wissler, all steel will rust at some level. If it has iron ,it will oxidize.... even "stainless" .that being said, I coat with a thin film of oil or Renaisance wax. this covers the steel ..slowing the oxidizing process . I try not to store i n a sheath. if you do keep in a sheath, I would oil more liberally or thin oil ,wrap blade with saran wrap then in sheath. tried to keep this short and not a chemistry class