Naslov
Corrosion and microstructural analysis of CuAlNi shape memory alloy in 0.9 % NaCl solution before and after heat treatment

Autori
Ivanić, Ivana ; Kožuh, Stjepan ; Vrsalović, Ladislav ; Gudić, Senka ; Kosec, Borut ; Anžel, Ivan ; Gojić, Mirko

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

Izvornik
Proceedings of XVIII YuCorr Internacional Conference / Pavlović, Miomir ; Dekanski, Aleksandar ; Pavlović, Miroslav - Beograd : Serbian Society of Corrosion and Materials Protection, 2016, 226-233

ISBN
978-86-82343-24-0

Skup
XVIII YuCorr Internacional Conference

Mjesto i datum
Tara, Srbija, 12.04.2016. - 15.04.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
corrosion ; CuAlNi SMA ; polarization ; microstructure

Sažetak
The electrochemical behavior in 0.9 % NaCl solution (pH = 7.4) at 37°C of a CuAlNi shape memory alloy (SMA) before and after heat treatment at two different temperatures were studied by means of open circuit potential (EOC) measurements, linear and potentiodynamic polarizations and also OM and SEM-EDX microanalysis. The investigations were performed on samples in as-cast state and two different heat treated states (at temperatures of 850 °C/60’/WQ (K1) and 920 °C/60’/WQ (K2)). Higher polarization resistance and lower corrosion current density of heat treated CuAlNi alloy (K1 and K2) compared to CuAlNi alloy in as-cast state indicate beneficial influence of heat treatment on corrosion resistance of CuAlNi alloy. Scanning electron microscopy investigations revealed deposits of corrosion products on the surface in the form of spikes. The EDS analysis have showed that the surface contains the significant amount of oxygen and chloride compounds. Optical micoscropy shows that after removing the surface layers of corrosion products, damages due to pitting corrosion were clearly visible on electrode surface.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija

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