Hi, Antonio,
I am assuming these components will be required to survive in a space
atmosphere, but may be stored after being soldered in a humid
environment, and could be subjected to extreme g-forces. Therefore I am
recommending you refer to MIL-STD-810F, specifically Method 501.4,
502.4, 507.4, or instead, combined testing as outlined in Method 520.2.
There may be other methods, but you need to determine what they are
based on the service environment the device will see. MIL-STD-810
provides information on how to determine the tests that are necessary.
I would do this after brush cleaning the parts in alcohol, tinning them
in fresh solder with a good water-soluble flux, cleaning them and
permorming a ROSE test, assembling them using normal, qualified assembly
processes to scrap modules, and then subjecting the modules to the test
methods followed by normal electrical test and visual inspection to
verify they are fully functional and do not display further oxidation or
discoloration, and meet the criteria outlined within J-STD-001D.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Thursday, July 06, 2006 10:57 AM
To: [log in to unmask]
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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