It also occurs to me that besides excessive heat for too long of
time, it could also be done by acid fumes that are blowing across the
parts.
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Russeau
Sent: Thursday, July 06, 2006 2:10 PM
To: [log in to unmask]
Subject: Re: [TN] Corrosion on Gold plating
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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