Brian and Reuven,
Many aircraft materials are required these days to be "non-nutrient" or to
contain nothing that a fungus would consider to be food, thereby
encouraging growth.  Some coatings go a step further by incorporating a
biocidal agent.  I know that sometimes our units come back into the service
centers with green fuzzy layers growing on them from pilots spilling coffee
with cream and sugar, or sugared soft drinks, which gives the fungus (damn
spores are everywhere) something to feed upon.  Having biocidal material
built in can be a more active defense against fungus growth.

Doug Pauls



                                                                           
             Brian Ellis                                                   
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             04/10/2007 04:57                                      Subject 
             AM                        Re: [TN] Fongus treatment           
                                                                           
                                                                           
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Fungicides used to be added to phenol-formaldehyde lacquers, in the days
when all printed circuits were on cheap paper-based laminates (early
1950s, because the paper coating treater was poor in uniformity before
stacking prior to pressing. However, that was also in the days when
anode voltages were typically 250 V. I remember that 20 or so years ago,
some conformal coatings contained fungostats and bacteriostats, but I
haven't a clue whether they are still available. Normally, I would not
expect modern materials to support mycelia penetration, so fungostats or
fungicides should not be necessary. Beware that many fungicides are
based on ionic metal salts!

Brian

Reuven Rokah wrote:
>
> One of our potential customer is interesting with "Fungus treatment" for
> assemblies and cables.
>
> Do you familiar with such process?
>
> Thanks
>
> Reuven
>
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