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Jun 14th, 2026
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Joined: Oct 2006
Posts: 100
Sidelock
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OP
Sidelock
Joined: Oct 2006
Posts: 100 |
What might be causing "brown spots" on silver nitride finished Merkel.....oxidation of some sort??
How might I prevent from ocurring?
We're only responsible for the effort, not the outcome.
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Joined: Aug 2005
Posts: 1,583
Sidelock
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Sidelock
Joined: Aug 2005
Posts: 1,583 |
S-John,
I have asked the same type of question around the internet for over 5 years because of similar issues (greying/discoloration on a Citori) without getting a satisfactory answer. The discoloration seems to come from acidic hand sweat. I use Flitz to polish it up and it works well.
It seems that the lack of good info stems from "Silver Nitride" being a marketing name of a hardening/coloring process that most probably does include any Silver Nitride (highly reactive and unstable).
I've heard that Silver Nitriding is:
*Plasma nitriding
*Plasma enhanced chemical vapor deposition
*Electoless nickel
The plasma coatings are PFM to me, so I quit looking around.
Edit: Gil, PFM is a high technology acronym; Pure ----ing Magic.
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Joined: Feb 2003
Posts: 1,681 Likes: 27
Sidelock
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Sidelock
Joined: Feb 2003
Posts: 1,681 Likes: 27 |
Yeti: PFM? Kinda like BFD? :-)
[IMG]
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Joined: Feb 2004
Posts: 13,883 Likes: 21
Sidelock
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Sidelock
Joined: Feb 2004
Posts: 13,883 Likes: 21 |
I've noted the same thing. Mfrs say "silver nitride" for anything that looks silver it seems. IMO, the Citori graying that I've seen on the bottom edges of the frame are where the clearcoat and/or silver metal (whatever it is) has worn thru at various levels and usually you're seeing bare steel in the worst spots with some graying from corrosion. Machinery's Handbook has a description of "silver nitride" and one method on how it's done.
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Joined: Aug 2005
Posts: 1,583
Sidelock
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Sidelock
Joined: Aug 2005
Posts: 1,583 |
Thanks Chuck. I just found the 27th Ed for 14.50...I've seen that you and some of the other metal guys use it as a reference. One of these days/weeks/years I'll get to my experimental stripping of the Citori triggerguard. One of the internet guys said he stripped it with 30% hydrogen peroxide. I've got the electoless nickel stripper and that was plan A, but that was 14 months ago.
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Joined: Feb 2004
Posts: 13,883 Likes: 21
Sidelock
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Sidelock
Joined: Feb 2004
Posts: 13,883 Likes: 21 |
Don't rush into anything. I try not to. 14 mos seems like a reasonable time to plan a project.
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