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undergraduate thesis
Utjecaj potencijala na formiranje oksidnih filmova na kositru
završni rad
2021. urn:nbn:hr:167:083153
Ostrički, Iva
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Ostrički, I. (2021). Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:083153

Ostrički, Iva. "Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:167:083153

Ostrički, Iva. "Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2021. https://urn.nsk.hr/urn:nbn:hr:167:083153

Ostrički, I. (2021). 'Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 20 April 2024, https://urn.nsk.hr/urn:nbn:hr:167:083153

Ostrički I. Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2021 [cited 2024 April 20] Available at: https://urn.nsk.hr/urn:nbn:hr:167:083153

I. Ostrički, "Utjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:167:083153

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Metadata
TitleUtjecaj potencijala na formiranje oksidnih filmova na kositru : završni rad
Title (english)Influence of potential on passivation of tin : bachelor thesis
AuthorIva Ostrički
MentorSenka Gudić (mentor)
Committee memberLadislav Vrsalović (predsjednik povjerenstva)
Committee memberMario Nikola Mužek (član povjerenstva)
Committee memberSenka Gudić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2021-09-15, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U radu je ispitan utjecaj potencijala pasivacije (od 0.0 do 1.6 V) i vremena anodizacije (do 4 sata) na svojstva oksidnih filmova koji se pri potenciostatskim uvjetima formiraju na Sn u 0.1 M otopini natrijevog acetata (pH = 8.3, T = 20 o C). Za vrijeme formiranja oksidnih filmova snimani su struja– vrijeme odgovori, određena je količina naboja koja se utroši u procesu anodizacije te izračunata debljina oksidnog filma. Pasivacija kositra započinje formiranjem Sn(OH) 2 ili SnO (kod ≈ -0.70 V), a stvarno pasivno stanje se postiže formiranjem Sn(OH) 4 filma (kod pozitivnijih potencijala). Pod utjecajem daljnje anodne polarizacije dolazi do transformacije hidratiziranog Sn(OH) 4 filma u termodinamički stabilniji dehidratizirani oblik, SnO 2 · H 2 O. Potencijal pasivacije i vrijeme anodizacije određuju stabilnost oksidnog filma na kositru. Oksidni filmovi s boljim zaštitnim svojstvima (veća debljina, bolja morfologija i veći otpor) dobiveni su u slučaju kada je pasivacija provedena na pozitivnijim potencijalima u pasivnom području, a vrijeme anodizacije duže.
Abstract (english)
The effect of passivation potential (from 0.0 to 1.6 V) and anodization time (up to 4 hours) on the properties of oxide films formed on Sn in 0.1 M sodium acetate solution (pH = 8.3, T = 20 o C) was investigated. During the formation of oxide films, current-time responses were recorded, the amount of charge consumed in the anodizing process was determined, and the thickness of the oxide film was calculated. The passivation of tin starts with the formation of Sn(OH) 2 or SnO (at ≈ -0.70 V), while the actual passive state is achieved by the formation of Sn(OH) 4 film (at more positive potentials). Under the influence of further anodic polarization, the hydrated Sn(OH) 4 film is transformed into a thermodynamically more stable dehydrated form, SnO 2 ·H 2 O. The passivation potential and the anodizing time determine the stability of the oxide film on the tin. Oxide films with better protective properties (greater thickness, better morphology and higher resistance) were obtained in the case when passivation was carried out at more positive potentials in the passive region, and at longer anodizing times.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:083153
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 on2021-12-15 11:03:35