Original scientific paper

https://doi.org/10.15255/KUI.2020.022

Intergranular Corrosion of Cu-Al-Ni Alloy in 0.5 mol dm–3 H₂SO₄ Solution

Ladislav Vrsalović orcid.org/0000-0001-6111-5475 ; University of Split, Faculty of Chemistry and Technology, Department of Electrochemistry and Materials Protection, Ruđera Boškovića 35, 21 000 Split, Croatia
Senka Gudić ; University of Split, Faculty of Chemistry and Technology, Department of Electrochemistry and Materials Protection, Ruđera Boškovića 35, 21 000 Split, Croatia
Lana Terzić orcid.org/0000-0002-8700-536X ; University of Split, Faculty of Chemistry and Technology, Department of Electrochemistry and Materials Protection, Ruđera Boškovića 35, 21 000 Split, Croatia
Ivana Ivanić orcid.org/0000-0002-6375-1448 ; University of Zagreb, Faculty of Metallurgy, Department of Physical Metallurgy, Aleja narodnih heroja 3, 44 000 Sisak, Croatia
Stjepan Kožuh ; University of Zagreb, Faculty of Metallurgy, Department of Physical Metallurgy, Aleja narodnih heroja 3, 44 000 Sisak, Croatia
Mirko Gojić ; University of Zagreb, Faculty of Metallurgy, Department of Physical Metallurgy, Aleja narodnih heroja 3, 44 000 Sisak, Croatia
Emeka Emmanuel Oguzie orcid.org/0000-0003-2708-9298 ; Federal University of Technology Owerri, Africa Centre of Excellence in Future Energies and Electrochemical Systems (ACE-FUELS), PMB 1526, Owerri, Nigeria

Abstract

The corrosion behaviour of Cu-Al-Ni alloy in 0.5 mol dm–3 H₂SO₄ solution was investigated by electrochemical methods including open circuit potential measurement, electrochemical impedance spectroscopy measurements, linear and potentiodynamic polarization. Measurements were performed in 0.5 mol dm–3 H₂SO₄ at temperatures 20 and 40 °C. After polarization testing, corroded electrode surfaces were ultrasonically cleaned in deionized water and examined by light and scanning electron microscopy, while the elemental composition at individual points of the alloy surface was determined by EDS analysis. The results of the investigations revealed the occurrence of intergranular corrosion on the Cu-Al-Ni surface, which became more pronounced with increasing temperature.




This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

shape memory alloy; Cu-Al-Ni alloy; corrosion; polarization; SEM/EDS

Hrčak ID:

243901

URI

https://hrcak.srce.hr/243901

Publication date:

24.9.2020.

Article data in other languages: croatian

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