CNC Machining Black Oxide Coating Parts
2.Process: Precision machining followed by chemical conversion forming a thin oxide layer.
3.Feature: No dimensional change, making it suitable for tight tolerance components.
4.Surface: Matte black appearance with reduced glare and improved aesthetics.
5.Protection: Oil or wax post-treatment enhances corrosion resistance.
6.Advantage: Cost-effective compared to plating or coating methods.
7.Quality: Inspection ensures color uniformity and surface consistency.
CNC Machining Black Oxide Coating Parts
Shenzhen Ruiyihang Technology Co., Ltd. has over 15 years of engineering experience and advanced production skills that allow us to make unique CNC Machining Black Oxide Coating Parts with great black oxide finishes. Our engineer-led method guarantees clear communication, quick turn-around (samples can be ready in as little as 3 days for simple parts), and ±0.02 mm accuracy in range. We offer 100% unique OEM/ODM production and a thorough quality review process. The parts we send you are accurate in terms of size and have a uniform matte black finish that makes them more resistant to corrosion.
What Makes Our Black Oxide Coating Parts Different?
It is important that the parts you use are perfect for the job. That's why we put tech first and making things second.
Our team looks over your drawings very carefully. Before work starts, we look for problems that might happen. You'll save time and money this way.
It's not just about how black oxide looks. It has to do with function. The sealing doesn't really make your parts thicker. Your strict limits stay the same. Every time, your parts fit right.
We first make your parts to meet your needs. After that, the black oxide process is used. A uniform black layer is made by the chemical reaction process. There is no growth. No changes in dimensions.
Technical Specifications
| Item | Description |
|---|---|
| Material | Carbon Steel, Alloy Steel, or per customer request |
| Color | Black (Matte Black Finish) |
| Process | CNC Milling / CNC Turning / Black Oxide Coating |
| Surface Finish | Black Oxide (Conversion Coating) |
| Tolerance | ±0.02 mm (±0.01 mm for critical features) or per drawing |
| Surface Roughness | Ra 0.8–1.6 μm (before coating) |
| Coating Thickness | Negligible (no measurable buildup) |
| Salt Spray Resistance | ≥12–24 hours (with oil treatment, higher upon request) |
| Feature | No dimensional change, improved corrosion resistance, uniform black appearance, cost-effective finishing |
| Size | Per Customer Drawing |
| Drawing Format | PDF / DWG / STEP / IGS |
| Production Volume | Prototype to Mass Production |
| Inspection | 100% Inspection / Sampling Inspection |
Why Black Oxide Works for Precision Components?
Our product offer advantages you won't get from other finishing methods.
The coating forms through chemical conversion. Your part's surface transforms into a black oxide layer. There's no added material stacking on top. This means your precision dimensions remain unchanged.
Compare this to plating or painting. Those methods add thickness. They can interfere with tight-fitting assemblies. Black oxide doesn't create that problem.
You also get a matte black appearance. The surface absorbs light instead of reflecting it. This reduces glare in optical applications and improves aesthetics in visible components.
When we add oil or wax treatment after coating, your parts gain enhanced corrosion protection. This combination works well for indoor environments and controlled conditions.
Our Manufacturing Process
We handle everything in-house, from initial machining to final coating.
Step 1: Engineering Review
You send us your drawings. Our engineers analyze them within hours. We discuss material selection, tolerances, and surface requirements directly with you.
Step 2: Precision CNC Machining
We use cutting edge CNC milling and turning tools to make your parts. We work with all kinds of shapes and sizes, as well as special features and tight standards.
Step 3: Black Oxide Treatment
The parts go through our controlled black oxide process after they have been machined. To make sure that the effects are always the same, we keep an eye on the chemical concentration, temperature, and soaking time.
Step 4: Post-Treatment
We put on an oil or wax covering to protect the surface and make it less likely to rust.
Step 5: Quality Inspection
Dimension and surface quality checks are done on every batch. Colour symmetry and coating accuracy are checked before the package is sent out.
Applications Across Industries
Our CNC Machining Black Oxide Coating Parts serve diverse industrial needs:
- Mechanical components requiring non-reflective surfaces
- Fasteners and hardware for assembly applications
- Automotive parts needing corrosion protection
- Industrial equipment components
- Tool and die components
- Structural parts with aesthetic requirements
The versatility of black oxide makes it suitable for both functional and visible applications.
Quality You Can Count On
Quality control runs through every stage of production.
We source certified raw materials. Our machining follows international dimensional tolerance standards. Black oxide treatment is performed under controlled conditions with regular testing.
For food-contact applications, we comply with FDA requirements. Salt spray testing reports are available upon request.
If quality issues arise within the same month, we arrange remanufacturing within one week and cover all shipping costs. That's our commitment to you.
Fast Turnaround for Your Projects
Time matters in manufacturing. We know you can't wait weeks for parts.
Our typical sample production takes about 7 days. For simpler components, we deliver in as fast as 3 days.
We quote quickly after reviewing your drawings. Our engineers work efficiently because they understand both design and manufacturing.
For small-batch orders, we offer optimized international shipping. Door-to-door delivery makes logistics simple for you.
FAQ
Q: What is black oxide coating for CNC machined parts?
Black oxide chemically converts steel into a black surface, boosting corrosion resistance and attractiveness.
Q: Can black oxide be applied after CNC machining?
Machining, turning, and drilling CNC items can be black oxide coated without impacting accuracy or dimensions.
Q: What materials are suitable for black oxide coating?
Mostly used for carbon, alloy, and certain stainless steel components.
Q: What are black oxide coating benefits?
Corrosion resistance, light reflection reduction, appearance, and dimensional precision are provided.
Partner With Engineering Expertise
Finding a parts maker is not enough to discover the proper manufacturer.
Your partner must comprehend technological needs. A clear, fast communicator. A team that prevents costly mistakes.
We established our business on engineering support. Average team experience exceeds 15 years. We've managed difficult tasks since 2008.
We meet your volume needs with prototype samples or entire production runs. Every project receives targeted attention with our 100% bespoke production.
We assist you from material selection to final inspection.
Contact Us
Ready to discuss your CNC Machining Black Oxide Coating Parts requirements? Contact us at bill@bldmachining.com with your drawings and specifications.
