Dear Technos,

 

There are cases when we need to rework components on conformally coated
boards. In some cases the boards cannot be completely stripped due to
funky components, so we need to locally remove the CC, repair with
no-clean (a few weeks ago I've got answers on Technet that acylic cc
cannot be sent into the washer) and then re-apply coating.

 

The questions I have now are regarding cc over no-clean:

*         Will acrylic, namely 1B31, properly stick to the no-clean
residue and for long enough? 

*         Oftenly when soldering we need to add liquid no-clean flux,
which will spread and leave that white residue. Should it be wiped with
alcohol?

 

I know there are tons of issues with improperly cleaned residue and
alcohol will only spread the stuff around, etc., but I would like to
have a pragmatic point of view: what do you do in cases like this?

 

Thanks,

 

Ioan


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