A saponified wash is a particular sort of semi aqueous cleaning process.
"Saponify" means to turn into soap. So what happens when you use a
saponifier is that the resins in your flux residue are chemically turned
into soap, which is water soluble and can be rinsed off, also any greases,
oils that might be around. Which may or may no be desirable. This is as
opposed to simply being dissolved, or emulsified or whatever.
Saponifiers are also alkaline so will handily neutralise any acid residues.
Saponifiers need to be rinsed off thoroughly as being chemically active they
can cause corrosion just the same as fluxes, actually worse.
Not all no clean fluxes will saponify, and some not completely, so you will
need to check with your flux/paste suppliers.
You might need to check to see if there are any issues arising out of
machine discharges to the drain as well, your saponifier tech support people
can tell you where to start on that.
So far as cleaning no cleans are concerned, most people don't of course, but
it is a known and reasonably common procedure, you are not the first in
other words.
Best regards
Mike Fenner
Applications Engineer, European Operations
Indium Corporation
T: + 44 1908 580 400
M: + 44 7810 526 317
F: + 44 1908 580 411
E: [log in to unmask]
W: www.indium.com
Leadfree: http://Pb-Free.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Marc Cowen
Sent: Monday, December 17, 2001 12:22 PM
To: [log in to unmask]
Subject: [TN] Saponified Wash
Hi All,
I am after some advice regarding saponified wash being used with a no-clean
process.
What is a saponified wash?
With regards to not using a wash with a no-clean process is it also common
practice to use this type of process flow (solder using no-clean flux then
through a saponified wash).
Thanks for your help.
Best regards
Marc Cowen.
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