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Subject:
Re: Darkening cast iron?
Response To:
Darkening cast iron? ()

Bill Tindall, E.Tn.
The only permanent durable black will be from creating a surface coating of oxidized iron in the proper oxidation state. In the gun trade it is called "blueing". It is created by immersion of steel into an hot oxidizing material. No idea if it works for cast iron. In the US you could find a gun smith to do it and maybe the same in AU. You can get a good black on steel from simply heating to create this oxide but I don't remember the temperature (it is hot, maybe 600C). But this black is not thick. It is protective to corrosion but not wear.

To get black hardware I use "black bronze". I like the luster and it is durable.

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