hi,

it's been our experience that our westek in-line cleaner, with a saponifier pre-wash, will attack the acrylic coating.  i suspect it will attack the coating without the saponifier also.

phil

-----Original Message-----
From: bbarr [mailto:[log in to unmask]]
Sent: Thursday, December 21, 2000 9:22 AM
To: [log in to unmask]
Subject: [TN] Conformal Coating and Aqueous Cleaning


I have some boards that are coated with acrylic conformal coating. We have
to do a few chip replacements. The coating will be selectively stripped
around the chips and the rework performed. Is there a problem with sending a
coated board through an in-line aqueous cleaner? I am running just water at
130 degrees F. Will the pressure damage the coating? Will the water
recycling system become contaminated? Do I have to strip the board
completely prior to rework to avoid any problems?

Thanks for your help.


Bob


Robert Barr
Manufacturing Engineering
Formation, Inc.
Voice: 856-234-5020 x3035
Fax: 856-234-6679
email: [log in to unmask]

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