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undergraduate thesis
Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama
završni rad
Split: University of Split, Faculty of Chemistry and Technology, 2020. urn:nbn:hr:167:668564
Margeta, Hrvoje
University of Split
Faculty of Chemistry and Technology
Library

Institutional repository: Repository of the Faculty of chemistry and technology

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Margeta, H. (2020). Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology, Library. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:668564

Margeta, Hrvoje. "Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Library, 2020. https://urn.nsk.hr/urn:nbn:hr:167:668564

Margeta, Hrvoje. "Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Library, 2020. https://urn.nsk.hr/urn:nbn:hr:167:668564

Margeta, H. (2020). 'Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Library, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:668564

Margeta H. Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology, Library; 2020 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:167:668564

H. Margeta, "Elektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Library, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:668564

Metadata
TitleElektrokemijsko određivanje korozije željeza u kiselin kloridnim otopinama : završni rad
Title (english)Determination of iron corrosion in acidic chloride media by electrochemical methods : bachelor thesis
AuthorHrvoje Margeta
MentorSlobodan Brinić (mentor)
Committee memberMarija Bralić (predsjednik povjerenstva)
Committee memberIvana Smoljko (član povjerenstva)
Committee memberSlobodan Brinić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
Library
Split
Defense date and country2020-09-30, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Cilj ovog rada je bio ispitati korozivno djelovanje kisele kloridne otopine na uzorak željeza elektrokemijskom metodom ekstrapolacije Tafelovih pravaca i metodom određivanja polarizacijskog otpora (Rp). Ispitivanja su provedena u tri kiselo kloridne otopine, međusobno različitih koncetracija HCl (0,1 M, 0,01 M i 0,0001 M) uz konstantnu količinu klorida (30 g NaCl/L otopine). S obje metode najveća struja korozije dobivena je u otopini s najvišom koncentracijom H + iona (otopina s 0,1 M HCl), koja opada porastom pH vrijednosti otopine. Vrijednosti polarizacijskog otpora (R p ) određenih iz rezultata dobivenih polarizacijom željeza u užem području potencijala i onih dobivenih metodom elektrokemijske impendancijske spektroskopije (EIS) su pokazale dobro slaganje i da porastom pH dolazi do povećanja polarizacijskog otpora. Povećanjem pH vrijednosti otopine mijenjaju se vrijednosti kako anodnog tako i katodnog Tafelovog nagiba što upućuje na promjenu mehanizma korozije, vjerojatno izazvane sve jačim utjecajem otopljenog O 2 , kao dodatnog depolarizatora.
Abstract (english)
The aim of this study was to examine the corrosive effect of an acidic chloride solution on an iron sample by two different methods: method of Tafel extrapolation and method of determining the polarization resistance (Rp). The tests were performed in three acidic chloride solutions, with different concentrations of HCl (0.1 M, 0.01 M and 0.0001 M) and constant amount of chloride (30 g NaCl/L solution). With both methods, the highest corrosion current was obtained in solution with the highest concentration of H + ions (0.1 M HCl). It was also shown that corrosion current decreases with the increase of pH. Values of polarization resistance (Rp) determined from the results obtained by polarization of iron in the narrow potential range and those obtained by electrochemical impendance spectroscopy (EIS) showed good agreement and that an increase in pH leads to an increase in polarization resistance. Increasing the pH of the solution changes the values of both anodic and cathodic Tafel slopes, which indicates a change in the corrosion mechanism, probably caused by the increasing influence of dissolved O 2 as an additional depolarizer.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:668564
Study programmeTitle: Chemical Technology; specializations in: Chemical Engineering, Environmental Protection
Course: Chemical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
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Created on2021-01-18 08:13:54