There are different grades of steel, doped with all sorts of additives, depending on the desired traits. The most corrosion-resistant variant today used in kniv

There are different grades of steel, doped with all sorts of additives, depending on the desired traits. The most corrosion-resistant variant today used in knives would be one of the nitrogen steels, like Nitro-V. https://knifesteelnerds.com/2019/09/23/nitro-v-its-properties-and-how-to-heat-treat-it/ https://knifesteelnerds.com/2019/09/23/nitro-v-its-propertie... But they all corrode, eventually. If you want a true corrosion-resistant metal that stays (kinda) sharp, look at one of the cobalt alloys like Stellite.