Black Oxide

[a coating conversion that causes virtually no dimensional change]

MIL-DTL-13924D Classes:

  • Class 1
  •  Class 2
  • Class 3
  • Class 4

Call A.M. Metal Finishing at 407-843-0182 for all your finishing needs.

Black Oxide Services in Orlando

Black oxide is a coating conversion that causes virtually no dimensional change. It is a uniform continuous conversion of the existing metal to a black form of rust. Used primarily on components where light tolerances are paramount – mostly as a decorative coating. Only very limited corrosion protection under mildly corrosive conditions. Should be kept oiled. For moving parts that cannot tolerate the dimensional change of a more corrosion-resistant finish, black oxide coating should normally be given a supplementary treatment (i.e. oil displacement per MIL-C-16173 Grade 3 or protective treatments of MIL-C-16173). For decorative applications and can be used to decrease light reflection.


Black Oxide Benefits

  • no dimensional change
  • uniform conversion of existing metal
  • decorative coating
  • moving oiled parts
  • decrease light reflection

For more information concerning Black Oxide conversion services in Orlando, contact us.

Black Oxide Capabilities A.M. Metal Finishing

Class 1: Alkaline oxidizing. For wrought iron, cast and malleable irons, common carbon and low alloy steels.

Class 2: Alkaline oxidizing. Use on certain corrosion-resistant steel alloys tempered at less than 900°F.

Class 3: Fused salt oxidizing. For corrosion-resistant steel alloys which are tempered at 900°F (482°) or higher.

Class 4: Alkaline oxidizing. For other corrosion-resistant steel alloys.

Fun Fact

Black oxide finish is used on surgical instruments in light-intensive environments to reduce eye fatigue.

Did You Know?

Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance and to minimize light reflection. To achieve maximal corrosion resistance the black oxide must be impregnated with oil or wax. One of its advantages over other coatings is its minimal buildup.

A.M. Metal Finishing offers all four classes of Black Oxide and meets MIL-DTL-13924D standards. Contact us at 407-843-0182 if you have parts which require black oxide conversion.

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7594 Chancellor Drive, Orlando, Florida 32809


Toll Free 1-888-663-6136

Fax 407-849-1724

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Monday - Friday
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