The use of pulsed current is well known as a research tool to study the electrodeposition mechanism of metals, however, it was realized that this method could provide a means to improve the properties of deposits. Electrodeposition of gold or its alloys is not only used in the electronics industry due to its conductive and anti-corrosive properties, but also as a final layer due to its aesthetic properties. In this study we focused on a cyanide gold-nickel bath, among the most frequently used in the electroplating industry intended for the decorative sector. The use of modulated currents has proven to be an effective methodology to be able to control and improve the chemical and physical characteristics of metal deposits. Deposits obtained through pulsed currents have a smaller grain size and a more homogeneous surface, both at the level of thickness dispersion on the surface and at the roughness of the samples themselves. A direct consequence of the above results is the improvement of the aesthetic finish of the workpieces with an increase in brightness as well as anti-corrosive properties.

Pulse Electroplating of Gold-Nickel Alloys: Morphological and Aesthetic Improvement Compared to DC / Elena Mariani; Walter Giurlani; Margherita Verrucchi; Vincenzo dell’Aquila; Pierandrea Lo Nostro; Massimo Innocenti. - In: JOURNAL OF THE ELECTROCHEMICAL SOCIETY. - ISSN 0013-4651. - ELETTRONICO. - 171:(2024), pp. 0-0. [10.1149/1945-7111/ad1d97]

Pulse Electroplating of Gold-Nickel Alloys: Morphological and Aesthetic Improvement Compared to DC

Elena Mariani
;
Walter Giurlani;Margherita Verrucchi;Pierandrea Lo Nostro;Massimo Innocenti
2024

Abstract

The use of pulsed current is well known as a research tool to study the electrodeposition mechanism of metals, however, it was realized that this method could provide a means to improve the properties of deposits. Electrodeposition of gold or its alloys is not only used in the electronics industry due to its conductive and anti-corrosive properties, but also as a final layer due to its aesthetic properties. In this study we focused on a cyanide gold-nickel bath, among the most frequently used in the electroplating industry intended for the decorative sector. The use of modulated currents has proven to be an effective methodology to be able to control and improve the chemical and physical characteristics of metal deposits. Deposits obtained through pulsed currents have a smaller grain size and a more homogeneous surface, both at the level of thickness dispersion on the surface and at the roughness of the samples themselves. A direct consequence of the above results is the improvement of the aesthetic finish of the workpieces with an increase in brightness as well as anti-corrosive properties.
2024
171
0
0
Elena Mariani; Walter Giurlani; Margherita Verrucchi; Vincenzo dell’Aquila; Pierandrea Lo Nostro; Massimo Innocenti
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1348893
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