Anodizing
Xtproto is committed to providing customers with the highest quality anodizing technology. We are proud to offer robust, safe, and high-quality finishing to provide maximum protection and ensure a longer lifespan for your metal parts.
Custom Anodizing Services
We offer custom anodizing solutions to enhance the corrosion resistance, wear resistance, and surface texture of metal parts. Whether it’s hard anodizing for high-strength applications or general anodizing to meet precision dimensional requirements, we can match the appropriate process to the part’s structure, operating environment, and performance needs. We support Type I (chromic acid), Type II (sulfuric acid), and Type III (hard anodizing) and offer a variety of color options. Whether it’s one-piece anodizing prototyping or large-scale stable production, we can customize exclusive process routes and color schemes according to the product’s application. Relying on a rigorous QC inspection system and meticulous process control, we ensure that film thickness, color consistency, and surface properties meet design requirements, providing stable and reliable surface protection for your anodized parts while helping to shorten lead times and reduce overall costs.
Types of Anodizing We Offer
Type I - Chromic Acid Anodizing
Type II - Sulfuric Acid Anodizing
Type III - Hardcoat Anodizing
What Is Anodizing and How Does It Work?
Anodizing is a metal surface treatment process based on electrolytic passivation. In an electrolytic bath (typically a sulfuric acid solution) powered by direct current (DC), the metal workpiece acts as the anode. An oxidation reaction occurs on its surface, growing a uniform, dense protective oxide layer that is tightly integrated with the substrate. This process is widely applied across various non-ferrous metal components.
By precisely controlling the thickness of the oxide film, anodizing provides metals with exceptional corrosion resistance, wear resistance, and a rich variety of aesthetic finishes. Additionally, the anodizing process significantly enhances lubricant retention on the metal surface and effectively reduces wear on threaded and drive components over long-term use—making it a core surface treatment solution for boosting overall component performance and service life.
Anodizing Color Difference Control
Relying on experience and visual inspection is often the cause of color variation and batch-to-batch inconsistency in anodized components. Replacing traditional manual evaluation, we fully adopt spectrophotometers for digital color management, establishing a rigorous color control system to restore standard color charts (Pantone / RAL) and strictly keeping color tolerance within ΔE < 1.0.For multi-component assemblies and long-term recurring orders in our anodizing services, we not only optimize same-bath processing but also implement 100% data logging and locking for core process parameters, including bath concentration, current density, temperature, and dyeing time. From anodized rapid prototypes to full-scale mass production, we eliminate joint color mismatches and visual interruptions after assembly. Combined with micron-level sealing control, we ensure superior color uniformity across all anodized products at delivery while imparting exceptional UV and weather resistance—providing a standardized benchmark for your brand’s aesthetic quality.
Precision Anodizing Services for Thickness Control and Masking
The growth of the anodic film directly impacts fitting dimensions, while localized protection for complex geometries and internal cavities remains a core technical challenge in surface treatment. Through accurate pre-processing dimensional compensation calculations and electrochemical parameter adjustments, we strictly maintain film thickness uniformity for both soft anodize and hard anodize within strict tolerance ranges, ensuring that precision mating surfaces, such as threads and bearing seats, fit perfectly after processing without the need for secondary machining.
For complex internal cavities and deep blind holes, our anodizing services utilize custom concealed racking and refined masking technology. Through selective non-anodized masking protection, we effectively eliminate visible rack marks on cosmetic surfaces while safeguarding conductive contacts and precision interfaces from bath erosion.
Engineering Expertise in Anodizing DFM
Our experienced engineering team provides comprehensive Design for Manufacturability (DFM) evaluations specifically tailored for the anodizing process. Before production begins, our engineers review your technical drawings to analyze critical tolerance margins, thread clearances, and wall-thickness uniformity, ensuring proper dimension compensation for anodizing. We optimize racking points, drain-hole placements for deep cavities, and design custom fixtures and anodize masking tooling to protect conductive zones and precision interfaces. By bridging the gap between mechanical design and electrochemical surface finishing, our engineering team mitigates quality risks early.
Advanced Anodizing Facility
Our state-of-the-art anodizing facility is equipped with fully automated and semi-automatic anodizing lines designed for high-consistency surface finishing. Featuring precision-controlled anodizing equipment, our workshop incorporates real-time monitoring systems for bath temperature, current density, and chemical concentration, ensuring stable coating performance across every processing batch. To handle complex structural geometries, our anodizing workshop utilizes specialized chillers for hard anodizing, ultrasonic cleaning units, and dedicated pulse-rectifier power supplies that guarantee uniform film growth. Backed by advanced wastewater treatment systems and strict environmental compliance, our modern anodizing workshop delivers surface treatment solutions tailored to stringent industrial standards.
Materials We Commonly Use Through Anodizing Process
Only metal parts can be processed using anodizing. Below are the anodized materials we process.
Aluminum Anodizing
- 6000 Series(6061, 6063, 6082)
- 7000 Series(7075, 7050)
- 5000 Series(5052, 5083)
- 2000 Series(2024, 2014)
- Cast Aluminum(A356, A380, ADC12)
Titanium Anodizing
- Commercially Pure Titanium(Grade 1, Grade 2)
- Alpha-Beta Titanium Alloys(Grade 5 / Ti-6Al-4V)
- Beta Titanium Alloys(Grade 19, Grade 20)
- Medical Grade Titanium(Ti-6Al-4V ELI / Grade 23)
- Aerospace Titanium Alloys(Ti-6242, Ti-1023)
Magnesium Anodizing
- AZ Series Magnesium(AZ91D, AZ31B, AZ80A)
- AM Series Magnesium(AM60B, AM50A)
- ZK Series Magnesium(ZK60A, ZK30)
- WE Series Magnesium(WE43, WE54)
- Cast Magnesium Alloys(AS41, AE44)
- Wrought Magnesium Alloys(ZE41, ELEKTRON 21)
Niobium Anodizing
- Commercial Pure Niobium(R04200, R04210)
- Reactor Grade Niobium(R04251, R04261)
- Niobium-Titanium Alloys(Nb-Ti 47%, Nb-Ti 50%)
- Niobium-Zirconium Alloys(Nb-1Zr)
- Niobium C103 Alloy(Nb-10Hf-1Ti)
- Superconducting Grade Niobium(RRR Grade)
Tantalum Anodizing
- Unalloyed Tantalum(R05200, R05400)
- Tantalum-Tungsten Alloys(Ta-2.5W, Ta-10W)
- Capacitor Grade Tantalum(High Purity Powder/Wire)
- Tantalum-Niobium Alloys(Ta-40Nb)
- Medical Grade Tantalum(ASTM F560)
- Corrosion-Resistant Tantalum(Ta-0.15Pd)
Zirconium Anodizing
- Unalloyed Zirconium(R60702 / Zircadyne 702)
- Zirconium-Niobium Alloys(R60705 / Zircadyne 705)
- Nuclear Grade Zircaloy-2(R60802)
- Nuclear Grade Zircaloy-4(R60804)
- Medical Grade Zirconium(Oxinium / Zr-2.5Nb)
- Chemical Grade Zirconium(R60700)
Coating Thickness & Precision Tolerance Control
We offer anodizing services with thicknesses ranging from 5 μm to 50 μm+:
Designed for high-precision threaded connections and tight-fitting components, providing essential surface protection with virtually zero impact on tolerances.
Standard Films (10 – 25 μm): Provide the optimal balance of corrosion resistance and aesthetic appeal for general industrial parts.
Provide the optimal balance of corrosion resistance and aesthetic appeal for general industrial parts.
Form a dense, highly wear-resistant protective layer engineered for extreme friction and harsh environments.
Because anodizing builds approximately 50% inward into the substrate and 50% outward on the surface (adding roughly 50% of the total film thickness per side), our anodizing engineering team pre-calculates these dimensional changes before processing to ensure your finished parts perfectly match critical drawing tolerances.
Color Anodizing Services
We provide flexible anodized color customization services for OEM customers. Unlike fixed color chart limitations, we can match colors according to part design requirements and achieve diverse surface effects through process control. Anodizing typically adds approximately 3-5 days to the production cycle; for faster delivery, please order anodized parts separately.
Precision Anodizing Process Control & Standards
We specialize in various electrochemical anodizing processes and can achieve precise coating thickness control from 5–50μm according to your drawing requirements. From surface preparation, polishing, and acid cleaning to anodizing parameter adjustment and final sealing, every process step is strictly controlled to ensure consistent oxide thickness, color uniformity, and dimensional stability. Through refined anodized process management, we effectively reduce risks such as thin-wall deformation and surface defects on complex parts, providing reliable surface protection and electrical insulation performance for your components.We strictly follow multiple international industry and engineering specifications to ensure anodizing quality meets customer requirements:
- Military & Industry Specifications: MIL-A-8625, AMS 2471, AMS 2472
- Corporate & Internal Specifications: EPS-103-02, AMPS 020-0135, 9904102
Anodize Sealing Quality and Durability Testing
To verify long-term performance under demanding operational environments, we implement rigorous quality inspection for all anodizing process outputs. Every anodizing production batch undergoes standardized testing—including salt spray corrosion testing (ASTM B117), Taber wear resistance evaluation for hard anodized coatings, and acid-dissolution anodize sealing quality tests (ISO 3210 / ASTM B680)—to ensure optimal corrosion prevention and surface hardness. By continuously monitoring bath chemistry and anodizing pore-sealing integrity, we guarantee that every treated anodizing surface maintains high electrical insulation, exceptional color stability, and long-lasting protection.
Your Trusted Anodizing Supplier
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FAQ
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Contact our metal anodizing experts
Want to know which anodizing process is best suited for your application and get pricing information? Feel free to contact us.