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Black Oxide


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Product Description

Black oxide is a cost-effective way to finish your part by Techno Surface finish Services.
Black oxide is a functional surface finish formed by immersing parts into a hot alkaline bath. Typically matte black, this coating reduces glare and enhances corrosion resistance.

Get your next batch of parts black oxide coated or finished with one of our many other options.

What is Black Oxide Coating?

Black oxide, sometimes referred to as blackening, is a low-cost finishing method for adding corrosion resistance, reducing reflection, and enhancing the appearance of parts. Black oxide conversion coatings are created by submerging ferrous parts in a hot alkaline aqueous salt solution bath. Once immersed, a chemical reaction is created on the surface of the parts, which results in a magnetite coating. As a final step, an after-finish of oil, wax, or lacquer is applied for added corrosion resistance.

Applicable on steels, black oxide is a Conversion coating used to improve corrosion resistance and minimize light reflection.
Surface Preparation: As Machined Cleaned and de-greased.
Thickness: 0-30μm
Color: Black
Part Masking: Indicate Masking Requirements in technical Drawing.

Black Oxide Benefits

  • No Dimensional Change
  • Uniform Conversion of existing metal
  • Decorative coating
  • Moving oiled parts
  • Decrease light reflection. 


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