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March 1997

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Subject:
From:
"Leo P. Lambert" <[log in to unmask]>
Date:
Thu, 27 Mar 1997 22:00:35 -0500 (EST)
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Hello Darrell, I'll take a stab at your request. If the finger has solder
splashes on it and does not make contact, there should be no problems. If
the contact is contaminated with solder however and the contact is made,
fretting corrosion is possible and needs to be evaluated. The fretting will
wear through the gold into the base material and create an increase in
resistance which could impact the performance of the product.

So if solder is in the contact area, remove the solder and replate the gold
and you should be all set.  I would not mix the metallurgies in the contact
areas as a general rule.

Hope this helps.

Leo Lambert
Technical Director
EPTAC Corp.

Check out our web page, www.eptac.com

At 10:18 AM 3/27/97 PST, Darrell Daigle wrote:
>
>Hello technetters, I will try this for the fifth time,I apologize if your 
>file is loaded with this request, it has been returned to me as undelivered 
>mail.
>
>If a gold finger with splashes of tin/lead on it "does not" make contact
>within a gold socket, will there be galvanic corrosion.
>Unfortunately IPC-A-600 does not address reliability issues, if there is
>reference material out there, I would like to know.
>
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