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Subject:	Re: Cleaning of assemblies after hand soldering
From:	"Crepeau, Phil" <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Thu, 7 Jun 2001 07:21:21 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (49 lines)

hi,

we clean assemblies in an in-line aqueous cleaner also using a saponifier.  these assemblies have a large no. of very small sockets on them and are soldered using an aqueous flux.  intuitively, i thought it would be a problem.  in fact, it hasn't been over the past five years or so.

phil

-----Original Message-----
From: Lou Hart [mailto:[log in to unmask]]
Sent: Wednesday, June 06, 2001 2:09 PM
To: [log in to unmask]
Subject: [TN] Cleaning of assemblies after hand soldering

TechNetters,

Is it possible to clean assemblies containing socketed components in an
aqueous cleaner?  We have an in-line cleaner with 2% saponifier for
cleaning after surface mount reflow (water-soluble paste) and after wave
solder (water-soluble flux).

My concern is with assemblies that have had components reworked with
water-soluble flux after socketed parts have been installed.  The cleaning
procedure in IPC-7721, 2.2, recommends use of an automated cleaner, and
provides instructions on hand-cleaning.

Many thanks for any comments.

Lou Hart

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