alt.energy.homepower

"David Williams" < @ > wrote in message
news: @ ...
>-> Tin degrades as well, it produces small hair-like crystals over
>time.
>
> As Napoleon discovered near Moscow. The tin buttons on his officers'
> uniforms disintegrated in the cold of a Russian winter.
>
> But warm tin is stable.
>

There not really a problem in power circuits, but google 'tin whisker' and
you'll find some surprising problems with 'warm' tin-lead solder. The tin
will grow 'whiskers' that can actually short out digital equipment and
low-power signal circuits.

daestrom