I’ll put a good edge on a carbon blade then before I put it away I run it through wax to prevent any corrosion while it’s stowed away. I’ll pull it out and it seems to have lost its level of sharpness that I had it at. Talking to a buddy (79 years old) that’s used knives all his life from ranch work to jungle use and he has edges that seem to loose their edge after being stored away also. I guess what I’m wondering is do blades corrode at a like micro level or something that’s not visible but does effect the edge.