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Bluing (steel) Bluing, sometimes spelled as blueing, 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 ...
For double-barreled guns that use one shotgun barrel and one rifle barrel, see combination gun. Double action revolver: A revolver whose trigger performs two actions, firing the round, and cocking the hammer. Double rifle: A rifle that has two barrels, usually of the same caliber. Like shotguns, they are configured either in over-and-under or ...
Phosphate conversion coating. Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates to improve corrosion resistance or lubrication or as a foundation for subsequent coatings or painting. [1][2][3] It is one of the most common types of conversion ...
Cosmoline was developed by Houghton International in the 1860s or 1870s as a pharmaceutical product. The original Cosmoline was an ointment and was used for many different cosmetic and medical purposes, including to promote hair growth. [3] It was kept in homes to disinfect wounds and was used by veterinarians to treat cuts, abrasions, bruises ...
Eco pickled surface ( EPS) is a process applied to hot rolled sheet steel to remove all surface oxides ( mill scale) and clean the steel surface. Steel which has undergone the EPS process acquires a high degree of resistance to subsequent development of surface oxide (rust), so long as it does not come into direct contact with moisture.
Pickling is a metal surface treatment used to remove impurities, such as stains, inorganic contaminants, and rust or scale from ferrous metals, copper, precious metals and aluminum alloys. [1] A solution called pickle liquor, which usually contains acid, is used to remove the surface impurities. It is commonly used to descale or clean steel in ...
Rust converter. Rust converters are chemical solutions or primers that can be applied directly to an iron or iron alloy surface to convert iron oxides (rust) into a protective chemical barrier. These compounds interact with iron oxides, especially iron (III) oxide, converting them into an adherent black layer (black oxide) that is more ...
The AK-74 was designed by А. D. Kryakushin's group under the designer supervision of M. T. Kalashnikov. Based on the competition results, this assault rifle was included in the inventory in 1974 as part of the 5.45-mm small arms complex. The cartridge used in the AK-74 weighs 1.5 times less as compared with the 7.62-mm cartridge.