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Is co-deposition of silver-Germanium alloy possible for silverware?



(-----) 2007

Q. Has anyone successfully done any research on the co-deposition of silver-germanium alloy and have any commercial applications been successful ?
This maybe the best solution for a long term anti-tarnish property since most of the proprietary anti-tarnish dips have a very limited life; chromate base dips lead to yellowing over time and also lead to effluent treatment issues besides being toxic (at least pschycologically ); Tarniban is chromate based; electrophoretic or other alloys are expensive besides leading to yellowing over time and cannot be applied to food based products; etc. So, if a Silver-germanium alloy can be deposited, it MAY be the best solution.

Hopefully somebody will enlighten me on this alloy coating.

deepak whorra
Deepak Whorra
silver craftwork - New Delhi, India
^


simultaneous 2007

In USA and Europe you can buy proprietary silver-copper-germanium alloy (Argentium(R) sterling silver) and according to producer it is very resistant to tarnish. You can buy some of alloy and dissolve it in cyanide solution,then you can try to electroplate with obtained solution, but probably things are much, much more complicate. Hope it helps and good luck!

Goran Budija
- Zagreb, Croatia
^


2007

Deepak,
Yes this has been done, but to my knowledge it is not a common plated alloy. In 1993 the American Electroplaters Society published an article regarding additions of GeO2 to AgCn solutions with good tarnish resistance and increased hardness. If you do a search on silver - germanium alloys you will find the article.

Mark Baker
Process Engineer - Syracuse, New York
^


2007

Q. Hi, Thanks for your replies... I do have some of that alloy but how do I plate it - is Germanium not a semi-conductor ? How do I dissolve that in the cyanide bath? In any case I will experiment and then inform you guys of the results.

In 1993 it was Marc De Bonte who conducted that experiment. I wanted to know if anything further has been done subsequently because the alloy itself is very tarnish resistant...can it be deposited ?

Thanks for your responses but would look forward to answers to these questions.

deepak whorra
Deepak Whorra
silver craftwork - New Delhi, India
^

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