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master's thesis
Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4
diplomski rad
2020. urn:nbn:hr:167:421042
Popec, Kristina
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Popec, K. (2020). Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:421042

Popec, Kristina. "Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:421042

Popec, Kristina. "Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:421042

Popec, K. (2020). 'Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 17 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:421042

Popec K. Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 November 17] Available at: https://urn.nsk.hr/urn:nbn:hr:167:421042

K. Popec, "Korozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:421042

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Metadata
TitleKorozijsko ponašanje Cu i CuAl legure u 0,5mol dm-3 NaCl otopini bez i u prisutnosti Na2SO4 : diplomski rad
Title (english)Corrosion behavior of Cu and CuAl alloy in 0,5 mol dm-3 NaCl solution without and in the presence of Na2SO4 : diploma thesis
AuthorKristina Popec
MentorLadislav Vrsalović (mentor)
Committee memberSenka Gudić (predsjednik povjerenstva)
Committee memberMario Nikola Mužek (član povjerenstva)
Committee memberLadislav Vrsalović (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2020-10-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Cilj ovog rada bio je ispitati korozijsko ponašanje 99,9% Cu i legure CuAl u 0,5 mol dm -3 NaCl otopini bez i u prisustvu 0,1 i 0,3 mol dm -3 Na 2 SO 4 , pri T = 20 o C i pH ≈ 7,0. Pri tome su korištene elektrokemijske metode mjerenja kao što su mjerenje potencijala otvorenog strujnog kruga, metoda linearne i potenciodinamičke polarizacije. Nakon polarizacijskih mjerenja površina elektroda ispitana je optičkim mikroskopom. Rezultati ispitivanja su pokazali da prisustvo sulfatnih iona u 0,5 mol dm -3 NaCl otopini značajnije ne utječe na potencijal otvorenog strujnog kruga Cu i CuAl elektrode, pri čemu Cu elektroda pokazuje nešto pozitivniji potencijal u odnosu na CuAl elektrodu. Povećanjem koncentracije sulfatnih iona u NaCl otopini dolazi do porasta vrijednosti polarizacijskog otpora kao i smanjenja vrijednosti gustoće korozijskih struja. Međutim pri pozitivnijim anodnim potencijalima, anodne gustoće struje veće su u prisustvu sulfatnih iona za Cu i CuAl leguru. Ispitivanjem elektroda svjetlosnim mikroskopom nakon polarizacijskih mjerenja utvrđena je opća korozija uz prisustvo površinskih korozijskih produkata pri većim koncentracijama sulfatnih iona.
Abstract (english)
The aim of this study was to examine the corrosion behavior of 99.9% Cu and CuAl alloy in 0.5 mol dm -3 NaCl solution without and in the presence of 0.1 and 0.3 mol dm -3 Na 2 SO 4 , at T = 20 o C and pH ≈ 7.0. For this purpose electrochemical methods such as measuring the potential of an open circuit, linear and potentiodynamic polarization were used. After polarization measurements, the electrode surfaces were examined with an optical microscope. The results showed that the presence of sulfate ions in 0.5 mol dm -3 NaCl solution did not significantly affect the open circuit potential of the Cu and CuAl electrode, and the Cu electrode showed a slightly more positive potential compared to the CuAl electrode. Increasing the concentration of sulfate ions in the NaCl solution leads to an increase in the value of the polarization resistance as well as a decrease in the value of the corrosion current density. However, at more positive anodic potentials, the anodic current densities are higher in the presence of sulfate ions for Cu and CuAl alloys. Examination of the electrodes by light microscopy after polarization measurements revealed general corrosion and the presence of surface corrosion products at higher concentrations of sulfate ions.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:421042
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures, Materials and Environmental protection
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
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Created on2020-12-10 13:21:46