Comment, we use have several assemblies (CCAs) that stranded jumper
wires (usually 26 AWG) are used on so water soluble fluxes (QA) can not
be used during any of our processes. We due use the AIM NC 264, Jon 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
Sent: Thursday, July 12, 2007 6:43 AM
To: [log in to unmask]
Subject: Re: [TN] No Clean flux residue after water wash

I don't know how many times it has been said here that a so-called 
"no-clean" flux is formulated primarily so that the residues are as 
benign as possible WITHOUT any cleaning process. If you choose to clean 
them, the residues may be much less benign. Fluxes that are designed to 
be cleaned are formulated to ensure the cleaning process is as easy as 
possible. I do not advise mixing types on any one assembly because you 
are negating that advantages of both. The easiest way round your problem

is to use a water-soluble flux for wave soldering (and reduce your 
retouch rate at the same time!)

Brian

Tom P. Hummel wrote:
> Fellow TechNetters,
> 
>  
> 
> We are experiencing a white residue on the solder side of some boards
> after going through our wash system.  We are wave soldering the boards
> on a SeHo wave solder machine using Aim NC-264-5 no clean flux.  The
> boards have some additional components installed by hand using water
> soluble flux/solder.  The boards are then run through our Aqueous
> Technologies SMT series board washer.  When they complete the drying
> cycle, there is a white residue on the solder side of the boards that
is
> very difficult to remove.  Has anyone else seen this residue from
> washing a board after using no clean flux?  Does anyone have any
> recommendations to help eliminate the residue?
> 
>  
> 
>  
> 
> Thomas P. Hummel
> 
> Carlton Industries Corp
> 
>  
> 
>  
> 
>  
> 
>  
> 
> 
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