Black oxide

In industries where both corrosion resistance and appearance matter, Black Oxide is one of the most widely used surface finishing treatments. Durable, uniform, and cost-effective, this conversion coating enhances the function and appearance of ferrous metals without adding thickness or compromising tight tolerances.
At MYT Machining, we offer professional Black Oxide finishing for steel and stainless steel parts—ideal for applications in tooling, firearms, machinery, and more.
What is Black Oxide?
Black Oxide, also known as blackening or black passivating, is a chemical conversion coating formed by a reaction between the metal surface and an oxidizing solution. The result is a thin layer of magnetite (Fe₃O₄) that gives the part a deep black appearance while improving corrosion resistance, reducing glare, and minimizing light reflection.
Unlike paint or plating, this finish doesn’t build up or flake—it becomes part of the metal surface.
How the Black Oxide Process Works
Cleaning & Degreasing: The part is thoroughly cleaned to remove oils, rust, and contaminants.

Blackening Bath: The component is immersed in a hot alkaline salt solution (typically at 285°F) that converts the surface layer into magnetite.

Rinsing & Sealing: After blackening, parts are rinsed and treated with a protective sealant (oil, wax, or polymer) to enhance corrosion resistance.

The entire process is relatively fast and ideal for parts with intricate geometries or tight tolerances.
Perks of Black Oxide Finishing
At MYT Machining, we apply Black Oxide finishes that combine function and form:
Corrosion Resistance: Enhanced when combined with oil or wax sealants.

Dimensional Stability: Coating is <0.000030″ thick—ideal for tight-tolerance parts.

Reduced Light Glare: Perfect for tools, optics, and tactical gear.

Improved Lubricity: Reduces wear and galling in moving components.

Enhanced Appearance: Sleek matte black aesthetic.

Cost-Efficient: Lower in cost than plating or painting.

Common Applications of Black Oxide
Due to its reliable performance and consistent appearance, Black Oxide is popular across several industries:
Tooling & Dies: To reduce glare and wear.

Firearms & Tactical Gear: Non-reflective, corrosion-resistant coating.

Fasteners & Fittings: Clean finish with lubricity.

Mechanical Components: Gears, bushings, and shafts with wear and corrosion protection.

Decorative Hardware: Handles, brackets, and fixtures.

Why Choose MYT Machining for Black Oxide Finishing?
At MYT Machining, we integrate Black Oxide finishing into our CNC manufacturing process, offering:
Fast Turnaround: Ideal for both prototypes and production batches.

Uniform Finish on Complex Parts

Integrated CNC + Surface Finishing Workflow

Oil, Wax, or Polymer Sealant Options

Post-Finish Inspection for Quality Assurance

Add Strength and Style with Black Oxide – Trust MYT Machining
Whether you need to prevent rust, reduce light reflection, or give your parts a sleek finish, Black Oxide is a smart, affordable solution. At MYT Machining, we deliver precise, consistent results with fast lead times and full finishing support.
Request a quote today to learn how Black Oxide can enhance your next CNC machining project.