"Josepi" wrote in message
...
Water is composed hydrogen and oxygen atoms. Rust is not an atomic
chemistry
level reaction.


Water does **NOT** contain oxygen molecules unless some oxygen molecules
have been disolved in it.
This is why closed loop heating systems, made almost completely out of
iron
and steel pipe and fittings do not rust themselves out.


Which is not a scretch. Humid air going through the compression process
will condense and form water as it cools and will have oxygen molecules in
it. Just the thing needed to rust a tank.