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master's thesis
ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET
diplomski rad
2024. urn:nbn:hr:167:496177
Šaravanja, Katarina
University of Split
Faculty of Chemistry and Technology
Library

Cite this document

Šaravanja, K. (2024). ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology, Library. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:496177

Šaravanja, Katarina. "ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, 2024. https://urn.nsk.hr/urn:nbn:hr:167:496177

Šaravanja, Katarina. "ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, 2024. https://urn.nsk.hr/urn:nbn:hr:167:496177

Šaravanja, K. (2024). 'ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, accessed 23 January 2025, https://urn.nsk.hr/urn:nbn:hr:167:496177

Šaravanja K. ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology, Library; 2024 [cited 2025 January 23] Available at: https://urn.nsk.hr/urn:nbn:hr:167:496177

K. Šaravanja, "ELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Library, Split, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:167:496177

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Metadata
TitleELEKTROKEMIJSKO PONAŠANJE ČELIKA U MORSKOJ VODI RAZLIČITOG SALINITETA UZ DODATAK CRYSTAL VIOLET : diplomski rad
Title (english)ELECTROCHEMICAL BEHAVIOR OF STEEL IN SEAWATER OF DIFFERENT SALINITY WITH THE ADDITION OF CRYSTAL VIOLET : diploma thesis
AuthorKatarina Šaravanja
MentorJelena Jakić (mentor)
Committee memberSenka Gudić (predsjednik povjerenstva)
Committee memberMario Nikola Mužek (član povjerenstva)
Committee memberJelena Jakić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
Library
Split
Defense date and country2024-10-30, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U radu je ispitano korozijsko ponašanje čelika S275 u morskim vodama različitog saliniteta tj. bočatoj, morskoj i gorkoj morskoj vodi pri temperaturama 15 °C i 35 °C bez i uz dodatak azo boje Crystal Violet kao inhibitora. Ispitivanja su provedena pod utjecajem gibanja elektrolita koji simulira prirodno kretanje vode. Provedena su ispitivanja mjerenja potencijala otvorenog strujnog kruga te mjerenja linearne i potenciodinamičke polarizacije. Ispitivanja su pokazala da porast temperature voda ima značajan utjecaj na porast gustoće korozijske struje, smanjenje vrijednosti polarizacijskog otpora i smanjenje vrijednost korozijskog potencijala. Najniže vrijednosti polarizacijskog otpora dobivene su u morskoj vodi pri temperaturi 35 °C što ukazuje da je morska voda najagresivniji medij za čelik S275 te može uzrokovati značajna korozijska oštećenja na materijalu. Primjena Crystal Violet kao inhibitora korozije pokazao je učinkovitost u morskoj vodi i bočatoj vodi, dok je u gorkoj morskoj vodi utjecaj neznatan. Analiza površine uzoraka nakon elektrokemijskih ispitivanja optičkom mikroskopijom potvrdile su rezultate elektrokemijskih mjerenja.
Abstract (english)
In the work, the corrosion behaviour of steel S275 was tested in seawater with different salinity, i.e. brackish water, seawater and seawater bittern at temperatures of 15 °C and 35 °C without and with the addition of the azo dye Crystal Violet as an inhibitor. The investigations were carried out under the influence of the movement of the electrolyte, which simulates the natural movement of water. Electrochemical tests with measurements of the open circuit potential as well as linear and potentiodynamic polarization measurements were carried out. The tests showed that increase in water temperature has a significant effect on the increase in the current corrosion density, the decrease in the value of the polarization resistance and the decrease in the value of the corrosion potential. The lowest values of polarization resistance were obtained in seawater at a temperature of 35 °C, indicating that seawater is the most aggressive medium for S275 steel, which can cause significant corrosion damage to the material. The use of Crystal Violet as a corrosion inhibitor has been shown to be effective in seawater and brackish water, while the effect in seawater bittern is negligible. Analysis of the surface of the samples after the electrochemical tests by optical microscopy confirmed the results of the electrochemical measurements.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:496177
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
Terms of useLicence In copyright icon
Created on2025-01-23 09:22:24