RUSTED METALS

iron oxide still has iron in it.

When placed in a reducing environment the Oxygen is removed leaving behind iron. So yes. All iron comes from Iron oxide ores to begin with.
 

now does brass rust? This was suppose to be a brass fitting and was left in the elements.
 

Brass and copper, depending on how long it's left to the elements, will oxidize and turn to brown and green.

GG
 

But keep in mind that that is not rust. That is crystalization on the surface of the metal. Similar to galvanic corrosion on aluminum. So don't worry, the brass and copper underneath is just fine.
 

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