Great question, Joe.
We use a water soluble paste, followed by DI water wash.
Secondary hand soldering uses RMA flux and (sigh) the fabled isopropyl alcohol localized hand cleaning. I'm also working on improving this and moving to a saponified wash for all levels of soldering....
But, for now, (and part of the basis of my concern) the hand soldering with the wire is only hand cleaned, thus my desire to take use halide-free and hopefully make it less risky...
Kevin Glidden
Manufacturing Engineer
Astronics Luminescent Systems Inc.
-----Original Message-----
From: Kane, Joseph E (US SSA) [mailto:[log in to unmask]]
Sent: Monday, April 19, 2010 11:33 AM
To: [log in to unmask]
Subject: Re: [TN] Flux-Cored Wire Solder: Halide / Halide-Free
Kevin:
Are you cleaning off the flux residues? If this is a no-clean
process, and you're leaving residues on, then interactions between
the chemistries become more important.
-Joe
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Glidden, Kevin
Sent: Monday, April 19, 2010 11:18 AM
To: [log in to unmask]
Subject: [TN] Flux-Cored Wire Solder: Halide / Halide-Free
Greetings,
I've recently been looking into changing out some solder materials. I was forced to change solder pastes due to product obsolescence. I am now in the process of verifying compatibility of the hand soldering fluxes and solders with the new paste. My current paste is halide-free. My current flux cored wire solder is not. I asked a supplier about halide-free flux-cored wire solder and the basic response is that you can get it, but it's really non-standard, so it's a lot more expensive with larger min-buys. Indeed, after I looked at a few websites about product offerings, it appears most flux-cored wire solders are not halide-free. I understand that I can basically use any materials I like as long as I test it out and can prove my "recipe" is safe to the overall product reliability, but seemingly halide-free is a safer way to in general.
So I am wondering:
1) Am I worrying about nothing (matching halide-free paste with halide free solder wires)?
2) Is it really not all that common to use halide-free flux-cored wire solders?
As always, thank you in advance...
Kevin Glidden
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