Process of applying finish to un-plated carbon steel putters or wedges. The resulting finish is a deep blue color and resists rust. Bluing is also the liquid used in the process itself.
The process of applying heat and / or chemicals to metal in order to achieve a color oxidation.
The controlled process of oxidation on a rifle. It controlled by using an oil which seals the metal. The result is a blue colored tint and many also be done with black or brown.
The blue or black finish of the metal parts of a gun. The process is actually one of controlled rusting and brushing and is usually created with an acid bath. Bluing minimizes light reflection, gives a "finish" to the bare metal, and protects somewhat against rust.
The chemical treatment to color ferrous metal parts in various shades of blue or black.
A chemical process of blackening steel. Has only limited ability to protect from corrosion and is sensitive to wear by abrasion.
An oxidation (rusting) process normally applied to firearm metal parts. It is controlled by applying oil (usually heated) which mixes with the nitrates used in the process. The oil prevents further rusting by sealing the metal. This gives the metal a blue/black colour. It is also possible to "brown" or "black" guns by a similar process.
The formation of a thin film of oxide on polished steel to improve its appearance and protect its surface.
Subjecting the scale-free surface of a ferrous alloy to the action of air, steam, or other agents at a suitable temperature, thus forming a thin blue film of oxide and improving the appearance and resistance to corrosion. This term is ordinarily applied to sheet, strip, or finished parts. It is used also to denote the heating of springs after fabrication in order to improve their properties.
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 finish. True gun bluing is an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite (Fe3O4), the black oxide of iron, which occupies the same volume as normal iron. Black oxide provides minimal protection against corrosion, unless also treated with a water-displacing oil to reduce wetting and galvanic action.