. Their properties, advantages, and disadvantages are shown comparatively, and the existing types are listed. Also, the mechanism of IR radiation is explained, and the equipment for IR drying is described. Special emphasis was placed on the possibilities of industrial application.
In the experimental part of the thesis, the surface test preparation, coating application, and IR drying were performed. The wet and dry film thickness was measured. The aim of the study was to determine how the speed of IR drying is affected by parameters such as distance from IR radiation, sheet thickness, and radiation mode. Corrosion resistance tests of coatings have been designed and performed. For this purpose, corrosion resistance tests in salt and wet chambers, hardness tests, coating adhesion tests, and electrochemical impedance spectroscopy were performed. An analysis was made and conclusions were drawn. |
