Hi Antonio,

Did the components fail in any other way other than the discoloration?  From
the picture it appears as though some of the leads saw excessive heat (i.e.
they look like they have partially burnt to me).  What were the
environmental conditions prior to this inspection?  Was any biasing applied
to the components? How many of these components exhibited this problem?
Have you switched vendors or processes with respect to these components?

Best Regards,

Joe Russeau
Process Analyst

Precision Analytical Laboratory, Inc.
4106 Cartwright Dr. Ste. A
Kokomo, IN 46902

P: 765-455-1993
F: 765-455-1996
E: [log in to unmask]

----- Original Message -----
From: "Steve Gregory" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, July 06, 2006 11:57 AM
Subject: Re: [TN] Corrosion on Gold plating


> Hi Antonio!
>
> Got your picture. It's posted at:
> http://stevezeva.homestead.com/files/leadsview.JPG
>
> Have the leads on the part had the gold removed by pre-tinning? The
> reason I ask is that the finish doesn't look like gold to me, but that
> could just be the image. If they have been tinned, I might suspect that
> they weren't cleaned well and the flux residues started attacking the
> finish...
>
> Kind regards,
>
> -Steve Gregory-
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of antonio
> Sent: Thursday, July 06, 2006 8:46 AM
> To: [log in to unmask]
> Subject: [TN] Corrosion on Gold plating
>
> Please I have a lot of components with corrosion on terminals  gold
> plating. Please see picture. Could anyone suggest an acelerating test to
> evaluate que problem?
>
> thanks a lot
>
> Antonio Souza
> Brazil
>
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