[TheForge] why doesn't cast iron oxidize and burn in the same way?(was: oil/wax finish, blackened steel)

[Bruce Freeman]

Andy,
Yes, when you "burn" steel, the iron is oxidizing.
I'm not sure I follow the question about cast iron.  It certainly will
oxidize (rust).  Does this question refer to cutting with an oxygen
stream?

On Mon, Nov 1, 2010 at 2:29 PM, Andy Gladish <gladish at cablerocket.com> wrote:
> I was teaching metal fab for a wind turbine building class this past week
> (see www.scoraigwind.com ) this past week, and in the middle of a run of
> torch work got asked a number of times, what is actually going on when you
> burn steel...is the iron oxidizing? If so, why doesn't cast iron oxidize and
> burn in the same way?
> Anyone want to field that one?
> Andy G.

-- 
Bruce
NJ