Regarding cleaning of RMA flux:

     We use Axeral 2200 for hand cleaning (followed by IPA rinse) and EC7 and
EC7R for batch-type semi-aqueous cleaning in an ECD 6307 "dishwasher" (use
specific gravity as an indication of flux loading) with IPA/water rise (use
conductivity as an indication of ionic cleanliness).  We also use an
Omegameter for final product cleanliness verification.  All with very good
results.

Pat Hogue
Materials and Processes Engineering
Honeywell Satellite Systems Operation
Glendale, AZ

 ----------
From:  Steven H Axdal[SMTP:[log in to unmask]]
Reply To:  TechNet E-Mail Forum.;Steven H Axdal
Sent:  Monday, June 01, 1998 7:02 AM
To:  [log in to unmask]
Subject:  [TN] How to Clean RMA Flux?

  I'm looking for pointers to information on how to clean RMA flux from
  circuit boards.  We're doing contract assembly and the design currently
  specifies RMA flux.  (Build specs are basically WS-6536 and Mil-Std-2000,
  NOT 2000A or J-Std) We've got an in-line aqueous system (using Armakleen
  detergents) in place, but it's removing markings from diodes (and the
  markings are required to be readable).  We've also been using a solvent
  vapor system (AK-225), but it's attacking the adhesive bonding heatsinks
  to the boards.

  Anybody care to make suggestions for RMA flux cleaning approaches or
  pointers to likely candidates for a)information or b)product
  representatives?

  Thanks
  Steven Axdal
  General Dynamics Information Systems
  [log in to unmask]             612-853-3830

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