This metal looks like iron or steel, but there appears to be blotches of rusted areas about the size of a thumbnail in random places on its surface. Despite its rusted appearance it is as hard as normal steel in all respects except as followed. Corrosium causes non-magical metals to immediately rust on contact with Corrosium. All Corrosium objects cause 1 Sq. ft. of unoccupied metal to be destroyed per round that it is in contact to that metal. Corrosium weapons in addition to normal damage, also deal 1d6 rust damage directly to armor/shield bonus given by metal armor or a shield (not both). Corrosium armor/shield when struck by metal weapons cause 1d6 rust damage directly to the metal weapon’s hp this includes successful sunders.