PastaLover wrote:

> Iron oxide is RUST. Something isn't right if you have iron oxide!

There are two kinds of iron oxide. To quote what hob wrote three days ago
when you weren't paying attention:

| the black on a cast iron pan is iron oxide.
|
| red rust is also iron oxide.
|
| --one is ferric oxide, and the other is ferrous oxide.
|
| red rust will not form where black oxide is formed, if the black is
| sufficiently thick and complete.

Ask anybody with even a rudimentary knowledge of chemistry, metallurgy, or
boiler maintenance.

Bob