XY-GLOBAL Black Oxide Services

Black anodise finish is one of the most widely used surface treatments in precision manufacturing — not just for its sleek appearance, but for the performance it delivers. Whether you’re designing for aerospace, medical, or consumer electronics, black anodizing offers a compelling blend of durability, dimensional control, and visual uniformity.

Use our specialized black anodizing services to create a uniform matte black surface with a thickness of 0-30μm / 0-1181μin, improving the appearance and corrosion resistance of metal parts.

In this article, we’ll dive into the critical aspects that make black anodise finish a preferred choice in advanced manufacturing.

🎯 What Is Black Anodising?

Black anodising is an electrochemical process that converts the surface of aluminum into a durable, corrosion-resistant, and color-stable oxide layer.
Unlike painting or powder coating, anodising becomes integral to the metal, not just a coating on top.

When black dye is added during the anodising process, the result is a deep, matte or semi-gloss black surface that resists fading, scratching, and wear.

📐 Dimensional Precision & Tolerances

One of the biggest advantages of anodising—especially in high-precision industries—is its minimal impact on dimensional tolerances.

• Coating thickness typically ranges from 5μm to 25μm

• Hard anodising can go up to 50μm, though black color may be harder to achieve consistently at higher thickness

• Tolerance buildup can be managed effectively with pre-anodising machining offset

At XY-Global, we ensure tight tolerance control by factoring in the anodising layer during the CNC machining stage, making this finish ideal for assembly-fit components.

⚙️ Compatible Materials & Ideal Manufacturing Processes

Black anodise is primarily suited for aluminum and its alloys, such as:

• 6061, 6063, 7075, and 5052 aluminum

• Not applicable to steels or most magnesium alloys

It’s commonly applied to parts made via:

• CNC milling and turning

• Die casting

• Extrusion

• Sheet metal fabrication

The surface must be clean, free of oxides or machining oil, and often requires bead blasting or chemical etching before anodising to achieve an even matte texture.

🎨 Color Stability & Surface Appearance

While the black finish is highly desirable for aesthetic and light-blocking purposes, it’s also important to note:

• Uniformity may vary across complex geometries or mixed alloys

• Exposure to UV light or high temperature over time may cause fading unless sealed properly

• The final color can range from deep matte black to satin black, depending on alloy and surface prep

For critical visual parts, we offer controlled color matching and sealing processes to ensure batch consistency.

Performance Benefits

• Corrosion Resistance: Excellent in humid or corrosive environments

• Wear Resistance: Improved surface hardness

• Electrical Insulation: Non-conductive surface layer

• Weight Neutral: No significant mass increase

This makes black anodised parts ideal for enclosures, heatsinks, optical housings, and consumer product casings.

Summary: Why Choose Black Anodise Finish?

📩 Need precision parts with a flawless black anodised finish?
At XY-Global, we offer end-to-end production — from CNC machining to surface treatment — with strict quality control and fast lead times.

Contact us to get a quote or request free DFM feedback for your project.