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master's thesis
Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline
diplomski rad
2019. urn:nbn:hr:167:700050
Oreb, Katarina
University of Split
Faculty of Chemistry and Technology
Library

Cite this document

Oreb, K. (2019). Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology, Library. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:700050

Oreb, Katarina. "Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, 2019. https://urn.nsk.hr/urn:nbn:hr:167:700050

Oreb, Katarina. "Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, 2019. https://urn.nsk.hr/urn:nbn:hr:167:700050

Oreb, K. (2019). 'Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, accessed 20 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:700050

Oreb K. Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology, Library; 2019 [cited 2024 November 20] Available at: https://urn.nsk.hr/urn:nbn:hr:167:700050

K. Oreb, "Inhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, Split, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:167:700050

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Metadata
TitleInhibicija korozije 5052 aluminijske legure pomoću askorbinske kiseline : diplomski rad
Title (english)Corrosion inhibition of 5052 aluminium alloy by ascorbic acid : diploma thesis
AuthorKatarina Oreb
MentorSenka Gudić (mentor)
MBZ: 181062
Committee memberLadislav Vrsalović (predsjednik povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
Library
Split
Defense date and country2019-03-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Primjenom polarizacijskih metoda i elektrokemijske impedancijske spektroskopije ispitana je mogućnost inhibicije korozije 5052 aluminijske legure (AlMgCr) pomoću askorbinske kiseline (u granicama od 110 -6 do 110 -2 M) u 0.5 M NaCl otopini pri 20 o C. Određeni su korozijski potencijali, korozijska struja, polarizacijski otpor, otpor prijenosu naboja, kapacitet površinskog sloja i difuzija kroz površinski sloj. Izračunata je pokrivenost površine molekulama inhibitora te djelotvornost inhibicije korozije. Dobiveni rezultati su pokazali da askorbinska kiselina učinkovito usporava koroziju AlMgCr legure u kloridnoj otopini uz djelotvornost od  92 %. Nadalje, ustanovljeno je da askorbinska kiselina pripada miješanom tipu inhibitora s pojačanim utjecajem na anodnu reakciju. Mehanizam adsorpcije ispitivanog inhibitora opisan je Frundlichovom adsorpcijskom izotermom. Dobivena vrijednost za standardnu slobodnu energiju adsorpcije u iznosu ≈ -10 kJ mol -1 ukazuje na fizikalnu adsorpciju askorbinske kiseline na površinu AlMgCr legure u NaCl otopini.
Abstract (english)
The corrosion inhibition performance of the ascorbic acid (in range from 110 -6 to 110 -2 M) on 5052 aluminium alloy (AlMgCr) corrosion in neutral 0.5 M solution at 20 o C was investigated using potentiodynamic and electrochemical impedance spectroscopy measurements. Corrosion potential, corrosion current, polarization resistance, charge transfer resistance, capacity of surface layer, and diffusion through the surface layer were determined. The surface coverage of the inhibitor molecules and inhibition efficiency were calculated. The obtained results show that ascorbic acid effectively inhibited the corrosion reaction of AlMgCr alloy in the chloride solution with an inhibition efficiency of up to  92 %. Furthermore, ascorbic acid was found to function essentially as a mixed type with a higher influence on anodic reaction. The adsorption behaviour of investigated inhibitor can be described by the Frundlich adsorption isotherm. The adsorption free energy closes to -10 kJ mol -1 indicates physical adsorption of the ascorbic acid on AlMgCr aluminium alloy surface in NaCl solution.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:700050
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures
Course: Materials
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
Terms of useLicence In copyright icon
Public noteKljučne riječi doradio knjižničar/ Key words are revised by the librarian
Created on2019-09-19 10:24:43