prikaz prve stranice dokumenta Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom
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master's thesis
Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. urn:nbn:hr:149:572428
Ribičić, Karla
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Ribičić, K. (2020). Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:572428

Ribičić, Karla. "Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:572428

Ribičić, Karla. "Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:572428

Ribičić, K. (2020). 'Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 17 June 2024, https://urn.nsk.hr/urn:nbn:hr:149:572428

Ribičić K. Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2020 [cited 2024 June 17] Available at: https://urn.nsk.hr/urn:nbn:hr:149:572428

K. Ribičić, "Ispitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:149:572428

Metadata
TitleIspitivanje industrijskih premaznih sustava elektrokemijskom impedancijskom spektroskopijom
Title (english)Probing of industrial coating systems by electrochemical impedance spectroscopy
AuthorKarla Ribičić
MentorSanja Martinez (mentor)
Committee memberSanja Martinez (predsjednik povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
Committee memberVladimir Dananić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2020-12-21, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Korozija i morska voda usko su povezane zbog visokog saliniteta i bioloških čimbenika koji uzrokuju propadanje metalnih odobalnih i industrijskih konstrukcija. U ovom radu obrađeno je 38 čeličnih uzoraka nepoznatog sastava i broja premaza koji su stajali 365 dana u moru. Izmjerena je debljina zaštitnog polimernog sustava svih uzoraka, izbrušen je mali dio premaza kako bi se omogućio direktan električni kontakt i ispitana su antikorozivna svojstva elektrokemijskom impedancijskom spektroskopijom dok su suhi, nakon jednog tjedna te nakon dva tjedna izlaganja vlažnoj atmosferi. Pojava i opseg korozije, prisutnost oštećenja koje dovodi do gubitka adhezije ili kohezije te razlike u odzivu suhih uzoraka, nakon stajanja jedan tjedan i dva tjedna u vlažnoj atmosferi istraženi su na temelju dobivenih podataka impedancije, faznog kuta te frekvencije prodora. Debljina premaza imala je utjecaj na barijerna svojstva premaza, ali nije pouzdan parametar za određivanje opsega i usporedbu uzoraka zbog različitog kemijskog sastava u nekih premaza. Od 38 ispitivanih uzorka, najbolje rezultate prema svim podacima pokazala je grupa od tri uzorka oznaka S14, S27 i S28 s impedancijom većom od 10^9 Ωcm^2 i bez frekvencije prodora, a najgore grupa od tri uzorka oznaka S3, S17 i S30 s impedancijom manjom od 10^5 Ωcm^2 i frekvencijom prodora od oko 10 000 Hz.
Abstract (english)
Corrosion and seawater are closely related due to high salinity and biological factors that cause the deterioration of metal offshore and industrial structures. In this paper, 38 steel samples of unknown composition and number of coatings that stood for 365 days at sea were processed. The thickness of the protective polymer system of all samples was measured, a small part of the coating was sanded to allow direct electrical contact and the anticorrosive properties were examined by electrochemical impedance spectroscopy while dry, after one week and after two weeks of exposure to humid atmosphere. The occurrence and extent of corrosion, the presence of damage leading to loss of adhesion or cohesion and differences in the response of dry samples, after standing for one week and two weeks in a humid atmosphere were investigated based on the obtained impedance data, phase angle and breakpoint frequency. The thickness of the coating had an effect on its barrier properties, but it is not a reliable parameter for determining the extent of corrosion and comparing the samples due to the different chemical composition in some coatings. Out of the 38 investigated samples, the best results according to all the data, were shown by a group of samples designated as S14, S27 and S28 with impedance greater than 10^9 Ω cm^2 and no breakpoint frequency, and the worst were by a group of samples designated as S3, S17 and S30, with impedance less than 10^5 Ωcm^2 and breakpoint frequency of about 10 000 Hz.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:572428
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Applied organic chemistry
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to students and staff of home institution
Terms of useLicence In copyright icon
Created on2022-07-19 13:38:36