Coatings on stainless???

W

Westflorida

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I am just wondering why some manufacturers put coatings on stainless knives? Especially the steels like 440c and S30v. Why would someone need a coating on stainless that is a gents knife? Does it really need it?
 
Stainless simple means 14% of chome in steel. It does not rust resistant, especially for salt water. SOG Navy Seal 2000 has coating even it is AUS-6. Orca which has even more rust resistant X15T.N. has coating too.
Other reason for this - make it less visible. And it looks very cool - very military.
Thanks, Vassili.
 
Hello folks,


Dive with a ATS-34 satin finished knife and you'll know why people coat blades. They looks ugly after a little bit of use, but even under the coating it's protected better. coatings are really necesairy in wet condition knives, since no high-end steel yet is impervious to rust except the non-steels, liquid metal, talonite, stellite....

Even 440C and AUS6 rust when you look at it if they're beadblasted and dunked in salt water or sweat. For people with sweaty pockets, a coated blade is probably best.

greetz and take care, Bart.
 
Originally posted by george tichbourne
Gold TiN coating can be used effectively on a gents folder both for edge holding and appearance.
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I was unaware Titanium Nitride coatings could be done in gold. Do you have a picture of an example? Also, how would a coating increase edge holding?
 
I think Titanium Nitride coatings started gold and were then modified for other applications. The gold is still the most durable of them all IMO.

Tin coated drill bits and cutting tools have been around as long as I can remember, at least going back into the mid/late 80's.

A few companies have made Tin coated pieces, most notably would probably be the SOG multitool.

I had some parts Tin coated on my Colt 1911 a few years back, looked real nice.

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Originally posted by Murnax
...how would a coating increase edge holding?
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On a knife, I doubt it would help at all because the coating typically gets sharpened away to expose the steel.

There have been a few companies that added a ceramic coating in conjuntion with a chisel edge that increased edge life dramatically but were a bear to sharpen. I know Henkels did it with a line of their 5 Star kitchen knives..
 
The coating is much harder than the steel so if you are very careful to sharpen one side of the blade only leaving the TiN to come down to the cutting edge on the other side the harder material will actually form the cutting edge and will reduce wear..it is brittle and will chip so keep that in mind.
 
Wasn't that the idea of the BuckCote series?

What I don't understand is...most coatings don't cover the edge anyway (or cpirtle as said, you end up sharpening it away anyway). So how does it help protect the edge?
 
The edge gets worn away or sharpened, so whatever rust that develops on it gets removed in the process. It's only a problem for the edge if you get it rusty and leave it unused for long enough that it eats through the edge.
 
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