They're made from unicorn horns, so if unicorn's are anti-corrosive....yes.
That's just being absurd. Unicorns aren't even real! If anyone is SERIOUSLY asking, those CZ mags appear to be manufactured from aerospace quality Unobtainium, then polished and PVD coated with a very thin layer of UnCNi (Unobtainium Carbo-nitride).