Anti-tarnish silver alloys in system Ag-Cu-Zn-Si with the addition of aluminum
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Published:2018-10-19
Issue:3
Volume:24
Page:181-188
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ISSN:2217-8961
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Container-title:Metallurgical and Materials Engineering
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language:
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Short-container-title:Metall Mater Eng
Author:
Korać MarijaORCID,
Dimitrijević Stevan,
Delijić Kemal,
Kamberović Željko
Abstract
This paper presents investigations of aluminum addition influence on the corrosion characteristics of the sterling silver Ag-Cu-Zn-Si alloys. The procedure for obtaining Ag-Cu-Zn-Al-Si alloys in small ranges of predefined composition was also presented. Open circuit potential measurements, linear polarization resistance method and potentiodynamic polarization tests were employed to determine corrosion characteristics of the alloys. The materials were tested in a 0.01M sodium sulfide solution. It was shown that the addition of aluminum improves sulfidization resistance and corrosion characteristics. Best results are achieved for the alloy with the following composition 92.5% Ag, 1.9% Cu, 3.7% Zn, 1.6% Al and 0.3% Si.
Publisher
Association of Metallurgical Engineers of Serbia
Subject
Metals and Alloys,Mechanical Engineering