Black Oxide

MIL-DTL-13924, Class 1

Black oxidation is a chemical treatment that leads to the formation of a black iron oxide on the surface of metal parts. This treatment is mainly applied to ferrous materials, such as stainless steel. It is sometimes referred to as chemical burnishing, blackening or "black oxide". 

The positive effects of black oxidation are numerous, including: it gives parts a pleasing appearance to parts, covering them in a deep black that can have a glossy or matte finish; it increases corrosion resistance, especially when the black oxide is then impregnated with oil or wax. In some cases, the treatment will contribute to better lubrication of the part.

Main uses

  • This process is commonly used in the automotive, recreational product, industrial and military sectors.

Types of treatable metals

  • Steel
  • Stainless steel

Advantages and benefits

  • Increasing corrosion resistance and the service life of parts and contributing to better lubrication of the part.

Project using this process