Influence of medium on corrosion and microstructural properties of K110 tool steel for cold work

Znanstveni rad - Izvorni znanstveni rad

• Autor: Sandra Brajčinović
• Autor: Anita Begić Hadžipašić
• Autor: Ljerka Slokar Benić
• 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 behaviour of K110 tool steel for cold work in industrial emulsion medium (Lenox Band- Ade semi-synthetic oil + water, in a ratio of 1:10), water and 3.5% NaCl medium. Using the method of electrochemical impedance spectroscopy (EIS) and Tafel extrapolation, electrochemical measurements were performed in order to determine the corrosion parameters. After polarization measurements, the surface of the sample was examined with an optical microscope. Tafel extrapolation of the polarization curves revealed that the tested tool steel showed the lowest corrosion rate in the Lenox Band-Ade emulsion medium and the highest in the medium of 3.5% NaCl. The obtained results were confirmed by the method of electrochemical impedance spectroscopy, where the lowest charge transfer resistance was registered in the 3.5% NaCl medium, which indicates the fact that the thinnest oxide layer was formed in tested medium, which has a very weak protective role in the corrosion process. Metallographic analysis of the sample surface after polarization measurements in 3.5% NaCl medium indicates the occurrence of pitting corrosion caused by the action of aggressive chloride ions from the solution, which caused the destruction an already weak passive layer on the metal surface. At the same time, chloride ions from the acid medium attack more aggressively the matrix of the metal base of the tool steel, in contrast to the precipitated carbides on the sample surface.

• Ključne riječi (engleski): tool steel for cold work; corrosion rate; impedance; microstructure
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov zbornika: METAL Conference Proeedings
• Brojčani podaci: str. 816-821
• ISBN: 978-80-87294-97-0
• p-ISSN: 2694-9296
• DOI: https://doi.org/10.37904/metal.2020.3558
• URN:NBN: urn:nbn:hr:115:071264
• Datum objave publikacije: 2020
• 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: 29th International Conference on Metallurgy and Materials; Kratica: METAL 2020; Lokacija: Brno, Češka; Datum početka: 2020-05-20; Datum završetka: 2020-05-22; Vrsta izlaganja: Predavanje
• URL dokumenta: https://www.confer.cz/metal/2020/3558-influence-of-medium-on-corrosion-and-microstructural-properties-of-k110-tool-steel-for-cold-work
• Vrsta resursa: Tekst
• Izdavač: TANGER Ltd.
• Mjesto izdavanja: Brno, Czech Republic, EU
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-04-29 09:55:33