Naslov
Corrosion investigation of rapidly solidified Cu- Al-Ni alloy in NaCl solution

Autori
Vrsalović, Ladislav ; Garvanović, Ines ; Kožuh, Stjepan ; Kosec, Borut ; Bizjak, Milan ; Ivanić, Ivana ; Gudić, Senka ; Gojić, Mirko

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

Izvornik
Proceedings of XX YuCorr International Conference / Pavlović, Miomir ; Pavlović, Miroslav - Beograd : Serbian Society of Corrosion and Materials Protection, 2018, 229-237

ISBN
978-86-82343-26-4

Skup
XX. Međunarodna konferencija stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine = XX. International Conference Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection (YUCORR)

Mjesto i datum
Tara, Srbija, 21.05.2018. - 24.05.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Cu-Al-Ni alloy, melt spinning method, corrosion, electrochemical methods

Sažetak
The corrosion behavior of the Cu-Al-Ni alloy ribbons obtained by rapid solidification was investigated in 0.9% NaCl solution (pH 7.4) at temperatures of 24, 37 and 50 ºC. Measurements have been performed by electrochemical methods such as monitoring the open circuit potential, linear and potentiodynamic polarization methods. The influence of chloride ions concentration on corrosion of Cu-Al-Ni ribbons has also been investigated in 0.1% and 1.5% NaCl solution. Results of the investigations have shown that an increase in chloride concentration and electrolyte temperature leads to increase the corrosion current density and decrease the polarization resistance values which mean higher corrosion attack on Cu-Al-Ni alloy. Microscopic images have shown significant pitting corrosion damages on the Cu-Al-Ni alloy surface. Increasing the electrolyte temperature increases the surface damages of the electrode due to more intense corrosion. SEM surface images of Cu-Al- Ni electrodes have confirmed that with the elevation of chloride concentration a more intense corrosion attack occurs. EDS surface analysis indicated dominant percentage of copper, chlorine and oxygen on the surface, indicating the formation of copper oxide and chloride as the major corrosion products on the surface. The presence of a small percentage of aluminum indicates its distribution in the form of aluminum oxide and chloride in the surface layer.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija

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