Steve,
The
correct way to process this kind of wire is to pre-tin using a Rosin based RA
flux in a solder pot. If you can get your hands on an ultra-sonic solder pot,
these work great on nickel plated wire. Clean wires with IPA or other rosin flux
removing solvent.
Once
the wire is tinned, ordinary RMA flux will solder the wire.
I
never use any OA flux with any kind of wire, period.
I hope
this helps. Glad that you stayed on. We're still reeling from Moonman leaving
the scene.
Bill Kasprzak
Moog Inc, Electronics Process Engineering
Hi All,
I was posed this question
by one of our customers. I don't have any experience with nickel plated wire,
but it would seem to me to be difficult to solder to. I've used tin plated,
and silver plated wire before with no problems. But I didn't know that silver
plated wire had corrosion problems. Any inputs?
In the future we are
going to be changing to specify a nickel plated wire (M22759/10-28-9) for PWA
repair. The previous part number was a silver plated wire. We
haven't used this before. Do you or any of your manufacturing people
know of issues with solderabiliby when using a nickel plated wire or any
special process that should be used?
The history of this is IPC-7721
paragraph 6.1 says silver plated wire must not be used because it can cause
corrosion of wire in certain situations. Turns out that when you follow
MIL-23200 the allowed wire is either silver plated or nickel plated. We
would have preferred tin plated wire but it doesn't appear to fall under the
allowed MIL-23200 options.
Thanks in advance!!!
-Steve
Gregory-
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