"Dan Dubosky" wrote in
:


"mike" wrote in message
news:tUg8k.29$od.22@trnddc07...
It's not just the water. it's the other stuff that's already on the
board.
Flux residue, electrolyte leaking out of caps, glues used in the
assembly process. Whether or not the final inspector belched on it,
Whether the cat peed on or near it. I'm gonna go out on a limb and
suggest that water is never the problem. It's what is in the water
that causes the grief. Water just ionizes it and makes it mobile.

--
Good point, Mike. There may have been something on the cell phone board
that was not on my experimental board. I did however scrub the cell
phone board twice with Radio Shack Electronics Cleaner and I think that
there is still some effects left from the submersion. I only did the
experiment since I thought that some were suggesting that there was some
corrosive residue created by the material in the less than pure water,
but they may in fact have been referring to residue materials of the
type that you have suggested.

It is likely that some SMT components or other components still have
conductive residue between the part and the board.

I 'repaired' a laptop computer that had 'merlott' [wine] spilled in it.
It was left powered on over the weekend.

The repair consisted of
remove power sources
disassembly
Rinse with plenty of clean water
rinse with alcohol
scrubbing and scraping to remove visible conductive paths. rinse that area
with water and alcohol.
rebuilding a couple of conductors that had been eaten away
completely drying. Many hours of sitting in the flow of warm, dry air from
an air vent. The keyboard took a long time to dry.
reassembly.






--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

remove ch100-5 to avoid spam trap