Steel is an alloy of iron and other
materials,especially carbon. The
corrosion-resistant properties of steel are
related somehow to the chemical relationship
between the various elements in the alloy.
Probably the carbon oxidizes the iron so that
oxygen has less of a time getting at it, but
chemically it should still be possible to rust it
because oxygen is far better at oxidizing metals
than carbon is. At a guess, it somehow raises the
energy threshold required to do corrosion in the
first place,so that stainless steel will not
corrode except under very high temperatures, in
which it surely will.
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