>When you burn propane or acetylene or any hydrocarbon, the hydrogen
combines
>with oxygen to form water. It condenses on anything cool.
>2C2H2+5O2=4CO2+2H2O. 2 acetylene molecules combines with 5 Oxygen molecules
>to form 2 carbon dioxides and 2 water molecules.
Hi Bob,
I knew somebody smart could help us. Next question, though, is does this
actually mean that steel does not contain water? There are a couple of
peculiarities about the appearance of water during heating that look more
like water being drawn out than water being condensed.
1. The water only appears in the heated zone. You'd thing that if the
water was a condensate by-product of the gas, that it would condense more on
the cooler edges than in the heated middle.
2. The water appears at the beginning of the process and then disappears.
This is consistent with the idea that the heat is forcing out a finite
amount of water contained in the steel. If the water were coming from the
gas, wouldn't it be deposited at a constant rate instead of appearing only
at the beginning of the process?
Of course, the steel may simply get too hot to allow further condensation on
its surface, but what I'm talking about can be seen with a torch pass or two
over the surface, which on a big piece of steel, doesn't put much heat into
the outlying areas, so there ought to be plenty of cooler areas to see the
condensation.
Wish I'd paid more attention in school.
Regards,
Grant S.
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