All of my knives are kept and used indoors. I transport them in the car and outdoors —in a carrying case—year round.
I just KNEW it. Store your knife dry in a trunk/toolbox/emergency kit for a year, and let us know the findings please. Just kidding of course.
ETA: Where I live, I cannot even get away with storing them in the HOUSE without some extra measures like I posted earlier. Indoors, I've found it's either a light coating of oil, OR a silica pack in the container, don't need both. Outdoors, where I keep a knife in an emergency kit in the car, have to coat with a heavy coat of CorrosionX and update every so many months, especially on carbon steel.
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