RussellMc wrote:
>> >I think I would promptly retire that PCB... it rather reminds me of one=
=20
>> >that the factory manager had where I worked, from a car radio that fell=
=20
>> >into the flow solder bath - came out fully encapsulated. I don't know=20
>> >how they got it out, presumably they emptied the bath periodically.
>>
>> Pretty much anything will float on solder...
>
> A good idea  would be to NOT drop in anything that wouldn't float that
> had a core that "volatilised" at temperatures below solder melting
> point.
>
> I was shown around an aluminum manufacturing plant by a friend. Not a
> smelter - they took ingots from a smelter and
> cast/rolled/milled/melted ... them into other product.
>
> They had a largish induction furnace - 50 Hz mains was used to induce
> umpteen kiloWatts into a load of Al to be smelted. They recycled
> material using it. He said the trick was to always very very very
> carefully remove rubbish from incoming Al before melting. A bottle of
> water or softdrink could be lethal - carried into midst of scrap and
> buried and then Al is induction melted around it. Steam bomb :-(.
> Apparently people have died that way. A big enough solder bath should
> make a 'good' substitute for that.

My first experience with tinning pins resulted in a mini-explosion with=20
burning material sprayed everywhere. Put lots of flux on the pins (14=20
total). Rapidly dip the pins in molten solder. Sh-plat!

Vitaliy=20

--=20
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