I agree, the corrosion resistance is outstanding, especially the D3V, theres a photo on their instagram that shows the significant improvement.
But let's say hypothetically, if that knife was given to you in that condition (the 1 year one) and you didn't have tools to clean it up like Guy did (because you in an isolated environment), would you still take it over 20cv? What i am getting is, do you think the knife's performance is disadvantaged or affected negatively in any way (besides aesthetics) if the corrosion resistance is built up over a year and still remains long-term while performing?
This is all out of interest^
the more i read about the carbon vs stainless knives for any situation be that; survival, BC, tactical, shtf siruations, the more I see a divide between those who prefer stainless and those who prefer high-carbon steels. Surely thats not because of aesthetics right? I don't understand why there are two sides to this. Shouldn't the tough steel be the preferred not the more rust resistant one? Its almost like the choil vs no choil divide lol.
Don't mean to pick on you hahaha....but maybe you can shed some light on this?
Your first question: Would I take the 1 year old knife in an isolated situation? Yes, I would still take the 3v over 20cv assuming that I have the ability to sharpen either knife. I handled both knives and Guy confirmed that both were structurally sound.
Your second question: Do I think the knife's performance is effected by 12 months of corrosion? Is that knife capable of continuing to perform in the long term? No to the first, see my above answer. Yes to the second, again based on handling the knife and speaking with Guy. I would find some sand and try to take off the surface rust but 3v doesn't seem to erode like 1095, 10x5, 01 and other high carbon steels when exposed to long term moisture. Guy proves this in his video and again I handled those 2 knifes and another he was testing. They were all structurally fine and as long as I could resharpen them I would use them in the field long term.
My challenge with stainless steels is that it can't take the beating that high carbon steels can. Over the past 3 years I've been using 20cv and 3v and I've found that I can sharpen either in about the same amount of time. That in addition to the fact that 3v stays sharper longer than 20cv makes me want to use 3v. You can wipe off the surface rust on a 3v blade and not have much worry if you take care of it. In the same situation, long term survival/outdoors, and I had a choice between 1095, 01 or even CFV in an uncoated blade I would choose 20cv. But if the blade was coated I would CFV or 01 over 20cv because I believe the high carbon blades would have a less of a chance to chip when batoning and chopping.
In the extreme, like a jungle, I would probably change my mind about this debate unless I could get a coated 3v knife. I've seen pictures of ESEE knives that have been used in jungle camps. The coating gets pretty beat up but it seems to protect the 1095 steel.
In summary 3v can get surface stains that can be removed with steel wool or sand and elbow grease. It doesn't seem to decay like other high carbon steels. Guy wasn't concerned about the structural integrity of these knives. He wouldn't let me buy any of these test knives because he doesn't sell used knives.
Lastly, I am NOT an expert. I am answering your questions based on what I saw and handled at the old PA S!K shop and several conversations with Guy about these knives and the steels he uses. I have been out in the field with my S!Ks for days not weeks. I am pretty hard on my knives but most of this is work at home or on hikes in my area.
I know you're not picking on me but this is a great debate. Here's another string which might help as well:
http://www.bladeforums.com/forums/showthread.php/1455343-CFV-vs-3v-vs-20cv-vs-154
Here's my S!K steel stack rank based on (in order of preference) edge strength, ease of sharpening, edge retention and ease of maintenance/corrosion resistance:
second gen heat treat 3v
CFV
second gen 20cv
original 3v
original 20cv for light to med tasks ONLY otherwise I don't like the steel.
So this begs the question, how would you rank the following: edge strength, edge retention and ease of sharpening and ease of maintenance/corrosion resistance (meaning of these 4 properties what's your order of preference)? Again I think the new 3v is the king of the heap.