I would say you have a problem. Saponifier usually has, inter alia, two
components, an amine and a surfactant. The amine, commonly
monoethanolamine, is ionic and the surfactant is commonly an ethylene
glycol or similar. The latter has a low vapour pressure and is
hygroscopic (and this generally applies to all surfactants, even if the
chemistry family is different. It can also form a matrix which can hold
the amine in suspension, slowing down iôts evaporation.
The idea of leaving hygroscopic residues is anathema to me. If they are
mixed with an ionic residue, it is double anathema.
IMHO, and in my experience, saponifier cleaning MUST be followed, not by
a simple rinse cycle, but by a full wash and rinse cycle, exactly as if
it were a water-soluble flux.
Brian
- bogert wrote:
> May 5, 2008
>
> I have the following question: If a saponifier is used with a DI
> cleaning machine to clean PWAs and the cleaning does not remove all
> traces of the saponifier, is there any concern, including sugsequent
> exposure, to a humid environment? Any technical reports on this subject?
>
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