On Mon, 18 Nov 2019 at 04:04, Alan Pearce - UKRI STFC <
alan.b.pearce@stfc.ac.uk> wrote:

> > If you were REALLY lucky (and Murphy tends to prevent such luckiness)
> > tin may be on the list of secret coatings that work. But, I doubt it.
>
> I would seriously doubt it. The Tin Whisker problem will show itself
> pretty rapidly.
>
> Tin Whiskers are a problem whatever atmosphere, vacuum and air. I don't
> know off hand about pure nitrogen or other gasses, but AFAIK the problem
> always exists. NASA and the US military have done a lot of research into
> Tin Whisker problems, and there are a number of videos on the web of them
> growing in real time, and they can grow quite fast. They also don't seem =
to
> be dependent on electrical field strength.
>
> I have some REALLY old relays.
On some of them you can clearly see a whiskery surface on various
metalwork. On others it's not apparent. Which and why not evident.


         Russell

>
>
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