Naslov
Microstructural Analysis of Ti-Ni Shape Memory Alloy after Corrosion Testing in 0.9 % NaCl Solution

Autori
Gojić, Mirko ; Vrsalović, Ladislav ; Kožuh, Stjepan ; Ćubela, Diana ; Gudić, Senka

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

Izvornik
Proceedings of XIV YuCorr International Conference / Pavlović, Miomir ; Panić, Vladimir - Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala, 2012, 289-297

ISBN
978-86-82343-17-2

Skup
Exchanging experiences in the fields of corrosion, materials and environmental protection

Mjesto i datum
Tara, Srbija, 17.04.2012. - 20.04.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
nitinol; shape memory alloy; microstructure; corrosion

Sažetak
In this work the corrosion behaviour of Ti-Ni (nitinol) shape memory alloy was studied using different electrochemical techniques including open circuit potential (EOC), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Samples made from nitinol alloy with diameter of 4 mm were used for microstructural and corrosion investigations. Testing solution was 0.9 % NaCl solution at pH=7.4, and temperature 37 °C. Microstructural analysis was performed by the optical and electron scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS). High values of the oxide film resistance (Rox) and the low value of corrosion current density (icorr) indicated high corrosion resistance of Ni-Ti alloy, but relatively low value of breakdown potential (Eb) indicates the possibility of development localised corrosion attack on the alloy surface. Size of pits was from 10 to 100 m and surface inclusions were initiation sites for the pitting corrosion.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija

POVEZANOST RADA