Surface Finishing Service
In addition to precision manufacturing services, JUNYU also offers a diverse range of surface finishing options, providing clients with a one-stop solution from design to final product. Our integrated services help accelerate project timelines while ensuring consistent and superior product quality.
We have a professional surface finishing team capable of handling orders of any quantity, processing parts made from various materials and structures, with strict quality control at every step. Ready to enhance your product’s appearance and performance? Contact us now for a customized quote.
Surface Finishing Options
Anodizing
Anodizing is a surface treatment process widely applied to metals such as aluminum, magnesium, titanium, and their alloys. It involves forming an oxide film on the metal surface through an electrochemical method. In this process, the surface of aluminum or aluminum alloys is transformed into a strong and durable oxide layer. This oxide film provides protective, decorative, corrosion-resistant, and other functional properties.
During anodizing, the metal (e.g., aluminum) is used as the anode and immersed in an electrolyte solution. When an electric current is applied, oxidation occurs at the anode, resulting in the formation of a dense oxide film—such as aluminum oxide—on the metal surface. This layer significantly alters the surface properties of the material, enabling coloring, enhanced corrosion resistance, improved wear resistance and hardness, and effective protection of the underlying metal.
Chrome & Galvanized
Chrome plating is a process in which a layer of chromium is deposited onto the surface of a base metal through electroplating or other methods such as chemical plating or physical vapor deposition. The resulting chromium layer offers excellent wear resistance and a distinctive metallic luster.
Zinc plating or galvanized is a surface treatment technology that deposits a layer of zinc onto the surface of metals, alloys, or other materials through electroplating, hot-dip galvanizing, or other techniques. It is used to achieve corrosion protection, decorative finishes, or other functional enhancements.
Black oxide
Black oxide is a common metal surface treatment process that forms a black oxide film on the surface of a metal through a chemical reaction, with the primary component being Fe₃O₄ (magnetite). This film provides rust protection, aesthetic , and a certain degree of wear resistance. It also offers light reflection reduction and lubricity without significantly altering the dimensions of the part.
TIN &TICN
TiN (Titanium Nitride) is a golden-colored ceramic coating. It is formed by depositing a layer of titanium nitride on the surface of a workpiece through processes such as vacuum evaporation or sputtering, where titanium atoms react with nitrogen gas. Common deposition methods include magnetron sputtering and arc ion plating.
TiCN is a modified ceramic coating based on TiN (Titanium Nitride), formed by introducing carbon into the coating structure. It is typically applied using PVD (Physical Vapor Deposition) techniques, such as magnetron sputtering or arc ion plating.
DLC&TIALN
DLC (Diamond-Like Carbon) is an amorphous carbon film that possesses properties and a structure similar to that of diamond. It is typically deposited onto the surface of a workpiece using PVD (Physical Vapor Deposition) or PECVD (Plasma-Enhanced Chemical Vapor Deposition) techniques. DLC combines the high hardness of diamond with the low friction coefficient of graphite.
TiAlN (Titanium Aluminum Nitride) is a commonly used high-performance PVD ceramic coating composed of titanium, aluminum, and nitrogen. By incorporating aluminum into the TiN or TiCN matrix, this coating significantly enhances thermal resistance and oxidation stability, making it particularly suitable for high-temperature and high-speed machining environments.
Coating Properties Comparison Table
| Coating Type | Main Composition | Color | Hardness (HV) | Heat Resistance | Wear Resistance | Oxidation Resistance | Typical Applications |
| TiN | Titanium Nitride | Golden | ~2000 | ~500°C | Good | Fair | General metal cutting, decorative coatings |
| TiCN | Titanium Carbonitride | Blue-gray / Violet-gray | 3000+ | ~400°C | Very good | Good | High-speed cutting, dry machining |
| DLC | Diamond-Like Carbon | Black / Dark gray | 2000-5000 | ~350°C | Excellent | Fair | Precision parts, medical tools, decorative use |
| TiAlN | Titanium Aluminum Nitride | Gray-black / Dark violet-gray | 2500-3300 | 500-900°C | Very good | Excellent | High-temperature cutting, mold machining |
Other Surface Finishing Methods
Other surface finishing methods include sandblasting, polishing, shot blasting, wire drawing, passivation, and PVD coating. We offer a comprehensive range of surface treatment solutions. To determine the most suitable process for your parts and application needs, feel free to contact us. Our engineering team will provide you with the optimal solution.
JUNYU Surface Finishes, Methods Comparison Table
| Surface Finishing Method | Applicable Materials | Available Colors |
| Anodizing | Aluminum / Aluminum Alloys / Other Metals | Grass green, red, black, etc. |
| Chrome Plating / Galvanizing | Steel / Stainless Steel / Alloy Steel | Bright silver |
| Powder Coating | All Metals | Black, blue, yellow, red, etc. |
| Polishing | All Metals and Plastics | No fixed color / Natural metal finish |
| Sandblasting | All Metals | Black, blue, yellow, red, etc. |
| PVD | Metals (especially stainless steel, titanium alloys) | Gold, silver, gray, multicolor, etc. |
| Wire Drawing | Metals (commonly stainless steel, aluminum) | Metallic brushed texture / Natural color |
| Passivation | Stainless Steel / Aluminum / Copper | No color change (natural silvery white) |
| DLC | Metals (e.g., stainless steel, carbon steel, titanium alloys) | Black / Dark gray |
| TiN | Metals (mainly steel, cemented carbide) | Golden yellow |
| TiCN | Metals (mainly steel, cemented carbide) | Blue-gray / Violet-gray |
| TiAlN | Metals (mainly HSS and carbide) | Gray-black / Dark violet |
We offer other surface finishing options, feel free to get a quote！
JUNYU Surface Finishes
Why Choose JUNYU for Surface Finishing Services？
Why Choose Our Surface Finishing Services?
Choosing our surface finishing solutions means benefiting from our core strengths in technical expertise, stable quality, customized service, and cost efficiency. Our advantages are demonstrated in the following key areas:
1. Advanced Technology to Meet Diverse Needs
Comprehensive Process Coverage
We offer a wide range of surface finishing technologies, including PVD coatings, electroplating, anodizing, sandblasting, and passivation. Our capabilities apply to metals, plastics, ceramics, and more, addressing applications such as rust removal, surface strengthening, wear resistance, and decorative effects.
High-Precision Parameter Control
Equipped with automated systems such as CNC shot peening machines and magnetron sputtering equipment, we accurately control critical parameters like particle velocity, coating thickness, and temperature. For example, our PVD coating thickness tolerance is within ±1μm, ensuring coating uniformity and adhesion performance.
2. Robust Quality Assurance System
Full-Process Quality Inspection
From surface pretreatment to final coating, we implement strict quality control using salt spray testing, hardness measurements, coating thickness gauges, and more. Our zinc coatings, for instance, pass 500-hour salt spray tests without corrosion.
Environmentally Compliant Materials
We use eco-friendly processes such as non-chromium passivation and water-based coatings, in compliance with RoHS, ISO, and other international standards—ensuring safety, sustainability, and suitability for export-oriented products.
3. Customized Service & Delivery Efficiency
Tailored Process Solutions
We develop customized finishing plans based on industry-specific requirements—such as applying DLC diamond-like coatings to molds for aerospace or electronics applications, increasing wear resistance by 3–5 times.
Rapid Turnaround Times
With standardized production lines, we support high-volume orders and compress lead times for complex processes (e.g., multi-layer electroplating) to 70% of the industry average—ideal for urgent projects.
4. Cost Optimization & Long-Term Value
Exceptional Cost Performance
Through scaled production, we reduce unit costs. Our pricing is 10–15% lower than competitors for equivalent processes, while achieving longer coating life—for example, ceramic thermal spray coatings last up to 2 years longer than standard coatings.
Technical Support & After-Sales Service
We provide complimentary sample testing, process consultation, and failure analysis of coatings. Our technical team assists in optimizing your product design, helping reduce long-term maintenance costs.
Overview of Surface Finishing
What is Surface Finishing?
Surface finishing refers to a set of process technologies that modify the surface of materials through mechanical, chemical, electrochemical, or physical methods, aiming to achieve purposes such as cleaning, protection, decoration, or functional enhancement.
It’s like “dressing up” or “beautifying” a material—giving an otherwise ordinary surface improved performance or appearance.
Benefits of Surface Finishing
Improved Corrosion Resistance
Enhanced Wear Resistance and Hardness
Improved Appearance and Texture
Better Processing Compatibility
Enhanced Electrical or Thermal Properties
Functional Surface Protection
Reduced Maintenance and Replacement Costs
Cleaning the parts
Surface Finishing FAQ
1.Are there any material limitations for your services?
No, we support a wide range of materials and manufacturing processes without restriction.
2.Why do machined parts require surface finishing?
To improve appearance, strengthen the material surface, and enhance key properties like durability and corrosion resistance.
3.Can you help if I don’t know how to choose a surface finish?
Yes, we offer professional guidance and design support to help you select the best finishing method for your parts.
4.If I am not satisfied with the surface finishing result, do you offer after-sales support?
Yes, we provide comprehensive after-sales support. If you are not satisfied with the surface finishing result, please contact us promptly. We will assess the situation and offer appropriate solutions such as rework, redo, or other reasonable remedies to ensure your satisfaction and meet quality standards.
