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October 2008

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Subject:
From:
Phil Nutting <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Phil Nutting <[log in to unmask]>
Date:
Wed, 29 Oct 2008 11:34:39 -0400
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Pete,

Seems to me there was recent thread here on something similar.  We have soldered to stainless steel and I think the process is similar for aluminum.  It has to do with the flux used.  Word of caution... I believe it is an acid based flux so how it is applied and washed off may be of concern.

From McMaster-Carr website:

Aluminum Soldering Flux

Use this paste flux with aluminum solder and any tin/lead solder to solder aluminum and aluminum alloys. Also for use with copper, chrome, and brass. Meets DOD 1866 and is ROHS compliant.
4-oz. Jar 7696A2   Each   $9.65
1-lb. Jar 7696A1   Each   $30.41

 I have not tried it.

Phil Nutting


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pete Houwen
Sent: Wednesday, October 29, 2008 10:01 AM
To: [log in to unmask]
Subject: [TN] Soldering to Aluminum?

Has anyone tried soldering lead free to an Aluminum circuit on polyester?

We are looking at a very simple one component circuit that needs to be on a
material with some flexibility.  We do run millions of feet of aluminum on
polyester passive circuits in one of our plants.  I am being asked to see if we
can take advantage of the in house production to save some cost.

My other thought is to just try a conductive adhesive, but we might need to
do some tooling for that, as this would require about 3 million of these
circuits/year.

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