Corrosion resistance of cementing steel X19NiCrMo4 in medium of 5 % NaOH and 5 % H2SO4

Znanstveni rad - Izvorni znanstveni rad

• Autor: Sandra Brajčinović
• Autor: Anita Begić Hadžipašić
• Urednik: Natalija Dolić
• Urednik: Zdenka Zovko Brodarac
• Urednik: Sandra Brajčinović
• Autorova ustanova: Sveučilište u Zagrebu; Metalurški fakultet
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Metalurgija

Sažetak (engleski)

This paper presents the results of testing the corrosion behavior of X19NiCrMo4 cementing steel in 5 % NaOH and 5 % H2SO4 solution. Electrochemical measurements were performed by measuring the open circuit potential, determining the corrosion parameters using electrochemical impedance spectroscopy (EIS) and Tafel extrapolation. The corrosion rate, which was determined by Tafel extrapolation method, was lower in 5 % NaOH solution than that in 5 % H2SO4 solution. The obtained results were confirmed by the method of electrochemical impedance spectroscopy, which showed a higher value of charge transfer resistance of the tested steel in an alkaline medium, which proves higher corrosion resistance. Metallographic analysis were performed on a sample previously etched in nital and on a sample after polarization measurements. Images of the electrode surface after polarization measurements in 5 % H2SO4 medium showed a completely corroded steel surface indicating dissolution of the oxide layer due to acid exposure. No changes were observed on the sample surface in the alkaline medium.

• Ključne riječi (engleski): cementing steel; corrosion rate; impedance; charge transfer resistance; microstructure
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Završna verzija rukopisa prihvaćena za objavljivanje (postprint)
• Naslov zbornika: Proceedings Book of 19th International Foundrymen Conference Humans - Valuable Resource for Foundry Industry Development
• Brojčani podaci: str. 249-259
• ISBN: 978-953-7082-39-0
• URN:NBN: urn:nbn:hr:115:467302
• Datum objave publikacije: 2021
• Projekt: Šifra: KK.01.1.1.02.0020; Naziv (hrvatski): Centar za ljevarstvo - SIMET; Naziv (engleski): Center for casting - SIMET; Kratica: SIMET; Voditelj: Zdenka Zovko Brodarac; Pravna nadležnost: Hrvatska; Financijer: Europska komisija; Linija financiranja: European Regional Development Fund
• Skup: Naziv: 19th International Foundrymen Conference Humans – Valuable Resource for Foundry Industry Development; Lokacija: Split, Hrvatska; Organizator: Sveučilište u Zagrebu Metalurški fakultet; Datum početka: 2021-06-16; Datum završetka: 2021-06-18; Vrsta izlaganja: Predavanje
• URL dokumenta: https://ifc.simet.hr/?page_id=2518
• Vrsta resursa: Tekst
• Izdavač: Sveučilište u Zagrebu Metalurški fakultet
• Mjesto izdavanja: Split
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-04-29 12:08:34