Can Metal Enclosures be offered in different color or finish options to suit specific brand or environmental requirements?

In modern manufacturing, the color and surface treatment of metal casings have broken through the traditional single mode and achieved high customization through the following technologies:

 

 

 

1. Customized Metal Enclosures color solutions for metal shells

2. Adaptability of surface treatment processes to functional requirements

3. Innovative processes under environmental protection and sustainability requirements

 

 

 

Customized color solutions for metal shells

 

1. Anodizing process
Anodizing is an electrochemical treatment method that forms an oxide film on the metal surface, especially widely used in the treatment of aluminum alloy shells. This process can not only generate rich and diverse colors, such as deep black, noble gold, bright red, etc., but also significantly improve the corrosion resistance of the metal shell. In the manufacture of aluminum alloy shells, the surface hardness increases and the wear resistance improves after anodizing, which can better resist the erosion of the external environment and extend the service life of the product.

Take consumer electronics products as an example. Many high-end mobile phones and tablets use gradient anodized colors on their shells. This unique color effect not only enhances the visual appeal of the product, but also gives the product a high-end and fashionable texture. By precisely controlling the parameters in the anodizing process, such as current density, electrolyte composition and temperature, a gradual transition of color can be achieved, making the product appearance more unique and personalized. In addition, some sports watches and smart bracelets also use anodizing technology to provide a variety of color options to meet consumers' needs for personalization.

 

 

2. Spraying technology
Electrostatic powder spraying technology is currently a widely used method in the surface treatment of metal shells. It can cover more than 300 Pantone color cards, and can almost meet the precise matching needs of any brand for VI colors. Compared with traditional liquid spraying, electrostatic powder spraying has many advantages. Its coating has strong adhesion, can be firmly attached to the metal surface, and is not easy to fall off and fade. There is no VOC (volatile organic compound) emission during the electrostatic powder spraying process, which meets environmental protection requirements and is environmentally friendly.

In the automobile manufacturing industry, many automobile brands use electrostatic powder spraying technology to customize unique colors for automobile wheels, body trims and other parts to enhance the personalization and brand recognition of products. In the home appliance industry, the shells of some high-end refrigerators, washing machines and other products also use electrostatic powder spraying technology, which is not only bright and lasting, but also easy to clean and maintain. In addition, in the field of outdoor furniture and architectural decoration, electrostatic powder spraying technology is also widely used to provide metal products with strong weather resistance and rich colors.

3. Electroplating and PVD coating
Electroplating and PVD (physical vapor deposition) coating technology are important means to achieve special surface effects of metal shells. Electroplating technology can deposit a layer of other metals or alloys on the metal surface to obtain effects such as imitation metal brushing and mirror. PVD coating technology evaporates or sputters metals or compounds by physical methods, depositing them on the metal surface to form a thin film, which can achieve unique color effects such as rose gold and gun gray.
These technologies are often used in the manufacture of luxury packaging and medical device shells. In the field of luxury packaging, electroplating and PVD coating technologies can give products a noble and luxurious appearance and enhance the added value of products. For example, some high-end watch and jewelry packaging boxes use electroplated or PVD-coated metal shells, and the surface presents a delicate metallic luster and unique color, which complements the high-end positioning of the product. In the field of medical equipment, these technologies can not only provide beautiful appearance, but also meet the requirements of medical equipment for surface finish and corrosion resistance. For example, the shells of some surgical instruments and medical equipment use electroplating or PVD coating technology, which has a smooth and easy-to-clean surface and can effectively prevent bacterial growth and corrosion.

 

 

Adaptability of surface treatment processes to functional requirements

 

1. Outdoor industrial equipment
Outdoor industrial equipment is exposed to complex and changeable natural environments for a long time, and faces erosion from multiple harsh factors such as ultraviolet rays, salt spray, and wind and sand. Therefore, the process combination of sandblasting + fluorocarbon spraying has become an ideal choice.

Sandblasting is the basic step in the customization of metal shells. It uses high-speed sprayed sand to hit the metal surface to remove impurities, oxide scale, etc., and at the same time form a uniform rough texture on the surface. This not only increases the adhesion of subsequent coatings to the metal surface, but also improves the mechanical strength of the shell to a certain extent.

Fluorocarbon spraying is the key protective layer. Fluorocarbon coatings have excellent UV resistance and can effectively resist long-term exposure to ultraviolet rays in the sun to prevent coating aging, fading and powdering. Its salt spray corrosion resistance is also very outstanding. It can be used for a long time in environments with high salt spray concentrations such as coastal areas to protect the metal shell from corrosion. For example, in outdoor equipment in the petrochemical industry, such as oil tanks, pipeline valves, etc., metal shells using sandblasting + fluorocarbon spraying technology can operate stably in harsh industrial environments, reduce maintenance costs and replacement frequency, and extend the service life of equipment.

 

2. Medical instruments
Medical instruments have extremely high requirements for hygiene and safety, and the process combination of antibacterial coating + mirror polishing came into being.

Antibacterial coating is a special coating developed specifically for the medical field. It can release antibacterial substances, inhibit the growth and reproduction of microorganisms such as bacteria and viruses, and effectively prevent microorganisms from adhering to and breeding on the surface of the metal shell. This is crucial to prevent cross-infection and ensure the safety of the medical environment.
Mirror polishing gives the metal shell a smooth mirror-like surface effect. This smooth surface is not only beautiful, but more importantly, it is easy to clean and can effectively reduce the hiding places for dirt and bacteria. In practical applications, such as medical equipment in operating rooms and medical monitoring equipment, metal shells with antibacterial coating + mirror polishing technology are convenient for medical staff to carry out daily cleaning and disinfection, reducing the risk of infection and improving the safety and reliability of medical instruments.

 

3. Consumer electronics
As items that people frequently touch in their daily lives, consumer electronics products have increasingly higher requirements for appearance and touch. The process combination of micro-arc oxidation + nano-oleophobic layer meets this demand.
Micro-arc oxidation is a new type of surface treatment technology. It forms a ceramic oxide film on the metal surface with high hardness, strong wear resistance and good insulation performance. This oxide film can also present different colors and textures by controlling process parameters, providing more possibilities for the appearance design of consumer electronic products.

 

The nano-oleophobic layer further enhances the product experience. It can effectively prevent fingerprints, oil stains and other stains from adhering to the surface of the metal shell, so that the product always maintains a clean and tidy appearance. At the same time, the nano-oleophobic layer gives the shell a delicate touch, allowing users to feel comfortable and smooth when holding and operating the product. For example, consumer electronic products such as smartphones and tablets use metal shells with micro-arc oxidation + nano-oleophobic layer technology. Not only is the appearance stylish, but it is also not easy to leave fingerprints and stains in daily use, which improves the product's quality and user satisfaction.

 

 

Innovative processes under environmental protection and sustainability requirements

 

1. Chromium-free passivation technology

Chromium-free passivation technology, by adopting other environmentally friendly chemicals or treatment methods, can also form a dense passivation film on the metal surface without using hexavalent chromium, thereby achieving an anti-corrosion effect.

 

2. Application of water-based paint

Traditional paints usually contain a large amount of organic solvents, which will evaporate into the air during the use of the paint, causing environmental pollution and potential harm to human health. In order to cope with this problem, water-based paints have gradually become a new choice for metal shell surface treatment.
Water-based paints use water as a solvent, which greatly reduces the use of organic solvents. This not only reduces the emission of volatile organic compounds (VOCs), improves the working environment and air quality, but also makes water-based paints widely used in some fields with extremely high environmental protection requirements. For example, in the manufacture of food-grade equipment housings, such as catering machinery, food processing equipment, etc., the application of water-based paints is particularly important. Since food-grade equipment is in direct contact with food, it has extremely high requirements for safety and hygiene. Water-based paint does not contain organic solvents that are harmful to the human body and meets food-grade safety standards, which can ensure that the equipment will not cause pollution to food during use.

 

3. Recyclable surface treatment
With the improvement of awareness of resource recycling, the recyclability of metal casings has become an important consideration. Traditional surface treatment processes often make it difficult to separate the metal substrate from the coating, resulting in a low metal recovery rate during the recycling process, while also increasing the recycling cost.

Recyclable surface treatment technology uses thermal stripping coating technology to separate the metal substrate from the coating by heating, thereby achieving efficient metal recovery. This technology not only improves the recycling rate of metals, reduces resource waste, but also reduces dependence on new metal resources, which is in line with the concept of sustainable development.