prikaz prve stranice dokumenta Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva
  Download
PDF 1.75 MB
Scientific paper - Original scientific paper
Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva
In: Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering. / Dolić, Natalija; Zovko Brodarac, Zdenka; Begić Hadžipašić, Anita (Ed.). Sisak: Sveučilište u Zagrebu Metalurški fakultet, 2018. pp. 98-112. urn:nbn:hr:115:877019
Begić Hadžipašić, Anita; Brajčinović, Sandra; Gojsević Marić, Gordana; Zovko Brodarac, Zdenka

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

Cite this document

Begić Hadžipašić, A., Brajčinović, S., Gojsević Marić, G. & Zovko Brodarac, Z. (2018). Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva. In N. Dolić, (Ed.), Z. Zovko Brodarac, (Ed.), A. Begić Hadžipašić, (Ed.), Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering (pp. 98-112). Sisak: Sveučilište u Zagrebu Metalurški fakultet. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:877019

Begić Hadžipašić, Anita, et al. "Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva." Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering, edited by Natalija Dolić, edited by Zdenka Zovko Brodarac, edited by Anita Begić Hadžipašić, Sveučilište u Zagrebu Metalurški fakultet, 2018, pp. 98-112. https://urn.nsk.hr/urn:nbn:hr:115:877019

Begić Hadžipašić, Anita, Sandra Brajčinović, Gordana Gojsević Marić and Zdenka Zovko Brodarac. "Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva." In Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering, 98-112. Sisak: Sveučilište u Zagrebu Metalurški fakultet, 2018. Accessed 2024 November 26. https://urn.nsk.hr/urn:nbn:hr:115:877019

Begić Hadžipašić, A., et al. (2018) 'Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva', in Dolić, N. (ed.), Zovko Brodarac, Z. (ed.), Begić Hadžipašić, A. (ed.), Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering, Sveučilište u Zagrebu Metalurški fakultet, Sisak, pp. 98-112. Available at: https://urn.nsk.hr/urn:nbn:hr:115:877019 (Accessed 26 November 2024)

Begić Hadžipašić A, Brajčinović S, Gojsević Marić G, Zovko Brodarac Z. Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva. In: N. Dolić, ed., Z. Zovko Brodarac, ed., A. Begić Hadžipašić, ed. Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering. Sisak: Sveučilište u Zagrebu Metalurški fakultet; 2018. Pp. 98-112. [cited 2024 November 26] Available at: https://urn.nsk.hr/urn:nbn:hr:115:877019

A. Begić Hadžipašić, S. Brajčinović, G. Gojsević Marić and Z. Zovko Brodarac, "Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva", Proceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering, N. Dolić, Z. Zovko Brodarac and A. Begić Hadžipašić, Eds. Sisak: Sveučilište u Zagrebu Metalurški fakultet, 2018. [Online] Available at: https://urn.nsk.hr/urn:nbn:hr:115:877019 [Accessed: 26 November 2024]

Metadata
Title (croatian)Utjecaj medija i mikrostrukture na korozijsko ponašanje sivog lijeva
Title (english)Influence of medium and microstructure on corrosion behavior of gray cast iron
AuthorAnita Begić Hadžipašić
AuthorSandra Brajčinović
AuthorGordana Gojsević Marić
AuthorZdenka Zovko Brodarac
EditorNatalija Dolić
EditorZdenka Zovko Brodarac
EditorAnita Begić Hadžipašić
Author's institutionUniversity of Zagreb
Faculty of Metallurgy
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Abstract (croatian)
U ovom radu ispitana je korozijska otpornost sivog lijeva u mediju umjetne kiše i mediju 0,5 M H2SO4 te utjecaj mikostrukture na njegovo korozijsko ponašanje u navedenim medijima. Tafelovom ekstrapolacijom polarizacijskih krivulja je ustanovljeno da ispitani sivi lijev pokazuje izrazito veliku brzinu korozije u kiselom mediju za razliku od ispitivanja u mediju umjetne kiše, gdje brzina korozije poprima znatno manju vrijednost. Međutim, u usporedbi s rezultatima ranijih istraživanja dobivenim za nodularni lijev te su vrijednosti trostruko vede, što upuduje na činjenicu da je nodularni lijev ipak korozijski otporniji u uvjetima atmosferske korozije te stoga i prihvatljiviji za izradu dijelova za poljoprivredne strojeve. Dobiveni rezultati su potvrđeni i metodom elektrokemijske impedancijske spektroskopije, pri čemu je u mediju umjetne kiše za sivi lijev registriran manji otpor prijenosu naboja od nodularnog lijeva. To ukazuje na činjenicu da se na sivom lijevu formirao tanji sloj, koji predstavlja slabu barijeru prema prodiranju agresivnih iona iz otopine. Dobiveno korozijsko ponašanje sivog lijeva u ispitanim medijima može se povezati i s njegovom mikrostrukturom. Naime agresivni ioni iz primijenjenih medija napadaju metalnu osnovu ispitanih materijala, dok grafit zadržava svoj prvobitni oblik. Pri usporedbi s nodularnim lijevom, nodule su se pokazale kao povoljniji oblik izlučenog grafita jer bolje prekrivaju površinu uzorka i slijedom navedenog izoliraju uzorak u procesu elektrokemijske korozije.
Abstract (english)
This paper investigated the corrosion resistance of gray cast iron in the medium of artificial rain and 0.5 M H2SO4 medium and the effect of microstructure on its corrosion behavior in the mentioned media. By Tafel's extrapolation of the polarization curves, it was found that the examined gray cast iron shows an extremely high corrosion rate in the acidic medium, as opposed to the artificial rain test, where the corrosion rate is much lower. However, compared with the results of earlier researches obtained for nodular cast iron these values are three times higher, indicating that the nodular cast iron is more corrosion-resistant to atmospheric corrosion and therefore more acceptable for the manufacture of parts for agricultural machines. The obtained results were confirmed by the method of electrochemical impedance spectroscopy, where in the medium of artificial rain lower value of charge transfer resistance of gray cast iron was registered in opposite to nodular cast iron. These points to the fact that a thin layer formed on the gray cast iron, which represents a weak barrier to penetrating aggressive ions from the solution. The corrosion behavior of the gray cast iron in the tested media can also be related to its microstructure. Namely, aggressive ions from the applied media attack the metal matrix of the examined materials, while the graphite retains its original form. When compared to nodular cast iron, the nodules seems to be a more favorable form of precipitated graphite due to better sample surface covering and therefore the insulation in electrochemical corrosion process.
Keywords (croatian)
Keywords (english)
Languagecroatian
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Publication titleProceedings Book 17th International Foundrymen Conference Hi-tech casting solution and knowledge based engineering
Numberingpp. 98-112
ISBN978-953-7082-31-4
URN:NBNurn:nbn:hr:115:877019
Publication2018
ConferenceTitle: 17th International Foundrymen Conference
Location: Opatija, Croatia
Start date: 2018-05-16
End date: 2018-05-18
Assembly type: Lecture
Type of resourceText
PublisherSveučilište u Zagrebu Metalurški fakultet
Publishing placeSisak
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-04-24 06:01:48