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        | Title: | Coating, Black Oxide |  
        | Number: | AMS 2485 |  
        | Revision: | J |  
        | Scope: | This specification covers the engineering requirements for producing black oxide coatings on parts and the properties of such coatings.  This coating has been used typically to improve the anti-chafing and anti-friction properties of carbon and low-alloy steel parts, particularly for sliding or bearing surfaces, by providing a finish coating which will retain an oil film, but usage is not limited to such applications. |  
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