Black Oxide Coating
Black oxide coating is a conversion coating for ferrous materials, stainless steel, copper and copper-based alloys, zinc, powdered metals, and silver solder. This coating is created through a chemical reaction between the metal surface treatment and an oxidizing agent, resulting in a superficial layer of black iron oxide, known as magnetite (Fe3O4). The chemical solution reacts with the material of the workpiece itself to form a coating. The thickness of the film after oxidation treatment is 0.5-1.5 microns, which has no significant impact on the size and accuracy of the part.
The black oxide coating provides mild corrosion resistance, a dark and uniform appearance, and minimizes light reflection.It is typically used in various industries for General protection and decoration of mechanical parts, precision instruments, cylinders, springs, weapons and daily necessities.
Get functional and aesthetic benefits in one with Black Oxide surface finishing.It’s a matte black finish that also adds protection to metals, reducing corrosion and wear over time.Reaction principle: Iron parts are heated in a high concentration of sodium hydroxide solution, and a dense ferroferric oxide protective film is formed under the catalytic action of sodium nitrite. Chemical formula:
- 3Fe+NaNO2+5NaOH→3Na2FeO2+NH3+H2O
- 6Na2FeO2+NaNO2+5H2O—→3(NaFeO2)2+NH3+7NaOH
- Na2FeO2+(NaFeO2)2+2H2O—→Fe3O4+4NaOH
The coating composition is ferroferric oxide, which is non-toxic and will not pollute the environment.
Black Oxide Service For Machined Parts，Sheet Metal Parts and More
At BE-CU Prototype, our Black Oxide Coating service is designed to elevate the quality and performance of your metal components across various industries. We employ advanced techniques and rigorous quality control to ensure a uniform, durable black finish that enhances corrosion resistance, reduces light reflection, and improves lubricity. Capable of coating parts up to 24 x 48 x 28.5 in. tank sizes. Suitable for machined and non-machined components, powdered metals, tooling, and gears. Our state-of-the-art facilities and skilled professionals enable us to handle projects of any scale with precision and efficiency, catering to sectors such as automotive, bike, electronics, and medical devices. By choosing BE-CU Prototype, you benefit from our unwavering commitment to excellence, cost-effective solutions, and a proven track record of delivering superior results. Trust our expertise to provide a professional and comprehensive black oxide coating solution that meets the highest standards and exceeds your expectations.
Black Oxide Industries
Black oxide coatings are used in a wide range of industries and applications, including:
- Automotive: Enhancing the appearance and corrosion resistance of automotive components.
- Aerospace: Providing protection and aesthetic value for aerospace parts and assemblies.
- Manufacturing: Used on various tools and machinery to improve performance and extend service life.
- Military and Defense: Coating components to meet stringent military specifications and improve durability.
- More
Our black oxide coating can be applied to a variety of metals, including ferrous materials, stainless steel, copper, and copper-based alloys. The process involves cleaning, oxidizing, rinsing, and sealing the parts, ensuring a robust and attractive finish. By choosing BE-CU, you are assured of a professional service that not only meets but exceeds industry standards, providing you with components that are ready to perform in the most demanding environments.
Certifications & Quality Machining
- ISO 9001:2015 certified
- Fully compliant with the exacting requirements of our customers
- Compliance in DFARS materials sourcing requirements
- Strict compliance with PPAP and Process
- FMEA for automotive customers
- Skilled in KanBan and CMM Inspection and inventory management systems
- ITAF 16949 certified
Black Oxide Finish Parts & Case Studies
At Be-Cu.com we offer effective products, processes, services and ideas to meet our customer’s needs.Trust us to provide a comprehensive and professional black oxide coating solution tailored to your specific needs.Whether a customer is an original equipment manufacturer (OEM) for the automotive, military, or medical industry, we can meet their Black Oxide Coating needs.View our Black Oxide Finish case studies:
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Prototype CNC Spinning Stainless Steel 316L Outdoor Camping Pot
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PCS Fan Ductwork Sheet Metal Housing
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CNC Turning Wear-Resistant HDPE Fasteners
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Precision Machining Black HDPE IP65 Waterproof Plug
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CNC Machining Large V-belt Pulleys
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CNC Milling Brass Oil-free Rail Slideway Slider
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5 Axis Machining Automation Equipment Precision Parts
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Retainer Cast Aluminum Custom Machining and Finishing
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Turn-milling Compound Machining Mirror Body Shell
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Customized Production Of Non-standard Cast Aluminum Radiator Housing For Industrial Use
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Bicycle Hook Claw Parts By Metal Forging
Types of Black Oxide Coating
Black oxide coating, also known as black oxide or blackening, is a conversion coating process that produces a black finish on metal surfaces. This coating is used to enhance the appearance and performance of metal components. Several types of black oxide coatings are available, each tailored to meet specific application requirements. Here is an overview of the primary types:
1. Traditional Black Oxide
Traditional black oxide coating, also referred to as standard black oxide, is the most common type of black oxide treatment. It involves the application of a chemical solution that creates a thin, black iron oxide layer on the metal surface.Characteristics:
- Appearance: Provides a uniform black finish with a matte or slightly glossy look, depending on the substrate and process.
- Corrosion Resistance: Offers moderate corrosion resistance, suitable for many industrial applications.
- Lubricity: Slightly enhances lubricity, reducing friction on moving parts.
- Applications: Often used in automotive parts, tools, and machinery where aesthetic appeal and basic corrosion resistance are required.
Process: The metal part is cleaned, then immersed in a hot, alkaline-based oxidizing solution. After the desired color and thickness are achieved, the part is sealed with a light oil or other protective treatment.
2. High-Performance Black Oxide
High-performance black oxide coatings are engineered for applications requiring superior corrosion resistance and durability. This type of coating is often used in environments where traditional coatings might fail due to harsh conditions.Characteristics:
- Appearance: Provides a deep, uniform black finish similar to traditional black oxide but with enhanced durability.
- Corrosion Resistance: Significantly improved corrosion resistance compared to traditional black oxide, often meeting or exceeding specific industry standards.
- Lubricity: Better lubricating properties than traditional black oxide, suitable for high-wear applications.
- Applications: Ideal for aerospace components, marine equipment, and other high-stress environments.
Process: The process involves using specialized chemicals and longer immersion times to create a more robust black oxide layer. Additional sealing treatments may be applied to further enhance protection.
3. Oil-Based Black Oxide
Oil-based black oxide coatings incorporate an oil-based sealing treatment as part of the coating process. This type is designed to provide additional lubrication and protection.Characteristics:
- Appearance: Produces a black finish with a slightly oily sheen, which can be adjusted based on the type of oil used.
- Corrosion Resistance: Offers good corrosion resistance, with added protection from the oil layer.
- Lubricity: Provides enhanced lubrication due to the oil component, reducing friction and wear on moving parts.
- Applications: Commonly used in automotive, machinery, and firearms where lubrication is essential.
Process: After the black oxide coating is applied, the part is immersed in or treated with an oil solution. The oil penetrates the coating, adding a layer of lubrication and further protection.
4. Environmental Black Oxide
Environmental black oxide coatings are designed to meet specific environmental and regulatory standards. This type of coating addresses concerns related to hazardous chemicals and environmental impact.Characteristics:
- Appearance: Similar to traditional black oxide, with a uniform black finish.
- Corrosion Resistance: Provides adequate corrosion resistance, tailored to meet specific regulatory requirements.
- Lubricity: Lubrication properties vary depending on the formulation and additional treatments used.
- Applications: Used in industries where environmental regulations are stringent, including aerospace, automotive, and industrial manufacturing.
Process: The environmental black oxide process uses environmentally friendly chemicals and processes, minimizing the use of hazardous materials and reducing waste.
Comparison of Black Oxide Coating Types
| Type | Appearance | Corrosion Resistance | Lubricity | Applications |
|---|---|---|---|---|
| Traditional | Matte to slightly glossy | Moderate | Moderate | Automotive, tools, machinery |
| High-Performance | Deep, uniform black | Superior | High | Aerospace, marine, high-stress parts |
| Oil-Based | Black with oily sheen | Good | Enhanced | Automotive, machinery, firearms |
| Environmental | Uniform black | Adequate | Varies | Industries with environmental regs |
Each type of black oxide coating is engineered to address specific needs and applications. Traditional black oxide is suitable for general use, while high-performance black oxide is designed for more demanding environments. Oil-based coatings offer additional lubrication, and environmental black oxide meets regulatory standards. Understanding the characteristics and applications of each type helps in selecting the most appropriate coating for a given application.
Common Metal Materials Used with Black Oxide Coating
Black oxide coating, a popular finishing technique for metal components, can be applied to a variety of materials. Each material presents unique challenges and benefits when coated, and understanding these can help optimize the performance and appearance of the final product. Here’s a detailed look at the materials commonly used with black oxide coating:
Black Steel Oxide
Carbon Steel: Standard carbon steel is often coated to enhance its appearance and protect it from corrosion. Black oxide coating provides a uniform, black finish that improves both aesthetics and resistance to wear.
Alloy Steel: Alloy steels, which contain additional elements like chromium or molybdenum, can also be blackened. The coating helps to improve corrosion resistance and can be used on high-strength components.
Applications: Automotive parts, industrial machinery, tools, and consumer products.
Steel should be properly cleaned and degreased before coating. Alloy steels might require specific processing conditions to ensure proper adhesion and uniformity of the black oxide layer.
Black Stainless Steel Oxide
Aesthetic Appeal: Black oxide coating can give stainless steel a sleek, black appearance while maintaining its inherent corrosion resistance.
Corrosion Resistance: While stainless steel is already resistant to corrosion, the black oxide coating provides an additional layer of protection and can enhance the visual appeal.
Applications: Architectural elements, aerospace components, medical devices, and high-end consumer products.
Stainless steel requires a more controlled coating process due to its resistance to the black oxide solution. Pre-treatment steps such as abrasive blasting or acid etching might be necessary to ensure proper coating adhesion.
Black Aluminum Oxide
Appearance: The coating imparts a sleek, black finish that enhances the aesthetic appeal of aluminum parts.
Corrosion Resistance: Black oxide on aluminum can improve resistance to corrosion, though aluminum’s natural oxide layer already provides some protection.
Applications: Aerospace components, automotive parts, electronics enclosures, and architectural elements.
Aluminum’s surface can be challenging due to its oxide layer. Proper surface preparation, such as using a non-destructive etching process, is essential to ensure adhesion of the black oxide coating.
Black Copper Oxide
Appearance: Black oxide coating provides a consistent black finish that can help in aesthetic applications and reduce the natural tarnishing of copper.
Corrosion Resistance: While copper has good natural corrosion resistance, the black oxide coating adds an additional layer of protection.
Applications: Electrical components, decorative items, and plumbing fittings.
Copper and its alloys require careful handling during the coating process to prevent discoloration or damage. Surface cleaning and pre-treatment are crucial to achieve a uniform finish.
Black Titanium Oxide
Appearance: The black oxide coating imparts a deep, matte black finish that is often used for aesthetic purposes.
Corrosion Resistance: Titanium’s natural corrosion resistance is complemented by the black oxide coating, which can offer additional protection in specific environments.
Applications: Aerospace components, medical implants, and high-performance sports equipment.
Titanium requires specialized handling during the black oxide coating process. Due to its reactivity with certain chemicals, precise control of process parameters is necessary to achieve optimal results.
Black Iron Oxide And More Metal Materials
Black oxide coating can be effectively applied to a wide range of materials, each benefiting from enhanced aesthetics, improved performance, and added protection. Understanding the specific characteristics and requirements of each material helps ensure optimal results and extends the usefulness of the coated components.
Choose the Best Surface Treatment Process
After browsing a list of Surface Treatment services, select a process based on essential considerations, like production time, cost-effectiveness, part tolerance, durability and applications. High-tolerance CNC milling, turning parts are not recommended to apply secondary metal surface finish, because the treatment may change the sizes of the finished part through removing or adding a small amount of materials.
Other requirements or custom designs, welcome to contact us for a free quote fast or email!