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master's thesis
Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. urn:nbn:hr:149:455223
Kapitanović, Angela
University of Zagreb
Faculty of Chemical Engineering and Technology

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

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Kapitanović, A. (2020). Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:455223

Kapitanović, Angela. "Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:455223

Kapitanović, Angela. "Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:455223

Kapitanović, A. (2020). 'Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:455223

Kapitanović A. Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2020 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:149:455223

A. Kapitanović, "Temperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:149:455223

Metadata
TitleTemperaturna histereza elektrodnog potencijala različitih pseudo-referentnih elektroda
Title (english)Temeperature hysteresis of electrode potential of various pseudo-reference electrodes
AuthorAngela Kapitanović
MentorHelena Otmačić Ćurković (mentor)
Committee memberHelena Otmačić Ćurković (predsjednik povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
Committee memberLidija Furač (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2020-02-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Ovaj rad bazira se na problemu iz prakse gdje je bilo potrebno primijeniti katodnu zaštitu kako bi se spriječila unutarnja korozija stjenka čeličnih bojlera. Cilj rada bio je odabrati odgovarajuću pseudo-referentnu elektrodu koja bi se mogla primijeniti u sustavu unutarnje katodne zaštite. U tu svrhu ispitano je ponašanje različitih metala, titana, legure krom-nikal, legure bakar-nikal te cinka kao potencijalnih pseudo-referentnih elektroda. Tijekom ispitivanja pratio se njihov korozijski potencijal u ovisnosti o temperaturi za raspon temperatura 20 °C - 80 °C. Snimane su temperaturne histereze odnosno promjena korozijskog potencijala u ovisnosti o temperaturi tijekom ciklusa zagrijavanja i hlađenja. Odabir odgovarajuće pseudo-referentne elektrode ovisi o reproducibilnosti rezultata i veličini temperaturne histereze korozijskog potencijala. Na temelju najmanje temperaturne histereze cink se pokazao najadekvatnijim odabirom za ove svrhe. Najveća razlika korozijskog potencijala tijekom ciklusa zagrijavanja i hlađenja uočena je kod titana, a značajnije rasipanje podataka u dobivenim rezultatima uočeno je za legure krom-nikal te bakar-nikal. Cink se u ispitivanim uvjetima kontinuirano otapa kao i čelik pa se analogno mijenjaju i korozijski potencijal cinka i ugljičnog čelika od kojeg su izrađene unutarnje stjenke bojlera. Ostali ispitivani metali se tijekom otapanja prevlače više ili manje postojanim oksidnim filmom.
Abstract (english)
This work is based on the practical problem where it was necessary to apply the cathodic protection to prevent the internal corrosion of steel boilers. The aim of the work was to choose the appropriate pseudo-reference electrode that could be applied in internal cathodic protection system. Metals which were tested for this purpose as pseudo-reference electrodes were titanium, chromium-nickel alloy, copper-nickel alloy and zinc. Their corrosion potential dependence on temperature was examined in temperature range 20 °C - 80 °C. In order to obtain corrosion potential temperature hysteresis, corrosion potential dependence on temperature was monitored during the cycle of heating and cooling. The selection of pseudo-reference electrode depends on the reproducibility of results and the magnitude of corrosion potential temperature hysteresis. Based on the smallest observed temperature hysteresis zinc was found the most adequate for this purpose. The biggest difference of corrosion potential during the cycle of heating and cooling was observed for titanium and the significant scattering of the data was observed for chromium-nickel alloy and copper-nickel alloy. In studied conditions zinc is continuously corroding, similar to steel, such that corrosion potentials of zinc and carbon steel, from which are made internal walls of the boilers, are changing in a similar fashion. Corrosion of other studied metals leads to their coverage with less or more stable oxide film.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:455223
Study programmeTitle: Chemical Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2022-03-05 08:50:03