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master's thesis
Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima
Sisak: University of Zagreb, Faculty of Metallurgy, 2021. urn:nbn:hr:115:824096
Brajenić, Petra
University of Zagreb
Faculty of Metallurgy

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

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Brajenić, P. (2021). Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima (Master's thesis). Sisak: University of Zagreb, Faculty of Metallurgy. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:824096

Brajenić, Petra. "Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2021. https://urn.nsk.hr/urn:nbn:hr:115:824096

Brajenić, Petra. "Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima." Master's thesis, University of Zagreb, Faculty of Metallurgy, 2021. https://urn.nsk.hr/urn:nbn:hr:115:824096

Brajenić, P. (2021). 'Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima', Master's thesis, University of Zagreb, Faculty of Metallurgy, accessed 14 November 2024, https://urn.nsk.hr/urn:nbn:hr:115:824096

Brajenić P. Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima [Master's thesis]. Sisak: University of Zagreb, Faculty of Metallurgy; 2021 [cited 2024 November 14] Available at: https://urn.nsk.hr/urn:nbn:hr:115:824096

P. Brajenić, "Ispitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima", Master's thesis, University of Zagreb, Faculty of Metallurgy, Sisak, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:115:824096

Metadata
TitleIspitivanje alatnog čelika X19NiCrMo4 na otpornost prema lokalnoj koroziji u različitim medijima
Title (english)Testing of X19NiCrMo4 tool steel on resistance to local corrosion in different media
AuthorPetra Brajenić
MentorAnita Begić Hadžipašić (mentor)
MentorSandra Brajčinović (pomoć pri izradi, neposredni voditelj)
Committee memberIvan Jandrlić (predsjednik povjerenstva)
Committee memberAnita Begić Hadžipašić (član povjerenstva)
Committee memberStjepan Kožuh (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Metallurgy
Sisak
Defense date and country2021-09-27, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Abstract
U ovom radu provedeno je ispitivanje otpornosti alatnog čelika X19NiCrMo4 prema lokalnoj koroziji elektrokemijskim i metalografskim metodama. Provedena je ciklička anodna polarizacija navedenog čelika u različitim medijima u svrhu definiranja parametara lokalne korozije. Ispitivanje se provodilo u četiri medija: 3,5 % NaCl, umjetna kiša, otopina emulzije Lenox Band-Ade i vode te voda. Elektrokemijska ispitivanja pokazala su kako je alatni čelik oznake X19NiCrMo4 najotporniji prema lokalnoj koroziji u mediju emulzije Lenox Band-Ade, dok je najpodložniji lokalnoj koroziji u mediju 3,5 % NaCl. Naime, jedino u kloridnom mediju je došlo do pojave pitting korozije pri čemu je registriran piting potencijal, dok u ostalim medijima u referentnom intervalu elektrodnog potencijala nije zabilježena pojava piting lokalne korozije. Rezultate elektrokemijskih ispitivanja potvrdila su metalografska ispitivanja gdje se uočava kako je cijela površina čelika nakon ispitivanja u mediju 3,5 % NaCl prekrivena korozijskim produktima, dok je nakon ispitivanja u mediju emulzije Lenox Band-Ade površina čelika ista kao i prije ispitivanja.
Abstract (english)
In this paper, the resistance of tool steel X19NiCrMo4 to local corrosion by electrochemical and metallographic methods was tested. Cyclic anodic polarization of said steel in different media was performed in order to define local corrosion parameters. The test was performed in four media: 3.5% NaCl, artificial rain, water solution of Lenox Band-Ade emulsion and water. Electrochemical tests have shown that X19NiCrMo4 tool steel is the most resistant to local corrosion in water solution of Lenox Band-Ade emulsion medium, while it is most susceptible to local corrosion in 3.5% NaCl medium. Namely, pitting corrosion occurred only in the chloride medium and pitting potential was registered, while in other media, the occurrence of pitting local corrosion was not recorded in the reference interval of the electrode potential. The results of electrochemical tests were confirmed by metallographic tests where it is observed that the entire steel surface after testing in 3.5% NaCl medium is covered with corrosion products, while after testing in water solution of Lenox Band-Ade emulsion medium the steel surface is the same as before testing.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:115:824096
Study programmeTitle: Graduate study program Metallurgy
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-10-06 10:13:06