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August 2002

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Subject:
From:
Charles Caswell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 30 Aug 2002 15:52:46 -0500
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I haven't soldered zinc to a board but we have used cast zinc lugs that get wire soldered to them. We tin them first and I love the thin film it leaves on top of the solder pot.
Charles Caswell

-----Original Message-----
From: David Douthit [mailto:[log in to unmask]]
Sent: Friday, August 30, 2002 2:09 PM
To: [log in to unmask]
Subject: Re: [TN] Zinc casting and solderability


Phil,

Zinc will grow "whiskers" just like tin!

David A. Douthit
Manager
LoCan LLC

Phil Bavaro wrote:

> Here is a question that I do not recall having come across ever before.
>
> A mechanical designer has posed the question of substituting zinc in place
> of a copper as a raw material.  This part will be required to be soldered
> down to the circuit card it interfaces with as this is an RF assembly.
>
> Since Zinc alloys are very good for casting definition, is it also possible
> to use Zinc as the base metal.
>
> Or does it require sealing with nickel and then tin plated in order to be
> used for soldering applications?
>
> I realize that some of the new leadfree alloys contain low percentages of
> zinc but this question is oriented towards high contents of zinc in the alloy.
>
> I will keep researching this topic but my first thoughts were that the
> experts on this panel should be able to point me in the right direction at
> least.
>
> Phillip A. Bavaro
> QUALCO/\/\/\/\  Incorporated
> CCA Technical Support
> Engineer, Senior
> [log in to unmask]
> Pager (858) 271-3640
> Tel  (858) 658-2542 Voice mail
> Cell (858) 682-6434 (offsite, after hours)
> Fax (858) 658-1584
>
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