From: DaveC on
What is the best method for cleaning up leaked electrolyte? This PCB has some
corrosion on IC leads and vias.

Is there a corrosion neutralizer that would be effective? Since the potential
for corrosion in places that aren't accessible (deep in the vias), a liquid
that can neutralize corrosion is called for.

Would something like DeOxit work in such an application?

This is on a Tek scope acquisition board.

Thanks.

From: N_Cook on
DaveC <invalid(a)invalid.net> wrote in message
news:0001HW.C7E60E6D00EF5EC4B01AD9AF(a)news.eternal-september.org...
> What is the best method for cleaning up leaked electrolyte? This PCB has
some
> corrosion on IC leads and vias.
>
> Is there a corrosion neutralizer that would be effective? Since the
potential
> for corrosion in places that aren't accessible (deep in the vias), a
liquid
> that can neutralize corrosion is called for.
>
> Would something like DeOxit work in such an application?
>
> This is on a Tek scope acquisition board.
>
> Thanks.
>


litmus test first to see of acidic or alkaline and go for the opposite as
cleaner ?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://diverse.4mg.com/index.htm


From: ian field on

"DaveC" <invalid(a)invalid.net> wrote in message
news:0001HW.C7E60E6D00EF5EC4B01AD9AF(a)news.eternal-september.org...
> What is the best method for cleaning up leaked electrolyte? This PCB has
> some
> corrosion on IC leads and vias.
>
> Is there a corrosion neutralizer that would be effective? Since the
> potential
> for corrosion in places that aren't accessible (deep in the vias), a
> liquid
> that can neutralize corrosion is called for.
>
> Would something like DeOxit work in such an application?
>
> This is on a Tek scope acquisition board.
>
> Thanks.
>

If you can beg or borrow an ultrasonic cleaner, ordinary water with a dash
of washing up liquid will do fine,

Any crystals or ceramic resonaters should be removed before ultrasonic
cleaning.

If the construction of any components mean they trap water, a second dip
without detergent will be needed, and you may have to bake the board to dry
everything - the pre-heat phase on a SMD oven should do it.


From: James Sweet on
DaveC wrote:
> What is the best method for cleaning up leaked electrolyte? This PCB has some
> corrosion on IC leads and vias.
>
> Is there a corrosion neutralizer that would be effective? Since the potential
> for corrosion in places that aren't accessible (deep in the vias), a liquid
> that can neutralize corrosion is called for.
>
> Would something like DeOxit work in such an application?
>
> This is on a Tek scope acquisition board.
>
> Thanks.
>


I scrub with white vinegar and a toothbrush, then rinse with alcohol. If
the corrosion is more severe, mechanical methods may be needed,
Scotchbrite type cleaning pads work well but you have to be careful not
to damage fine traces. In some cases it's best to neutralize and then
clean off as much residue as possible and then leave the remaining
corrosion alone.
From: John Larkin on
On Sat, 10 Apr 2010 11:15:57 -0700, DaveC <invalid(a)invalid.net> wrote:

>What is the best method for cleaning up leaked electrolyte? This PCB has some
>corrosion on IC leads and vias.
>
>Is there a corrosion neutralizer that would be effective? Since the potential
>for corrosion in places that aren't accessible (deep in the vias), a liquid
>that can neutralize corrosion is called for.
>
>Would something like DeOxit work in such an application?
>
>This is on a Tek scope acquisition board.
>
>Thanks.

Dishwasher.

John

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