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master's thesis
Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini
diplomski rad
2020. urn:nbn:hr:167:045453
Rakuljić, Blanka
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

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Rakuljić, B. (2020). Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:045453

Rakuljić, Blanka. "Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:045453

Rakuljić, Blanka. "Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:045453

Rakuljić, B. (2020). 'Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 27 October 2024, https://urn.nsk.hr/urn:nbn:hr:167:045453

Rakuljić B. Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 October 27] Available at: https://urn.nsk.hr/urn:nbn:hr:167:045453

B. Rakuljić, "Utjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:045453

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Metadata
TitleUtjecaj Mn na korozijsko ponašanje CuSlMn legure u NaCl otopini : diplomski rad
Title (english)Influence of Mn on the corrosion behavior of CuAlMn alloy in NaCl solution : diploma thesis
AuthorBlanka Rakuljić
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 country2020-09-22, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Korozijsko ponašanje različitih CuAlMn legura s prisjetljivosti oblika (Cu-12%Al-4%Mn, Cu-12.3%Al-5.2%- Mn i Cu-12%Al-6%Mn) u 0.9 % NaCl otopini (pri pH = 7.4 i T = 37 °C) ispitano je praćenjem vremenske promjene potencijala otvorenog strujnog kruga te primjenom polarizacijskih metoda i elektrokemijske impedancijske spektroskopije. Ustanovljeno je da na potencijalu otvorenog strujnog kruga korozijska otpornost ispitivanih uzoraka raste s porastom sadržaja Mn u leguri, tj. redom: Cu-12%Al-4%Mn < Cu-12.3%Al-5.2%- Mn < Cu-12%Al-6%Mn. Naime, istim redom smanjuje se korozijska struja, a povećava polarizacijski otpor te kompaktnost i debljina površinskog sloja. Međutim, pri visokim anodnim potencijalima (nakon prolaska kroz Tafelovo područje, E > 0.1 V), brzina korozije raste sa sadržajem Mn u leguri. Ispitivanjem uzoraka svjetlosnim mikroskopom uočena su oštećenja na površini Cu-12.3%Al-5.2%-Mn i Cu-12%Al-6%Mn legura, dok je površina Cu-12%Al-4%Mn legure gotovo neoštećena korozijom, što je potvrđeno i SEM/EDS analizom površine uzoraka.
Abstract (english)
The corrosion behavior of different CuAlMn shape memory alloys (Cu-12%Al-4%Mn, Cu-12.3%Al-5.2%-Mn and Cu-12%Al-6%Mn) in 0.9 % NaCl solution at pH = 7.4 and T = 37 °C was investigated using open circuit potential measurements, polarization and electrochemical impedance spectroscopy methods. It has been found that the corrosion resistance of the tested samples at open circuit potential increases with increasing Mn content in the alloy, i.e. growing in the order of: Cu-12%Al-4% Mn < Cu-12.3%Al-5.2%Mn < Cu-12%Al-6% Mn. Namely, the corrosion current decreases in the same order, while the polarization resistance and the resistance, thickness and compactness of the surface oxide layer increase. However, at high anodic potentials (after passing Tafel region, E > 0.1 V), the corrosion rate increases with Mn content in the alloy, and light microscopy investigations reveal pits on the surface of Cu-12.3%Al-5.2%-Mn and Cu-12%Al-6%Mn alloys, while Cu- 12%Al-4%Mn surface is almost clear of any corrosion damage, which was also confirmed by SEM/EDS analysis of the samples surface.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:045453
ProjectNumber: GOJIC-CRO-SLO 2018/2019
Title: Analiza prijelomnih površina mikrolegiranih čelika
Leader: Mirko Gojić
Jurisdiction: Croatia
Funder: MZO
Funding stream: Nema
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 on2020-10-13 07:17:51