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'[EE]: PCB cleaning'
2005\08\27@064554 by Philip Pemberton

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Hi folks,
 Does anyone know of a way to remove rosin flux and clear lacquer
(Electrolube CPL) from an uncoated PCB? I've been using a toothbrush and
isopropyl, but that doesn't seem to be particularly effective - it takes a
lot of scrubbing to get the flux off and tends to leave a sticky flux residue
on the board.
 Does anyone know of anything that will remove flux, but not leave the
sticky residue?

Thanks.
--
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2005\08\27@071015 by Debbie

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--- Philip Pemberton <.....philpemKILLspamspam@spam@dsl.pipex.com> wrote:

> Hi folks,
>   Does anyone know of a way to remove rosin flux and clear lacquer
> (Electrolube CPL) from an uncoated PCB? I've been using a toothbrush and
> isopropyl, but that doesn't seem to be particularly effective - it takes a
> lot of scrubbing to get the flux off and tends to leave a sticky flux residue
> on the board.
>   Does anyone know of anything that will remove flux, but not leave the
> sticky residue?

Caustic Soda (Sodium Hydroxide, NaOH) usually softens organics. Maybe try that,
then scrubbing, Cooper-Brite etc?
Debbie

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2005\08\27@105033 by Bob Axtell

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Debbie wrote:

{Quote hidden}

For normal cleaning we use ethyl ("denatured") alcohol, as isopropyl is
not much of a solvent.
We use acetone ("fingernail polish remover" as a final cleanup only,
because it dissolves some
plastics used in our industry.

--Bob

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2005\08\27@112926 by Robert Young

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>
>
> Hi folks,
>   Does anyone know of a way to remove rosin flux and clear
> lacquer (Electrolube CPL) from an uncoated PCB? I've been
> using a toothbrush and isopropyl, but that doesn't seem to be
> particularly effective - it takes a lot of scrubbing to get
> the flux off and tends to leave a sticky flux residue on the board.
>   Does anyone know of anything that will remove flux, but not
> leave the sticky residue?


If the board is UNPOPULATED, then acetone will do a pretty good job.

If the board is populated there are several comercial board cleaners.
Techspray is a good company.  Also AIM makes "Aimterge" (probably
spelled it wrong, combination of AIM and detergent).  That is a
saponifier that you mix 1:10 with water (distilled or de-ionized is
best) and scrub.  Very good stuff but you can only buy it by the gallon
(maybe $40).  But a gallon will last a very long time.  I think Kester
makes a similar product.

Rob

2005\08\27@130623 by Gaston Gagnon

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Philip Pemberton wrote:

>Hi folks,
>  Does anyone know of a way to remove rosin flux and clear lacquer
>(Electrolube CPL) from an uncoated PCB? I've been using a toothbrush and
>isopropyl, but that doesn't seem to be particularly effective - it takes a
>lot of scrubbing to get the flux off and tends to leave a sticky flux residue
>on the board.
>  Does anyone know of anything that will remove flux, but not leave the
>sticky residue?
>
>Thanks.
>  
>
I use Poly-Clens (by Lepage in Canada). Read this article.
http://www.cam.org/~burt/circuits/clen-pcb.html

Gaston Gagnon

2005\08\27@195310 by Jesse Lackey

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For flux, I use "flux remover for PC boards" by MG chemicals, I buy it
from circuitspecialists.com.  Jameco also sells a flux remover made by
somebody else (techspray, I think), both work well.  A quick blast from
the can then toothbrush.  I always clean boards after soldering, I'm not
too convinced by "no-clean solder" and I like radio shack solder better
anyway.

Buy a couple of cans, you have to ship this stuff ground.

Not sure about the lacquer.  Both jameco and circuitspecialists also
sell more general purpose cleaners, but they aren't as good for flux
specifically.

J


Robert Young wrote:
{Quote hidden}

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