A patina wont completely stop rust from forming, it will just take longer for the rust to form. Hypothetically, a patina could outright prevent rust, assuming the knife was previously being pushed just a bit beyond it's corrosion resistance abilities.TkoK83Spy wrote: ↑Tue Oct 06, 2020 1:31 pmMy understanding is a patina is a barrier against rust/corrosion? Once you form a patina, that area won't rust? I feel like I've read that before. My Vtoku2 Dragonfly and when I had my Hap40 Delica, both have/had a patina at the laminate line but no rust.Wartstein wrote: ↑Tue Oct 06, 2020 1:08 pmThis puzzles me again and again. The "composition of sweat" or perhaps the combination of ones sweat and the climate they live in must have such a crazy wide range..
I am sure my knives see a pretty similar exposure to sweat and the elements as Vivis does. Carry them on hot summer days in pocket or IWB, sweat a lot, they live in soaking wet pockets and packs, I cut all kinds of stuff including food, I don´t oil them (except the pivot area occasionally) and don´t always dry them when I could: But I almost can´t rust knives and really don´t know why
Even my HAP 40 blades only show a patina but no rust (on exposed HAP 40 part, the SUS 410 does not rust anyway), only my pretty new Manix 2 LW in REX 45 (not babied at all, and used for cutting fruit and meat several times already) shows tiny specs under a certain angle and light....
Both rust and patinas are forms of corrosion.