Does finish make a differance?

H

HKG36

Joined
Oct 14, 2003
Messages
129
Does the finish on a blade make a difference in corrosion resistance? Out of Black, Satin, and Stonewash which is the most corrosion resistant, if any? Which is the least, if any?
 
Absolutely. The rougher the finish, the more surface area exposed to moisture, plus the irregularities in rougher finishes give the moisture somewhere to collect.
The stonewash blades I've owned had very finely polished finishes great for resisting stains.
Satin-depends on the grit.
Black is usually a coating, so it depends. Generally, a coated blade is entirely protected except for the edge bevel, and would be the best until the coating wears. Lots of different coatings out there, though, so there is no all-encompassing answer for that one.
 
Most

Black coating
gunblue
high mirror polish

satin high grit (These three will vary according to grit)
stonewash
beadblast


Least
 
Plus the rougher the surface the more places water can get "trapped" in the pits.

High mirror polish resists pretty well. It also depends on the steel you use. I've had O1 steel, with a 800 grit satin finish, rust in the space of 10 minutes. Just little discolourations when I brought a knife into the shower (I had just ground it from stock and polished :P had to admire it)
 
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