EFFECT OF ALUMINIUM ADDITION ON MECHANICAL AND CORROSION CHARACTERISTICS OF STERLING SILVER AgCuZnSi ALLOY

Marija Korać; Stevan Dimitrijević; Kemal Delijić; Silvana Dimitrijević; Željko Kamberović

doi:10.30544/MMESEE71

Authors

Marija Korać Faculty of Technology and Metallurgy, University of Belgrade Author https://orcid.org/0000-0003-0396-0974
Stevan Dimitrijević Innovation Center Faculty of Technology and Metallurgy in Belgrade Ltd, University of Belgrade Author https://orcid.org/0000-0002-6507-0259
Kemal Delijić Faculty of Metallurgy and Technology, University of Montenegro, Podgorica Author
Silvana Dimitrijević Mining and Metallurgy Institute Bor, Serbia Author https://orcid.org/0000-0003-1670-4275
Željko Kamberović Faculty of Technology and Metallurgy, University of Belgrade Author https://orcid.org/0000-0003-0507-5346

DOI:

https://doi.org/10.30544/MMESEE71

Keywords:

atmospheric corrosion, silver, alloys, anti-tarnish, alloy

Abstract

This study investigates the effects of aluminum addition on the mechanical and corrosion properties of a sterling silver alloy in the Ag-Cu-Zn-Si system. Corrosion behavior was evaluated using potentiodynamic polarization tests, open-circuit potential measurements, and the linear polarization resistance method. The alloys were tested in four different solutions: artificial sweat, 0.9% NaCl, and 0.1M and 0.01M Na₂S solutions. Mechanical properties were assessed through Brinell hardness testing. The results indicate that aluminum improves the corrosion resistance of the alloy, but only up to a certain concentration. A small aluminum addition enhances corrosion resistance compared to the reference alloy, while a further increase reduces it. The best performance was observed for the AgCu1.9Zn3.7Al1.6Si0.3 alloy.

EFFECT OF ALUMINIUM ADDITION ON MECHANICAL AND CORROSION CHARACTERISTICS OF STERLING SILVER AgCuZnSi ALLOY

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