- Joined
- Apr 10, 2000
- Messages
- 3,794
It's not the real test result, but just an interesting real life observation, or a confirmation of what I knew previously, in theory.
Back in 2008 I've picked up 2 Kershaw onions, CPM-110V and ZDP-189. Later on, two of my friends saw them and they both got ZDP-189 version, well 110V was out of stock already.
This summer both folders went to Hawaii, I figure Hana Maui(?). For 10 days both blades were in very humid, rainforest env.
Interesting thing is that the top blade was used daily, around saltwater, in the rain-forest and in the kitchen, including cutting fish, fruits, other small stuff, then wiped clean, worn in the pocket.
The blade on the bottom was never used, in fact it spent all 10 days in the bag, which in turn was in the room, more or less ventilated.
The result is obvious, unused blade rusted a lot more.
For that matter, my ZDP-189 folder has nothing, sitting here in CA, and my ZDP-189 Sanetsu Gyuto has absolutely no discoloration, let alone rust even though it's being used for food preparation, once a week or so(too many kitchen knives to use). I cut a lot more with that kitchen knife, and far more acidic foods, but regularly wipe the blade during the prep process and always wash afterward, dry and store in the block.
I knew, unused knives rust more in humid areas compared to the used stuff, but somehow assumed unused knives in the open, or in a knife block. Never thought a blade sitting in the bag would be subject to corrosion. By the way, there is (or was) a rust spot on the bottom blade on the clip, which is 420 steel or something similar, in other words the problem isn't ZDP-189, and a lot more stain resistant steels get rust issues in those environments as well.
As for the consequences, pretty much none, I've cleaned up both blades in 5 minutes using flitz polishing compound and that's all.
Back in 2008 I've picked up 2 Kershaw onions, CPM-110V and ZDP-189. Later on, two of my friends saw them and they both got ZDP-189 version, well 110V was out of stock already.
This summer both folders went to Hawaii, I figure Hana Maui(?). For 10 days both blades were in very humid, rainforest env.
Interesting thing is that the top blade was used daily, around saltwater, in the rain-forest and in the kitchen, including cutting fish, fruits, other small stuff, then wiped clean, worn in the pocket.
The blade on the bottom was never used, in fact it spent all 10 days in the bag, which in turn was in the room, more or less ventilated.
The result is obvious, unused blade rusted a lot more.
For that matter, my ZDP-189 folder has nothing, sitting here in CA, and my ZDP-189 Sanetsu Gyuto has absolutely no discoloration, let alone rust even though it's being used for food preparation, once a week or so(too many kitchen knives to use). I cut a lot more with that kitchen knife, and far more acidic foods, but regularly wipe the blade during the prep process and always wash afterward, dry and store in the block.I knew, unused knives rust more in humid areas compared to the used stuff, but somehow assumed unused knives in the open, or in a knife block. Never thought a blade sitting in the bag would be subject to corrosion. By the way, there is (or was) a rust spot on the bottom blade on the clip, which is 420 steel or something similar, in other words the problem isn't ZDP-189, and a lot more stain resistant steels get rust issues in those environments as well.
As for the consequences, pretty much none, I've cleaned up both blades in 5 minutes using flitz polishing compound and that's all.
Last edited:
I have no idea where in particular, I didn't go there, Ijust got the knives for sharpening/cleaning. I'll fix the location in the original post.
