View Single Post
Old 03-21-2020, 07:51 PM
BMCM's Avatar
BMCM BMCM is offline
US Veteran
Join Date: Jun 2012
Location: SW Mississippi
Posts: 1,201
Likes: 1,846
Liked 4,882 Times in 894 Posts

Minor touch up to a flat blued or black oxided finish can be done with one of Caswell Plating's black oxide products.

I've had great results getting stuff nitrided by H&M Metal processing. As I recall it was $100 to run a slide through the Isonite QPQ treatment process. But that was a while back.

BTW... Isonite, melonite, tenifer, nitride, et. al. Are all basically the same and not a coating but a form or case hardening. The black finish is merely a side effect. It's not something that is applied but is a result of the part being submerged in a bath of molten cyanide salts though which nitrogen is bubbled. Even on old treated parts where the black color has worn off a bit the case hardened layer of the steel surface remains

Because they don't make a .46
Reply With Quote
The Following 3 Users Like Post: