Black oxide is a chemical conversion coating that creates a thin black layer on the surface of steel. Unlike paint or powder coating, it does not build up a thick coating; it chemically converts the metal surface into a black iron oxide layer.
* What Black Oxide Does
Provides an attractive black appearance.
Reduces light reflection and glare.
Offers mild corrosion resistance when combined with oil or wax.
Maintains dimensional accuracy because the coating is very thin.
Improves lubricity and wear characteristics.
How the Process Works
* Typical process sequence:
Cleaning/degreasing
Water rinse
Acid activation (if needed)
Black oxide treatment
Water rinse
Oil, wax, or sealant application
Drying
- The coating is usually formed by immersing steel parts in a hot alkaline oxidizing solution.
