Many people on the Internet say that the metal in the meteorite is elemental iron and will not rust. I don't know what their purpose is or to fool people.
I sent this rusty meteorite, suspected to be OFB type, because of its special formation, not as tight as the stone meteorite, is composed of clay-type silicate and metal particles, relatively loose.
Coupled with the long time of falling to the earth, the water is easily soaked into the interior, and the metal rusts and weathers inside.