[Elecraft] Cleaning solder flux

[Alan Bloom]

I believe that water-soluble flux does indeed need to be washed off to 
prevent corrosion.  That's what HP used (probably still uses) on 
production PC boards.

However, RA (rosin activated) or RMA (rosin mildly-activated) fluxes 
that are used in repair and rework (or homebrew projects) may be left in 
place.  They only need to be removed for cosmetic purposes. In fact, 
attempting to remove the flux with alcohol or another solvent can 
actually cause problems if the removal process is not complete.

Alan N1AL


On 1/2/2022 11:16 AM, Ray wrote:
> I worked at a large Computer Company in Cupertino, and we used Water Soluble Flux,
> Then washed the Boards in a Dishwasher, with Water.
> Open Air Drying to keep water from Wicking into any Parts.
>
> Ray WA6VAB  Engineering.      K3
>