Bluing is a passivation process in which steel is partially protected against rust using a black oxide coating. It is named after the blue-black appearance of the resulting protective finish. Bluing involves an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively … See more Various processes are used for the oxidizing process. "Cold" bluing is generally a selenium dioxide based compound that colours steel black, or more often a very dark grey. It is a difficult product to … See more Bluing only works on steel, cast iron, or stainless steel parts for protecting against corrosion because it changes iron into Fe3O4; it does not work on non-ferrous material. Aluminium … See more • Angier, R.H. (1936). Firearm Blueing and Browning. Harrisburg, PA: Stackpole Co. OCLC 3959750. • Fishlock, David (1962). Metal Colouring. … See more Hot caustic bluing Bluing may be applied by immersing steel parts in a solution of potassium nitrate, sodium hydroxide, … See more Bluing is most commonly used by gun manufacturers, gunsmiths, and gun owners to improve the cosmetic appearance of and provide a measure of corrosion resistance to their … See more • Chemical coloring of metals – Process of changing the color of metal surfaces with different chemical solutions • Tempering (metallurgy) • Phosphate conversion coating See more WebHot bluing is a complex process which involves metal parts being placed in a mixture of chemicals (typically potassium nitrate, sodium hydroxide and water) which is then heated to around 150 °C. This causes a black oxide …
Bluing a knife blade? BladeForums.com
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BLUING AND PARKERIZING
WebThe bluing solution applied in hot bluing is a caustic salt mixture of potassium nitrate and sodium hydroxide recognized as “traditional caustic black.”. The caustic salt mixture must be warmed in a metal basket to a … WebSep 2, 2024 · bluing steel: an investiga tion into the thermal and chemical methods of col ouring mild steel 5 work and made suggestions d uring the research process, and Dr Lore T roalen (Nation al Museums ... WebAug 9, 2024 · Bluing is FeO3 or rust with an extra oxygen molecule. This conversion happens as part of the chemical reaction to the rusting agent in the boiling tank. I’m not a chemist by any means, so I’m sure there’s a lot … epic thread