MIL-C-13924; AMS 2485

Black Oxide is a surface treatment which forms an oxide coating on the surface of steels and stainless steels which is black. It's main application is to change the color of the steel without risk of chipping or peeling where a coating of oil is permissible. Black oxide has no corrosion protective properties on it's own, but it does make a superior surface for the application of oil to keep the surface from rusting. Common uses for black oxide are tooling, small screws for consumer goods and engine parts.

The hot black oxide treatent is a better black oxide coating in both function and look; however, when the part does not fit into the processing bath, the cold process is a good alternative.

The most popular specifications which our process meets is MIL-C-13924 Class 1 and 4 and AMS 2485.

Frequently Asked Questions

Does Black Oxide have a thickness or buildup? No. Black oxide is a surface treatment only and does not have thickness or buildup.

Is it possible to black oxide other metals then steel and stainless steel? Yes. There is a black oxide treatment for copper and copper alloys.