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NPFC - MIL-DTL-13924

COATING, OXIDE, BLACK, FOR FERROUS METALS

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Organization: NPFC
Publication Date: 12 September 2018
Status: active
Page Count: 11
scope:

This specification covers black oxide coatings applied to ferrous metals (carbon, low alloy, and corrosion resistant steels, and wrought iron). Black oxide coatings, with or without a supplementary preservative treatment (see 3.11), may be used where a black surface is required. Only very limited corrosion protection, under mildly corrosive conditions, is obtained as a result of black oxide coating (see 6.1). Black coatings are included in this specification with limitations as noted in 1.2. Unless contraindicated by contract, chrome-free finishes should be used in place of finishes containing hexavalent chromium, provided all performance criteria herein has been met and documented as OQE.

Classification. Black oxide coatings covered by this specification should be of the following classes as specified (see 6.2 and 6.3.2).

Class 1 Alkaline oxidizing process (for wrought iron, cast and malleable irons, and plain carbon or low alloy steels).

Class 2 Alkaline chromate oxidizing process (for use on certain corrosion resistant steel alloys which are tempered at less than 900°F (482°C)).

Class 3 Fused salt oxidizing process (for corrosion resistant steel alloys which are tempered at 900°F (482°C) or higher).

Class 4 Alkaline oxidizing process (for other corrosion resistant steel alloys).

intended Use:

The black oxide coatings covered by this specification are military unique. Black oxide coatings are used on munition cases and gun barrels. These coatings are particularly suited for moving parts... View More

Document History

MIL-DTL-13924
September 12, 2018
COATING, OXIDE, BLACK, FOR FERROUS METALS
This specification covers black oxide coatings applied to ferrous metals (carbon, low alloy, and corrosion resistant steels, and wrought iron). Black oxide coatings, with or without a supplementary...
December 22, 2003
COATING, OXIDE, BLACK, FOR FERROUS METALS
A description is not available for this item.
March 18, 1999
COATING, OXIDE, BLACK, FOR FERROUS METALS
The black oxide coatings covered by this specification are military unique. Black oxide coatings are used on munition cases and gun barrels. These coatings are particularly suited for moving parts...
September 30, 1987
COATING, OXIDE, BLACK, FOR FERROUS METALS
A description is not available for this item.
June 9, 1980
COATING, OXIDE, BLACK, FOR FERROUS METALS
Black oxide coatings are particularly suited for moving parts that cannot tolerate the dimensional build-up of a more corrosion-resistant finish. They are not recommended on parts going into...
September 4, 1968
COATING, OXIDE, BLACK, FOR FERROUS METALS
A description is not available for this item.
March 30, 1966
COATING, OXIDE, BLACK, FOR FERROUS METALS
This specification covers black oxide coatings applied to ferrous metals (wrought iron; carbon, low alloy, and corrosion resistant steels) . Black oxide coatings, with or without a supplementary...
December 26, 1956
COATING, OXIDE, BLACK, FOR FERROUS METALS
This specification covers black oxide coatings applied to ferrous metals (wrought iron; carbon, low alloy, and corrosion resistant steels). Black oxide coatings, with or without a supplementary...
December 23, 1954
COATING, OXIDE, BLACK, FOR FERROUS METALS
Intended use and method of application. – The information contained herein relative to the method of application of finish is for information only and does not in any way relieve the contractor of...

References

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