I have seen this a few times, often on stored items like you say. My jam jar of reclaimed connectors comes to mind. I put it down to flux crystals left after hand soldering. Flux is weird stuff and reacts oddly with many things over time, especially the weird modern mix of fluxes and lead free solders. Good clean with a stiff painbrush and some IPA and you'll be fine I think!
On Friday 25 October 2024 at 18:15:19 UTC+1 Terry S wrote: > There is also a rather strange fungus that likes to grow on certain > plastics. Ask anyone who has ever collected old radios.. > It wipes right off and take a long time to return. > > On Friday, October 25, 2024 at 12:50:13 PM UTC-4 Neil QQ wrote: > >> Terry, I believe you are correct about the plasticizer, or some such >> outgassing. At my work we ran into something similar with a big >> last-time-buy order for connectors. They looked exactly like your >> pictures. As I recall, the key to "prevention" is to allow for air >> circulation when stored, i.e. not stored in plastic bags. The stuff was >> declared "not deleterious to the functional aspects of the connector". >> They were cleaned with alcohol (don't recall which type/concentration) and >> placed back into stock. >> >> On Thursday, October 24, 2024 at 3:54:55 PM UTC-5 Nicholas Stock wrote: >> >> As they're in a sealed container, any outgassing from components/PCB etc >> may react with plastics? Just a guess.... >> >> On Thu, Oct 24, 2024 at 1:43 PM Mac Doktor <[email protected]> wrote: >> >> >> On Oct 24, 2024, at 4:40 PM, Dekatron42 <[email protected]> wrote: >> >> None of the capacitors seems to have leaked nor does any other component >> seem to be affected and nothing else looks corroded but there are some >> small droplets on one of the power connectors. >> >> >> Looks like elasticizer leaching out of the plastic but I've never seen it >> happen to something this new. >> >> >> Terry Bowman, KA4HJH >> "The Mac Doctor" >> >> https://www.astarcloseup.com >> >> "If only you could see what I've seen with your eyes."—Roy Batty, *Blade >> Runner* >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion, visit >> https://groups.google.com/d/msgid/neonixie-l/19270921-BC46-4F90-847F-EC1220D378A4%40gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/19270921-BC46-4F90-847F-EC1220D378A4%40gmail.com?utm_medium=email&utm_source=footer> >> . >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/4a329182-b440-4986-841e-84ebc04e43c9n%40googlegroups.com.
