Black Oxide:
Black Oxide is a conversion coating formed by a chemical reaction with the iron in the metal to form an integral protective surface. A black oxide conversion coating is applied to ferrous alloys when oxidizing salts react with the iron to form magnetite (Fe3O4), the black oxide of iron. Though standard Black Oxide is set up for steel, it can be done on other substrates including stainless steel, copper, and brass among others.
Typically, black oxide has a post dip of either oil or wax to improve the corrosion protection of the finish. Black oxide offers a nice, matte black appearance at a low cost.
Black Oxide Chemical Conversion Features:
- Corrosion Resistance (when oiled/waxed)
- Appearance
- Cost Competitive
- Dimensional Stability
What are the governing specifications that cover Black Oxide Chemical Conversion?
- AMS 2485
- MIL C 13924
- MIL DTL 13924
Bead Blasting:
Bead blasting is a process in which small spheres of glass or other abrasive material are blasted at high pressure against a surface. Bead blasting is commonly used as a finishing step in manufacturing metal parts or to remove rust, paint, or other debris from metal surfaces. It can also be used to texturize plastic or glass surfaces.
The force of the blast removes debris or contaminants from the surface of the workpiece and smooths or polishes the surface.
Bead blasting can create a variety of different finishes, from a matte finish to a highly polished finish. The type of finish achieved depends on the size and type of abrasive particles used, as well as the pressure of the air stream.