CTS-XHP corrosion

[damiand]

Hello, After taking my Chaparral out of my pocket I realized that it had gray stains (not like rust), there is some humidity where I live and I had to clean it since it had small drops of humidity, I have only been using it for 1 week and this is happening! I thought CTS-XHP was corrosion resistant. What I can do? Should I worry?

[Airlsee]

It appears worry is in your nature...

[JRinFL]

It is corrosion resistant, however it is not corrosion proof. The grey stain is likely what is commonly referred to as patina. Overtime it will build up and darken the blade unevenly. To clean this off you will need to use something like Flitz and a clean soft cloth. Be careful of the edge, of course.

Some people prefer the look of a blade with patina.

[JSumm]

Patina


Corrosion


1 cool. 1 bad

[ladybug93]

my xhp manix has lived in hawaii, florida, and the coastal bogs of virginia and i've never had any patina on my blade. post pictures so we can see what you're talking about. i've never seen patina on xhp or heard of anyone else having issues with it.

[Soanso McMasters]

If you’re cutting through tape it could be some adhesive residue as well.

[bearfacedkiller]

Your capacity to over think things is impressive.

[S-3 ranch]

Do a search if you want
viewtopic.php?t=76212

It’s a knife use it , keep it sharp, don’t abuse it, or buy some box cutter and extra blades
This is probably your best choice, unless you are a trolling kinda guy

[zhyla]

Return it and buy a Cold Steel.

[Manixguy@1994]

Ok …… How about posting a picture of this phenomenon ? I actually live in a humid state never have seen on my blade what you are referring to . Sometimes pictures speak louder than words . MG2

[Toucan]

my xhp manix has lived in hawaii, florida, and the coastal bogs of virginia and i've never had any patina on my blade. post pictures so we can see what you're talking about. i've never seen patina on xhp or heard of anyone else having issues with it.

I'd never heard of xhp patina either, but this person got some on their Techno
viewtopic.php?t=76212

[zhyla]

Ok …… How about posting a picture of this phenomenon ? I actually live in a humid state never have seen on my blade what you are referring to . Sometimes pictures speak louder than words . MG2

He would have to actually own a Chaparral to post a picture of it.

[JSumm]

I don't know if humidity has even patina my K390. Meat or acidic foods, yes. I just cut into some steak packaging to grill tonight and already have more blue on the K390.

I have trimmed meat with my old Chaparral and never got a hint of patina.

Need pictures!

[kennethsime]

Hello, After taking my Chaparral out of my pocket I realized that it had gray stains (not like rust), there is some humidity where I live and I had to clean it since it had small drops of humidity, I have only been using it for 1 week and this is happening! I thought CTS-XHP was corrosion resistant. What I can do? Should I worry?

Lo siento Damian, el cuchillo es basura ahora. Será mejor que me lo envíes aquí en California. Incluso pagaré el barco!

[Deadboxhero]

It's not unusual for xhp to be
more reactive.

Most of the chromium is locked up in carbides.

[prndltech]

I whole heartedly agree. Sounds like a Milwaukee button lock utility knife and a 50 pack of blades is in order here…

[Wartstein]

Hello, After taking my Chaparral out of my pocket I realized that it had gray stains (not like rust), there is some humidity where I live and I had to clean it since it had small drops of humidity, I have only been using it for 1 week and this is happening! I thought CTS-XHP was corrosion resistant. What I can do? Should I worry?

No, you don´t have to worry (no offense, but considering all your threads so far I guess at least when it comes to knives you generally should shift your approach massively from "being worried" to "just enjoying" - I mean this as an honest, friendly advice )

"Corrosion resistant" does not mean "totally corrosion proof".

The "stains", or patina or whatever won´t hurt the performance of your Chap at all. Not even red rust spots would.
And since I know that you rather frequently use and sharpen the knife: On the actual EDGE there will be no "corrosion" going on

If you don´t use the knife for a long time and keep it in a more humid environment: It could happen that the edge degrades a bit from "corrosion" and the knife looses sharpness. But some passes on the sharpmaker will perfectly remedy that.

I carried my Chap frequently iwb when going on sweaty runs, used it in rain and mud and so on: No practical problems at all.

If you don´t like the stains:
- You could lightly oil the blade or use apply some other protective layer ( I never do on any Spyderco, so I am not an expert on this)
- Or get a SALT knife. For your line of work a Salt 2 wharncliffe (I´d go SE, but PE should work great too) would be a perfect choice imho

[Jim Malone]

It's corrosion. You should sell your knife and buy something made out of Titanium 6AL-4V to be precise. Ti-6Al-4V (UNS designation R56400), also sometimes called TC4, Ti64,[1] or ASTM Grade 5, is an alpha-beta titanium alloy with a high specific strength and excellent corrosion resistance. It is one of the most commonly used titanium alloys and is applied in a wide range of applications where low density and excellent corrosion resistance are necessary.
I recommend the Microtech Jagdkommando!

[kobold]

I have trouble getting patina on my Maxamet Sage and I live in a swamp. My four XHP blades are still like new. I wouldn't worry either way, patina is your friend and it looks cool.

[damiand]

Hello, After taking my Chaparral out of my pocket I realized that it had gray stains (not like rust), there is some humidity where I live and I had to clean it since it had small drops of humidity, I have only been using it for 1 week and this is happening! I thought CTS-XHP was corrosion resistant. What I can do? Should I worry?

No, you don´t have to worry (no offense, but considering all your threads so far I guess at least when it comes to knives you generally should shift your approach massively from "being worried" to "just enjoying" - I mean this as an honest, friendly advice )

"Corrosion resistant" does not mean "totally corrosion proof".

The "stains", or patina or whatever won´t hurt the performance of your Chap at all. Not even red rust spots would.
And since I know that you rather frequently use and sharpen the knife: On the actual EDGE there will be no "corrosion" going on

If you don´t use the knife for a long time and keep it in a more humid environment: It could happen that the edge degrades a bit from "corrosion" and the knife looses sharpness. But some passes on the sharpmaker will perfectly remedy that.

I carried my Chap frequently iwb when going on sweaty runs, used it in rain and mud and so on: No practical problems at all.

If you don´t like the stains:
- You could lightly oil the blade or use apply some other protective layer ( I never do on any Spyderco, so I am not an expert on this)
- Or get a SALT knife. For your line of work a Salt 2 wharncliffe (I´d go SE, but PE should work great too) would be a perfect choice imho

How come I shouldn't worry about red spots? I've heard red spots are undeniable signs of corrosion. And you have to clean them ASAP. As they will continue to corrode the metal. For a blade that needs to last 10 years, this is vital. Considering the humid conditions, is it reasonable to clean my blade every 12-24 hours? And one more question: what steel are the threads made of? Since every time I wash my knife, I could be rusting the threads inside. Or should I just wash the blade? Are threads corrosion-resistant? All those metallic things that make the mechanism work? Are they corrosion resistant? If they corrode, I think there are no spare parts.