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March 2003

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Subject:
From:
Brian Ellis <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 12 Mar 2003 15:15:48 +0200
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Bev

German silver is an alloy of copper, zinc and nickel. It is the nickel
that gives it its lustre and, as you know, when you heat nickel and
their alloys, the oxide is brownish. It therefore does not surprise me
it turns yellowish after a reflow. When I was a kid in the 1930s, the
rails in my 00 electric trains set were in German silver and invariably
had a yellowish cast to them.

Incidentally, in some countries, it is illegal to use the term German
silver because of consumer protection laws that consider the term may be
interpreted as argentum made in Germany!

Brian

Bev Christian wrote:
> TechNetters,
> Have a met. question for you.  Is there a slightly different composition of the above-named material that would make it go yellow after seeing one normal reflow?  No, the color is NOT flux residue.
>
> regards,
> Bev Christian
> Research in Motion
>
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