Hi Joe,

We use them quite a bit for standing off axial parts, and there's a few
boards that we stand off crystals, oscillators, and can transistors too.

We don't use the effervescent type, never have had a problem  washing the
normal ones away. We clean in an Electrovert H-500 inline cleaner using
straight DI water, and we have an Electrovert MCS-1000 that we use Kyzen XJN
in. Both machines clean the spacers just fine, with no ill effects with
either machine.

We do quite a bit of conformal coating (Acrylic and Urethane), and never have
had an issue because of the spacers...

Hope this helps,

-Steve Gregory-


> Anyone had success using wash-away spacers during wave-soldering, then
> removing them by aqueous cleaning?  We're looking at them mostly to
> control standoff of transistor cans and vertically-mounted resistors.
>
> Looking at the Bivar catalog, spacers come in two types, normal and
> "effervescent", which dissolve more quickly.
>
> Do they wash away completely?  Leave any residue that affects conformal
> coat adhesion?  Any problems with the materials reacting with the wash
> chemistry, either saponifier or alcohol based?
>
> Joe Kane
> BAE SYSTEMS Controls
> Johnson City, NY
>



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