K390 & Corrosion

Discuss Spyderco's products and history.
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The Mastiff
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Re: K390 & Corrosion

Postby The Mastiff » Wed Nov 06, 2019 10:18 am

I decided to put some Liquid Glass on the blade. None went on the pivot area. I should have about Five coats on before the end of the day.
I don't think we have heard from anyone else regarding Liquid Glass. Please don't forget to let us know what you think after having used it for a while.

Joe

sok
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Re: K390 & Corrosion

Postby sok » Wed Nov 06, 2019 10:43 am

The Mastiff wrote:
Wed Nov 06, 2019 10:18 am
I decided to put some Liquid Glass on the blade. None went on the pivot area. I should have about Five coats on before the end of the day.
I don't think we have heard from anyone else regarding Liquid Glass. Please don't forget to let us know what you think after having used it for a while.

Joe
For sure, I will report back in a few months. I have the same setup in a PM2 that I will leave naked. It has been a good battle between the two models, so they should get plenty of use.

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jpm2
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Re: K390 & Corrosion

Postby jpm2 » Wed Nov 06, 2019 6:46 pm

GarageBoy wrote:
Wed Nov 06, 2019 7:55 am
When people carried 1095 knives, how did they deal?
When?
I carry a 1095 bladed knife every day, as I have for decades. The only time it sees oil is when the pivot(s) get a little gunked up.
The only time it corrodes is when it goes too long without use, which is rare. When it does happen, it's no longer than 24 hours old, and fairly light.
It is thoroughly stained though.

The Meat man
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Re: K390 & Corrosion

Postby The Meat man » Wed Nov 06, 2019 7:49 pm

sok wrote:
Wed Nov 06, 2019 10:43 am
The Mastiff wrote:
Wed Nov 06, 2019 10:18 am
I decided to put some Liquid Glass on the blade. None went on the pivot area. I should have about Five coats on before the end of the day.
I don't think we have heard from anyone else regarding Liquid Glass. Please don't forget to let us know what you think after having used it for a while.

Joe
For sure, I will report back in a few months. I have the same setup in a PM2 that I will leave naked. It has been a good battle between the two models, so they should get plenty of use.

I've never heard of Liquid Glass. I am all agog to hear how it works out for you.
- Connor

Jesus said, "I am the way, the truth, and the life: no man cometh unto the Father, but by me." (John 14:6)

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Ankerson
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Re: K390 & Corrosion

Postby Ankerson » Wed Nov 06, 2019 7:57 pm

kennethsime wrote:
Mon Nov 04, 2019 10:41 pm
Hi all,

Long hiatus from the knife game, but I'm back in with a K390 PM2 from BBS (and now a Para3 on the way). It's a fantastic knife, and I couldn't be happier.

I've carried knives in VG-10, ZDP-189, and S30V (ok and cheap stuff), never a tool steel. I know that K390 is a powdered tool steel, and that it's more likely to corrode than anything I've carried before. I also know that some people go out of their way to "force" a patina on their M4 knives. I should mention that I'm a user - I don't own a safe, and hold no safe queens.

My question is: How many of you are actually oiling your K390 blades, or doing something else to inhibit corrosion? I've been carrying & using mine every day for the better part of a month now and there's no sign of any corrosion yet.


I wouldn't worry about it too much, just carry and use it.

The only time I would even think about it is if I was going to be around salt water a lot.

K390 won't corrode THAT easy...

sok
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Re: K390 & Corrosion

Postby sok » Wed Nov 06, 2019 10:38 pm

The Meat man wrote:
Wed Nov 06, 2019 7:49 pm
sok wrote:
Wed Nov 06, 2019 10:43 am
The Mastiff wrote:
Wed Nov 06, 2019 10:18 am
I decided to put some Liquid Glass on the blade. None went on the pivot area. I should have about Five coats on before the end of the day.
I don't think we have heard from anyone else regarding Liquid Glass. Please don't forget to let us know what you think after having used it for a while.

Joe
For sure, I will report back in a few months. I have the same setup in a PM2 that I will leave naked. It has been a good battle between the two models, so they should get plenty of use.

I've never heard of Liquid Glass. I am all agog to hear how it works out for you.
I have used it for 30 years. It is getting hard to find and expensive lately. A lot of people swear by it. We’ll see what happens
https://www.ebay.com/urw/Liquid-Glass- ... itedDate

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Pelagic
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Re: K390 & Corrosion

Postby Pelagic » Thu Nov 07, 2019 3:01 am

Ordered some tuff glide and tuff cloth for my k390 pm2. We'll see how this goes.
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kennethsime
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Re: K390 & Corrosion

Postby kennethsime » Fri Nov 08, 2019 12:02 am

Ankerson wrote:
Wed Nov 06, 2019 7:57 pm
I wouldn't worry about it too much, just carry and use it.

The only time I would even think about it is if I was going to be around salt water a lot.

K390 won't corrode THAT easy...
Thank you all for your responses, I feel much more at ease. Also great to see some familiar faces names from nearly 10 years ago still around.

I think for now I'm going to leave them uncoated, and see how it goes. I use my knives, but I don't leave lemon juice sitting on them or anything.

The Para 3 came today, and it is excellent. It's the first I've had this model, and I'm going to give it dedicated pocket time for a week or so.
C90GRE Stretch 2 ZDP-189 British Racing Green
C28GRE2 Dragonfly 2 ZDP-189 British Racing Green
C12BK2W Matriarch 2 Emerson Open
C81G2 Para Military 2
C81GPRGR2 Para Military 2 K390 Ranger Green
C223GPRGR Para 3 K390 Ranger Green

Matt Deaner
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Re: K390 & Corrosion

Postby Matt Deaner » Fri Nov 08, 2019 6:20 pm

I have not found K390 to be very prone to corrosion. I carried a police 4 for almost a year and only oiled it during the hottest months. It fared quite well. I have had some pitting on it’s cousin, cpm 10v. Not sure why.

I have been using vasaline and chapstick as rust preventive.

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The Mastiff
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Re: K390 & Corrosion

Postby The Mastiff » Fri Nov 08, 2019 9:38 pm

For me, K390 is worth the small amount of care I give it in comparison to my baseline standard VG 10 Endura. It really is a wonderful performing steel. I usually expect noticeable trade offs with steels that wear resistant but this steel really isn't chippy or touchy on the stones and sharpens very well. I'm really not sure how much of that is Spyderco's heat treat because so far Spyderco is the only knife I've used this steel in. It has impressed me enough to buy an extra P4 as a spare which is something I have been trying to avoid.

Joe

steeljustice
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Re: K390 & Corrosion

Postby steeljustice » Sun Nov 10, 2019 7:10 am

There is nothing i have ever found that will protect against rust and Corrosion on steels better then CorrosionX.

Slashymac
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Re: K390 & Corrosion

Postby Slashymac » Tue Nov 26, 2019 10:33 pm

Here’s mine
I didn’t go out of my way but I wasn’t super anal about making sure it was wiped off and she is beautiful
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E4F7D75C-343D-4575-9362-85F83F837A2B.jpeg

TomAiello
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Re: K390 & Corrosion

Postby TomAiello » Wed Nov 27, 2019 3:02 pm

I finally picked up real corrosion on my P4. I loaned it out to someone who carried it IWB, and then I forgot to clean it up when I got it back, and stuck it in my drawer. Definite rust on there the next time I pulled it out. Cleaned it up pretty quickly, though, and now it's good to go again.

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Vivi
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Re: K390 & Corrosion

Postby Vivi » Wed Nov 27, 2019 3:23 pm

TomAiello wrote:
Wed Nov 27, 2019 3:02 pm
I finally picked up real corrosion on my P4. I loaned it out to someone who carried it IWB, and then I forgot to clean it up when I got it back, and stuck it in my drawer. Definite rust on there the next time I pulled it out. Cleaned it up pretty quickly, though, and now it's good to go again.
Anything on the liners? I've had better luck with the corrosion resistance of my blade vs the liners on my Police....

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Cambertree
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Re: K390 & Corrosion

Postby Cambertree » Wed Nov 27, 2019 11:22 pm

I wipe a little mineral oil on my P4 and Urban from time to time, mostly if I'm setting it aside for a while.

I wipe and dry after cutting wet or acidic materials like doing food prep.


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