Bluing is a deep blue. Rust bluing is allowing fe2o3 to form then converting to fe3o4 in boiling water.
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Youre trying to get a layer of fe3o4 magnetite to form on the surface to prevent the underlying steel from oxidizing into rust fe2o3.
Black oxide vs bluing. My wife use to work for a tool company and many of their tools went through a black oxide process and the color was blacker than the blue. Black oxide or its relative cold blueing is partially blocked by the rust the blocking also contributes to why it wont penetrate as well as caustic hot blueing so its less durable. The process was similar to the blue salts process that we are use to.
Thank you very much. Black oxide is a deep black. Blueing vs black oxide gunsmithing troubleshooting.
Well black oxide is the same process as what is commonly referred in firearms trade as bluing. Im wondering out of curiosity more than anything. I will do the hot bluing or the spray on bake.
In the industrial trade it has always been referred to as black oxide since the finish that is achieved is purposely black in appearance. F the actual numbers will very with the formulation of the blueing salts. The caswell stuff looks interesting but i would like to know more about how it oxidizes the metal and converts it to black oxide.
Cold black oxide 1998. Rust bluing and black oxide are after the same thing. Kimber custom is either polished blue or kimproii baked on finish.
Black oxide finish found on guns specified as black oxide is not polished thinner finish shows imperfections in the steel but still the same stuff. The representative said that it gives a different look and that there is no functional difference. Caustic hot blueing is applied at 292 degrees f.
So what is the difference between black oxide and bluing. Im working now in a government company and i dont have any idea whats the better process. Black oxide finish vs bluing black oxide vs bluing black oxidized vs blueing black vs blue gun bluing vs black oxide difference between blued and black oxide firearms gun blue vs black oxide gun bluing vs black oxide.
I work in a tool room as an apprentice and would like a comparison of durability between black oxide done with the cold method and the hot method. Wikipedia says bluing utilizes some kind of black oxide. Forums trap shooting forums shooting related threads.
Black oxide is red oxide rust that has been chemically altered by heat. If you look up slow rust bluing you can see what i am talking about. Bluing is a passivation process in which steel is partially protected against rust and is named after the blue black appearance of the resulting protective finishtrue gun bluing is an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite fe 3 o 4 the black oxide of iron.
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