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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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