Naslov
Electrochemical corrosion resistance of nanostructured hardmetals in acid media

Autori
Aleksandrov Fabijanić, Tamara ; Sakoman, Matija ; Kurtela, Marin ; Marciuš, Marijan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceeding of Euro PM2018 Congress & Exhibition / - Shrewsbury : EPMA, 2018

Skup
Euro PM2018 Congress & Exhibition

Mjesto i datum
Bilbao, Španjolska, 14.10.2018. - 18.10.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
nanostructured hardmetals, C content, Co content, surface roughness, electrochemical corrosion resistance, H2SO4+CO2

Sažetak
The electrochemical corrosion resistance of nanostructured hardmetals in acid media was investigated. The samples of nanostructured hardmetals were mixed with 5 wt. %Co and 15 wt. %Co and consolidated by sinter-HIP process. Different carbon contents were added in order to investigate the influence of C and Co content on the electrochemical corrosion resistance. The samples were researched in the solution of H2SO4+CO2 by direct current techniques at room temperature. Corrosion potential (Ecorr), corrosion current density (icorr), polarization resistance (Rp) were determined. On the basis of conducted research it was found that C content added to the starting mixture influence the electrochemical corrosion resistance. Comparing WC-5Co samples better electrochemical corrosion resistance was observed for samples with lower content of C added and lower magnetic saturation while for WC-15Co the opposite behaviour was obtained. Co content showed low influence on the electrochemical corrosion resistance in both acid and neutral solution. In general, there is no clear trend of increasing corrosion current densities icorr and decreasing polarisation resistance Rp with increasing Co content.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija, Strojarstvo

POVEZANOST RADA