Obviously a nightmare ...
Ethylene glycol is soluble in water (of course), alcohol, ether, and acetone to various degrees. One or a combination of these ought to work.
It is not understood what a "saponified solution" means? [Generally, saponification refers to reaction of lie and fat to generate soap]. If soap was added, it is likely insoluble in the ethylene glycol and precipitating as a white haze. More water ought to remove this.
If one speaks of an alkaline solution, this could represent attack of the soldermask because that is how soldermask is stripped. A solvent - solvent removal would probably be best eliminating detergents or soaps on the first pass -- I cannot say I ever had to do this, though, so good luck.
Paul Wilson
Manager of R&D / Plant Chemist
Circuit Center, Inc., 4738 Gateway Circle, Dayton, OH 45440
[log in to unmask]
----------
> Well, here's one for the books... We have two in-circuit testers located next
> to each other. Last week, during the night, an air-conditioning unit located
> in the ceiling directly above the testers sprung a leak, dumping a couple of
> gallons of ethylene glycol (heat transfer fluid) on the testers. (It seems
> that the occasional condensation from the air-conditioner warranted a plastic
> sheet be placed under the unit, above the ceiling tiles. So when the leak
> started, it collected in the plastic until the ceiling gave out!)
>
> Now, the questions:
>
> 1) The internal circuit boards plug into a mother board, so they can be
> removed
> easily. Cleaning the boards in a saponified solution resulted in a white haze
> on the boards. What might this be?
>
> 2) The boards were cleaned, but only half are working properly. We expect
> some
> residue is left behind in some connectors. What is the best way to clean
> these
> boards?
>
> 3) What is the long-term problem expected if residue is left behind?
>
> Thanks for your help,
> ICTless in NY
>
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