Knife coating?

R

rachet197

Joined
Jul 16, 2011
Messages
145
Rust protective and water resistant coating any help?
I've heard of duracoat, anyone know of a light manual on using it?


THX in advance
 
No exactly. The primary purpose for a knife coating is to limit reflected light when stealth is a priority. It's referred to as light discipline in military applications. The coatings also provide somewhat of a reduction in friction when cutting material. Other companies use it because it is a marketing tool. For the most part, coatings are porous, if they weren't they could have the opposite effect and trap moisture between the steel and the coating accelerating rust formation. Do a search, this has been discussed at length and has been clarified by some knife manufaturers. As for duracoat and cerakote, google will probably provide some cursory information that you are looking for.
 
rachet197 said:
What brand do you like of oil?
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You can also use paste wax. It stays in place and resists water. Johnsons' paste wax or any of the carnauba car waxes will work. Bees wax is good, but is more of a pain to apply.
 
marcinek said:
Generic mineral oil from your local drugstore....it's in with the laxatives.
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+1 on that...works great and has the added advantage of being edible...so if you slice up an apple, you don't have to wonder what kind of toxins you might be adding to your food.
 
RevDevil said:
For the most part, coatings are porous, if they weren't they could have the opposite effect and trap moisture between the steel and the coating accelerating rust formation. Do a search, this has been discussed at length and has been clarified by some knife manufaturers. As for duracoat and cerakote, google will probably provide some cursory information that you are looking for.
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very true, spyderco (or i should say one of the spyderco guys on their website forum, i cannot remember his name, mentioned in a post)has mentioned that they believe some maybe all(the post wasn't all that clear on detailing) coatings can accelerate corrosion potentially, i guess depending on the conditions involved when applied?

although assuming when the coating was applied with no moisture and depending on the coating, something like the cold steel teflon coating should have some corrosion resistance until the knife is used and the coating worn away and your back to bare steel again.

now what makes this interesting is on benchmades site they claim 2 of their 3 coatings have corrosion resistance properties....cut and pasted below...

"BK1 ® COATING: BK1 coating is a matte black coating that provides excellent corrosion protection, which exceeds the ASTM-117 spec for saltwater while possessing higher scratch resistance.

BT2 ® COATING: A proprietary blade coating that is Xylan ® based to provide excellent corrosion resistance which exceeds the ASTM-117 spec for saltwater and increases overall surface lubricity."
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that seems pretty clear to me that 2 of the 3 benchmade coatings are there for corrosion resistance and whatever tactical non-reflecting property they offer, although that isn't mentioned in the descriptions up above.


so their public statement (from the f.a.q on their website) sure muddies the issue a bit, for me anyways.....
 
not sure how Cerakote could aid in moisture retention and rusting. When I coat I degrease to the point there is NOTHING on the blade, then heat and do it again. After the degrease then its off to the media cabinet for a little 120 grit aluminum oxide to be sure there is nothing on the item and to give it a slight etch for adhesion. After that its straight to the spray booth to receive a nice coat of Cerakote. Then off to the oven where it bakes for 2 hours at 250 degrees.

Cerakote does not "accelerate' in rusting or corrosion but eliminates it.
 
Some coatings like DLC can still allow rust formation though it seems to slow it down some. But others stop corrosion and even when they wear off seem to stop corrosion unless the coating and some of the metal is also removed. Putting a coat of paint on steel has always stopped rust in my part of the world (which happens to have a lot of humidity and some salty air).

I would be curious to see all these coated blades that are rusting away.
 
Mineral oil, especially if there is a chance you would use your knife for food processing or cooking. Same food rule applies for blade coatings in my book, and is one of several reasons I find blade coatings to be a liability. As a side note, if stealthiness is a priority then you (or anyone else) could put a vinegar patina on the blade, followed by mineral oil for protection and this should be more than enough to suppress any reflection from your knife that might be seen by game or hostiles.
 
kycolonel said:
Mineral oil, especially if there is a chance you would use your knife for food processing or cooking. Same food rule applies for blade coatings in my book, and is one of several reasons I find blade coatings to be a liability. As a side note, if stealthiness is a priority then you (or anyone else) could put a vinegar patina on the blade, followed by mineral oil for protection and this should be more than enough to suppress any reflection from your knife that might be seen by game or hostiles.
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+1...Mineral oil is what I use since I use my knives for everything from wood processing to cooking. I wore the factory coating off of my ESEE 6 in no time and since it's a hard user and sometimes I am out in wet conditions for days so I stripped it and did a full vinegar patina on it. Doesn't reflect light, protects and keeps the rust off until I get home and can clean and oil it. It's a win win

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