Black Oxide thickness

ASM logo-The Materials Information Society :: Black Oxide
Finishing :: Manganese
Coating :: Zinc Phosphate
Coating :: Passivation

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The thickness of coating is almost negligible at about 0.000030 inch. Black Oxide coating has an ability to absorb a subsequent coating of oil or other corrosion inhibitor. Of the many options open to any component designer, black coating has served its purpose extremely well over the years and will continue to be important to the metal working industry.

Present-day propriety black oxide baths not only contain an alkaline base with oxidizing agents, but activators to increase the blackening rate at lower temperatures and to produce more uniform results. Black oxide baths now contain additives that increase corrosion and abrasion resistance.

A black oxide finish offers a combination of properties that cannot be provided any other way. This conversion coating does not change the dimensional, physical or mechanical properties of the surface treated. The finish is inexpensive and easy to apply. It has an excellent appearance and is abrasion resistant. Corrosion resistance is satisfactory for a wide variety of applications.

  • Improved corrosion protection
  • Improved abrasion resistance
  • No dimensional changes
  • Improved lubricity
  • Anti-Galling
  • Reduces light glare and reflection
  • Finish does not chip, flake, or peel
  • Enhanced appearance
  • No welding fumes

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  • Up to 120 inches in length
  • Solvent Base Oil
  • Water Emulsified Oil
  • Steel, Stainless Steel, Brass, Bronze
  • Competitive Prices
  • 24 hour service
  • Reliable quality

pop-upFor most customers, we are able to complete any reasonable job in 24 hours. We operate on FIFO (First In, First Out) continuous process and can process most jobs the same day. Customers will be notified if we cannot run or rush the same day. There is an expedite charge for rush orders.

Processes Performed Per Specification

Black Oxide: MIL-DTL-13924D (MIL-C-13924C)
Class: 1, 2, 3, & 4

Phosphate: MIL-DTL-16232G (DOD-P-16232F)
Type: M (Manganese)
Type: Z (Zinc)

Phosphate: TT-C-490
Type: I
Type: V

Passivate: AMS 2700 REV B, AMS-QQ-P-35, ASTM-A967-01 & QQ-P-35

Black Oxide on Brass or Copper: MIL-F-495

Quality System Conformation

ISO 9002
ANSI/NCSL Z540-1-1994

Approvals Held for Military Specifications

MIL-DTL-13924D (MIL-C-13924C)
AMS 2485H
MIL-DTL16232G (DOD-P-16232F)

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