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master's thesis
PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE
Karlovac: Karlovac University of Applied Sciences, 2022. urn:nbn:hr:128:631111
Vereš, Mario
Karlovac University of Applied Sciences
The Department of Mechanical Engineering

Institutional repository: Repository of Karlovac University of Applied Sciences

Cite this document

Vereš, M. (2022). PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE (Master's thesis). Karlovac: Karlovac University of Applied Sciences. Retrieved from https://urn.nsk.hr/urn:nbn:hr:128:631111

Vereš, Mario. "PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE." Master's thesis, Karlovac University of Applied Sciences, 2022. https://urn.nsk.hr/urn:nbn:hr:128:631111

Vereš, Mario. "PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE." Master's thesis, Karlovac University of Applied Sciences, 2022. https://urn.nsk.hr/urn:nbn:hr:128:631111

Vereš, M. (2022). 'PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE', Master's thesis, Karlovac University of Applied Sciences, accessed 25 December 2024, https://urn.nsk.hr/urn:nbn:hr:128:631111

Vereš M. PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE [Master's thesis]. Karlovac: Karlovac University of Applied Sciences; 2022 [cited 2024 December 25] Available at: https://urn.nsk.hr/urn:nbn:hr:128:631111

M. Vereš, "PRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE", Master's thesis, Karlovac University of Applied Sciences, Karlovac, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:128:631111

Metadata
TitlePRIMJENA KITOZANA I KOFEINA U ZAŠTITI ČELIKA OD KISELINSKE KOROZIJE
Title (english)APPLICATION OF CHITOSAN AND CAFFEINE IN THE PROTECTION OF STEEL AGAINST ACID
AuthorMario Vereš
MentorJasna Halambek (mentor)
Committee memberTomislav Božić (predsjednik povjerenstva)
Committee memberMarina Tevčić (član povjerenstva)
Committee memberJasna Halambek (član povjerenstva)
Committee memberBarica Jurković (član povjerenstva)
GranterKarlovac University of Applied Sciences
(The Department of Mechanical Engineering)
Karlovac
Defense date and country2022-09-20, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
Diplomski rad sadrži teorijski i eksperimentalni dio. U teorijskom dijelu rada opisan je čelik i njegova sistematizacija, definirana je korozija, korozijski procesi i prikazana je geometrijska klasifikacija korozije. Navedeni su i opisani različiti načini zaštite od korozije, opisani su načini zaštite pomoću inhibtora korozije, posebice ekološki prihvatljivih inhibitora, te je opisana zaštita pomoću prevlaka i premaza. U eksperimentalnom dijelu ispitano je korozijsko djelovanje 10% otopini solne kiseline na čelik Č.4732 u pri sobnoj temperaturi od 25°C i povišenoj temperaturi od 60°C uz dodavanje različitih koncentracija kofeina i kitozana kao ekološki prihvatljivih inhibitora korozije. Kofein je pokazao najbolje rezultate zaštite pri sobnim temperaturama, dok je kitozan pokazao najbolje rezultate pri povišenoj temperaturi. Njihovom kombinacijom dobivene su najmanje hrapavosti površine na čeliku, no nije postignuta i najbolja zaštita.
Abstract (english)
Thesis contains a theoretical and an experimental part. In the theoretical part of the paper, steel and its systematization are described, corrosion, corrosion processes are defined and the geometric classification of corrosion is presented. Various methods of corrosion protection are listed and described, methods of protection using corrosion inhibitors, especially environmentally friendly inhibitors (‘green inhibitors’), and protection using coatings are described. In the experimental part, the corrosion effect of 10% hydrochloric acid solution on steel Č.4732 was tested at room temperature of 25°C and elevated temperature of 60°C with the addition of different concentrations of caffeine and chitosan as environmentally acceptable corrosion inhibitors. Caffeine showed the best protection results at room temperatures, while chitosan showed the best results at elevated temperatures. Their combination resulted in the lowest surface roughness on the steel, but the best protection was not achieved.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:128:631111
Study programmeTitle: Mechanical Engineering
Study programme type: professional
Study level: specialist graduate
Academic / professional title: stručni/a specijalist/specijalistica inženjer/inženjerka strojarstva (stručni/a specijalist/specijalistica inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-11-29 11:57:01