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Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 22 Jan 2004 16:33:06 -0500 |
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Yes . More than likely organics acids & resins.
Rich Kraszewski
Advanced Manufacturing Engineer - KEDS
Phone: 260.925.8919
Pager: 812.481.3492
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Matthew Park
Sent: Thursday, January 22, 2004 4:18 PM
To: [log in to unmask]
Subject: [TN] white no clean flux residue
I'm seeking input/confirmation about a problem I am observing for no
clean wave soldering process. The problem is a constant build-up of
white powdery flux residue in/around flux spray system. Our wave
operators remove the residue around spray nozzle every 2/4 hours with
brush/alcohol. It gets build-up quickly around the whole spray flux
system.
Boards that are wave processed have invisible white residue. It requires
a clean wipe to see some. This flux is alcohol-based no clean with 2%
resin as solid content. I am used to using alcohol-based no clean with
organic chemistry as flux activator and didn't have any issue with white
flux residue build-up.
J-STD-004 calls out four classifications of flux composition
(Rosin/Resin/Organic/Inorganic). Is white powdery residue build-up from
resin formulation in the flux we are using?
any thoughts?
thanks
Matthew S. Park
Preco Electronics
tel: (309)-263-7788
fax: (309)-266-6674
1651 N. Main Morton. IL 61550
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