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undergraduate thesis
Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. urn:nbn:hr:149:358793
Perković, Ivana
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

Perković, I. (2023). Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:358793

Perković, Ivana. "Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:358793

Perković, Ivana. "Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:358793

Perković, I. (2023). 'Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 26 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:358793

Perković I. Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2023 [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:149:358793

I. Perković, "Utjecaj elektrolita na rezultate elektrokemijskih ispitivanja", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:149:358793

Metadata
TitleUtjecaj elektrolita na rezultate elektrokemijskih ispitivanja
Title (english)The influence of electrolyte on the results of electrochemical measurements
AuthorIvana Perković
MentorHelena Otmačić Ćurković (mentor)
Committee memberHelena Otmačić Ćurković (predsjednik povjerenstva)
Committee memberLjerka Kratofil Krehula (član povjerenstva)
Committee memberMarko Viskić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2023-09-11, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovome radu istraživan je utjecaj izbora elektrolita na rezultate dobivene elektrokemijskim ispitivanjima, preciznije elektrokemijskom impedancijskom spektroskopijom, te polarizacijskim mjerenjima koja se baziraju na istosmjernoj struji. Koristile su se tri vrste elektrolita: jedan tekući – umjetna kiša, te dva hidrogel elektrolita – jedan na bazi agara i drugi na bazi poli(vinilalkohola). Ispitivanja s tekućim elektrolitom provođena su u klasičnoj elektrokemijskoj ćeliji s troelektrodnim sustavom – radnom elektrodom od ispitivanog materijala, referentnom zasićenom kalomel elektrodom (ZKE) i grafitnom protuelektrodom. Ispitivanja s hidrogel elektrolitima provođena su u elektrokemijskim ćelijama, gdje su kao referentna elektroda i protuelektroda korištene žice od nehrđajućeg čelika AISI 316L. Ispitivano je pet vrsta radnih elektroda – bakar, bronca, ugljični čelik, nitratna (zelena) patina, te sulfidna (crna) patina. Utvrđeno je da su rezultati dobiveni korištenjem agar i poli(vinil-alkohol) hidrogelova međusobno sličniji nego oni dobiveni korištenjem tekućeg elektrolita, iako sva tri elektrolita daju približne rezultate. Također se zaključuje da je otpor elektrolita uglavnom najvećeg iznosa prilikom korištenja tekućeg elektrolita, a najveći otpori prijenosu naboja i otpori oksida uglavnom se javljaju prilikom korištenja agar elektrolita. Najveći polarizacijski otpori dobivaju se također korištenjem agar elektrolita, a najvećih su iznosa na patinama kao radnim elektrodama. Najveći polarizacijski otpori, u sva tri elektrolita, javljaju se na nitratnoj (zelenoj) patini, a najniži na ugljičnom čeliku.
Abstract (english)
This paper investigated the impact of electrolyte on the results obtained by electrochemical tests, more precisely by electrochemical impedance spectroscopy and polarization measurements that are based on direct current. Three types of electrolytes were used: one liquid – artificial rain, and two hydrogel electrolytes – one based on agar and the other based on poly(vinyl alcohol). Tests with liquid electrolyte were performed in a classical electrochemical cell with a three-electrode system – working electrode made of test material, a reference saturated calomel electrode (SCE) and a graphite counter electrode. Tests with hydrogel electrolytes were performed in electrochemical cells, with the reference electrode and counter-electrode AISI 316L stainless steel wires. Five types of working electrodes – copper, bronze, carbon steel, nitrate ( green ) patina, and sulfide ( black) patina were tested. The results obtained using agar and poly(vinylalcohol) hydrogels were found to be more similar than those obtained using liquid electrolytes, although all three electrolytes give comparable results. It is also concluded that electrolyte resistance is generally the highest when using a liquid electrolyte, while the greatest resistances to charge transfer and oxide resistance generally occur when using agar electrolytes. The greatest polarization resistances are also obtained by using agar electrolytes, and the largest are observed on patinas as working electrodes. The highest polarization resistances, in all three electrolytes, occur on nitrate (green) patina, and the lowest on carbon steel.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:358793
ProjectNumber: IP-2019-04-5030
Title: Razvoj novih rješenja za karakterizaciju i zaštitu brončane kulturne baštine izložene vanjskom okolišu
Title: Development of New Solutions for Characterization and Protection of Bronze Cultural Heritage Exposed to Outdoor Environment
Acronym: BroCH
Leader: Helena Otmačić Ćurković
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: IP
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-09-14 08:40:15