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December 1997

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Subject:
Re: ASSY:White residue after cleaning
From:
Charles Barker <[log in to unmask]>
Reply To:
TechNet Mail Forum.
Date:
Fri, 19 Dec 1997 09:39:11 -0600
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Charles Barker@I-O INC
12/19/97 09:39 AM

1. Is the RMA flux one of those that is considered "no clean?"
2. Does Axarel 32 contain much alcohol?
3. have seen white residue between surface mount leads on parts soldered
with "no clean" RMA (really just low solids) flux AFTER they were cleaned
in an Aquastorm with Armakleen and then put through the Omegameter.  We
were told that this was the result of a reaction between trace amounts of
flux remaining and the alcohol in the Ohmegameter.

We eventually changed to a WS flux and a different chemistry.





[log in to unmask] on 12/19/97 08:58:00 AM

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cc:    (bcc: Charles Barker/US/I-O INC)
Subject:  [TN] ASSY:White residue after cleaning




Has anyone come across a white residue on the circuit side of board
assemblies after cleaning?  We are using Axarel 32 in a semi-aqueous
cleaner to remove an RMA flux after the wave solder operation.
Thanks for your help!
Larry Davis
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