Marshall,
You ask enough questions to keep me typing for a week.  I would suggest
that you look in the Technet archives, because this topic has been
discussed on numerous occasions in the past.  You will find long
explanations from myself and Brian Ellis that will answer some of your
questions.  Second, find a copy of J-HDBK-001 and read section 4 (fluxes)
and section 8 (cleaning).  Brilliantly written stuff.  The handbook is a
companion to J-STD-001 and has much information on assembly and materials
choices.  Third, I suggest you get a copy of IPC-TP-1115, which covers
important considerations if you chose to go no-clean.  After reading
through those documents, I'd be glad to help.

On your question regarding cleaning with a toothbrush and soapy water:
what was the brand of scotch he was drinking and was he on his 8th or 9th
round?

The short answer is that there are no easy answers to your questions and no
one can do your homework for you.  Good luck.

Doug Pauls
Rockwell Collins




Marshall Hopkins <[log in to unmask]>@ipc.org> on 08/01/2002 10:14:28 AM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
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Subject:    [TN] Solder/Flux Cleaning Methods


I am interested in the most appropriate cleaning method for PCBs after
soldering. I do not have a bath, but am able to brush or spray alcohol or
flux-off over the board. I can never get it as clean as when it is initally
stuffed and cleaned before returning to me. In military applications,
especially those that operate in saltwater enviornments, it is very
important that I can clean the board just in case I have to touch up a
solder joint or replace a part. Is there a particular solder that makes the
job easier such as organic core, rosin core, no-clean, etc...? Also, is
there a particular type of cleaner that works best with the different
solder types? I was told that a toothbrush and soapy water could remove
some flux. Seems like that would be a nice method with readily available
products. Finally, maybe it is the flux and not the solder that really
matters. Are there different types of fluxes that are easier to clean than
others? Any help is greatly appreciated.

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