Yes Grant, it was colder than the air temperature. The steel had been
stored outside and was probably 30-40 degrees or so when I put some heat to
it. It was actually a large cylinder on which we were going to perform a
vacuum leak test, and you don't want to be pumping water vapor through a
vacuum pump, hence the heating to drive out the chill. Also due to to
nuclear guidelines, we can't weld on material if it is below 50 degrees F.
Wally
>
> Was the plate colder than the air? And did the water appear over the
whole
> surface? That would make sense to me as condensation.
>
> Or perhaps the oxygen and other gasses bond with some hydrogen and
> precipitate out as water. I guess that could explain why the water
appears
> in the heat zone, rather than over the whole surface. I'll have to ask my
> scientist friend about it.
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