News

Powder coatings for the IT industry are functional coating materials specifically designed for information technology products such as computers, communication equipment, server cabinets, and data center infrastructure.

This article systematically introduces the concept, characteristics, functions, and applications of powder coatings for the IT industry, as well as considerations for powder coating selection and solutions to common problems. It focuses particularly on the functions of powder coatings for the IT industry to help readers better understand what IT industry powder coatings are, as well as their characteristics and applications.

What Are Powder Coatings for the IT Industry?

They are a category of functional coating systems based on thermosetting resins, in which conductive fillers are used to construct charge-dissipation pathways. They are specifically designed to meet the electrostatic protection requirements of information technology equipment and the durability requirements of data infrastructure.

Their primary value lies in precisely controlling the conductive network within an insulating resin matrix, keeping the coating surface resistance within the electrostatic dissipative range while withstanding high-frequency mechanical wear and chemical cleaning in data center operating environments.

Characteristics of Powder Coatings in the IT Industry

Powder coatings for the IT industry have the following characteristics:

1. Controllable Surface Resistance: The surface resistance of antistatic coatings is generally controlled within the range of 10⁶–10⁹ Ω, allowing electrostatic charges to dissipate gradually rather than discharge instantaneously, thereby protecting sensitive electronic components.
2. Customizable Electrical Functions: Depending on the application, requirements may include electromagnetic interference attenuation capability or, conversely, high insulation properties to isolate energized components.
3. Mechanical Wear and Scratch Resistance: Coatings must withstand hundreds of insertion and withdrawal cycles of server rails and hot-swapping contacts. Pencil hardness and cross-cut adhesion must meet the required standards to prevent the coating from wearing through and exposing the substrate.
4. Resistance to Chemical Cleaning Agents: Coatings must withstand repeated wiping with isopropyl alcohol and quaternary ammonium disinfectants without softening or fading (ASTM D1308).
5. Low Gloss and Anti-Glare Properties: Data centers prefer low-gloss finishes (approximately 10–30 GU at a 60° angle) and fine-textured surfaces to reduce glare from overhead LED lighting, facilitate the identification of labels and ports, and conceal fingerprints.
6. Corrosion Protection Through Combined Systems: Salt spray resistance requirements are generally 500 hours for indoor cabinets and more than 1.000 hours for outdoor enclosures (ASTM B117). Performance depends on the combined compatibility of the powder coating formulation and pretreatment system, both of which must be specified together.

Functions of Powder Coatings for IT Applications

The functions of powder coatings for IT applications are reflected in the following aspects:

1. Electrical Protection: Electrostatic Dissipation and Electromagnetic Management

This is the core function that distinguishes powder coatings for IT applications from ordinary decorative coatings. Conventional coatings are insulating materials. When static electricity accumulates, electrostatic discharge can damage sensitive electronic components.

Antistatic (ESD) powder coatings construct dissipative pathways through conductive fillers, controlling surface resistance within the range of 10⁶–10⁹ Ω. This allows electrostatic charges to discharge into the grounding circuit at a controlled rate, preventing instantaneous discharge from damaging servers, network equipment, and terminal devices.

Some applications also require coatings with electromagnetic interference attenuation capabilities or, conversely, high insulation properties to isolate energized components.

2. Mechanical Protection: Withstanding High-Frequency Contact Wear

Server rails undergo hundreds of insertion and withdrawal cycles, blade servers require hot-swapping, and cable trays are repeatedly adjusted for cable routing. Coatings must have scratch resistance and abrasion resistance to prevent wear-through to the substrate, which could create starting points for oxidation.

Pencil hardness and cross-cut adhesion are basic verification requirements to ensure that the coating does not wear through and expose the substrate under continuous mechanical contact.

3. Chemical Resistance: Protection Against Maintenance Cleaning Agents

During IT equipment maintenance, surfaces are frequently wiped with isopropyl alcohol and quaternary ammonium disinfectants. Coatings must withstand these chemicals without softening or fading (ASTM D1308), maintaining their appearance and protective functions.

4. Appearance and Identification: Low Glare and Easy Recognition

Data centers prefer low-gloss finishes (approximately 10–30 GU at a 60° angle) and fine-textured surfaces to reduce glare from overhead LED lighting, facilitate the identification of cabinet labels and port markings, and conceal fingerprints and handling marks, maintaining a neat visual environment in equipment rooms.

5. Corrosion Protection: Extending the Service Life of Equipment Enclosures

Even in temperature-controlled equipment rooms, moisture risks still exist. Accidental activation of fire sprinkler systems, condensation caused by power-related incidents, and moisture penetration in coastal facilities can all cause corrosion.

Salt spray resistance requirements are generally 500 hours for indoor cabinets and more than 1.000 hours for outdoor enclosures (ASTM B117). Achieving this performance depends on the coordinated compatibility of the powder coating formulation and pretreatment system, both of which must be specified together.

Specific Applications of Powder Coatings in the IT Industry

Powder coatings in the IT industry are mainly used in the following areas:

1. Data Infrastructure: Cabinets, Racks, and Power Distribution Enclosures

This is the most important application area for powder coatings in the IT industry. Server cabinets, network racks, power distribution cabinet enclosures, cable management trays, and raised access floors are generally made of steel or galvanized steel sheets.

The coatings must provide antistatic dissipation capabilities to protect sensitive electronic components inside the cabinets while withstanding server rail movement, hot-swapping contact, and wiping with maintenance cleaning agents.

Low-gloss and fine-textured finishes help reduce glare from LED lighting in equipment rooms and facilitate label identification.

2. End-User and Office Equipment: Computers, Printers, and Self-Service Terminals

Desktop and laptop computer housings, printers, copiers, routers, ATMs, and self-service terminals require coatings that provide decorative and corrosion protection functions. Some applications also require antistatic or electromagnetic shielding properties.

These devices often have large visible surfaces and are more sensitive to appearance defects such as color differences, orange peel, and particles. Their coatings must also withstand routine cleaning and wiping.

3. Communication and Network Equipment: Base Stations, Routers, and Switches

3G/4G/5G communication equipment, base station enclosures, routers, switches, and other products are commonly used in both indoor and outdoor environments.

Outdoor communication equipment must meet higher salt spray and UV aging requirements (salt spray resistance for outdoor enclosures is generally more than 1.000 hours), while indoor network equipment places greater emphasis on antistatic properties and low-glare appearance.

Some communication equipment requires electromagnetic interference attenuation, which can be achieved through formulations containing conductive fillers.

4. Financial and Self-Service Terminals: ATMs and Self-Service Equipment

Financial equipment such as ATMs, self-service ticket machines, and self-service information terminals generally have steel or aluminum enclosures.

Their coatings must combine antistatic properties, abrasion and scratch resistance (to withstand frequent touching and operation), and resistance to cleaning agents.

The appearance usually requires a low-gloss or fine-textured finish to reduce reflections from lighting in public environments and conceal fingerprints.

How to Select Powder Coatings for the IT Industry

When selecting powder coatings for the IT industry, we may encounter difficulties in determining which products to choose. Based on our industry experience, we recommend paying particular attention to the following aspects when selecting powder coatings for the IT industry.

1. Determine the Electrical Function First: Antistatic, Electromagnetic Shielding, or High Insulation

This is the biggest difference between powder coating selection for IT applications and ordinary architectural powder coatings. The first step must be to clarify the electrical function required of the coating.

Antistatic (ESD) Applications: Server cabinets, network racks, power distribution enclosures, and raised access floors require protection for sensitive components inside the equipment. Antistatic powder coatings with surface resistance controlled within the range of 10⁶–10⁹ Ω should be selected. The key verification point is that this resistance value must remain compliant after curing and repeated cleaning, rather than being assessed only on the initial sample.

Electromagnetic Shielding Applications: Some communication equipment and precision instrument enclosures require coatings that attenuate signals within specific frequency bands (typically 10–25 dB). Formulations containing conductive carbon black, carbon nanotubes, or metal oxide fillers should be selected.

High-Insulation Applications: Areas used to isolate energized components instead require high insulation properties. Antistatic powder coatings must not be used incorrectly in these applications.

2. Verify Mechanical and Chemical Resistance: Match Actual Equipment Operating Conditions

The operating conditions of IT equipment determine that coatings must meet more than just basic rust prevention requirements. Additional tests should be conducted according to the frequency of use.

Mechanical Abrasion Resistance: Server rails and hot-swapping contact areas must withstand hundreds of insertion and withdrawal cycles. Pencil hardness (ASTM D3363) and cross-cut adhesion (ASTM D3359) must meet the required standards to ensure that the coating does not wear through and expose the substrate.

Cleaning Agent Resistance: During maintenance, surfaces are frequently wiped with isopropyl alcohol and quaternary ammonium disinfectants. Coatings must be tested according to ASTM D1308 to verify that they do not soften or fade. When selecting coatings, suppliers should be required to provide wiping test data for the corresponding chemicals rather than simply making general claims of “chemical resistance.”

3. Check Appearance: Determine Low Gloss and Texture According to Equipment Room Visual Requirements

Data centers prefer low-gloss finishes (approximately 10–30 GU at a 60° angle) and fine-textured surfaces to reduce glare from overhead LED lighting, facilitate the identification of labels and ports, and conceal fingerprints and handling marks.

Terminal equipment with large visible surfaces, such as printers and ATM enclosures, is more sensitive to color differences, orange peel, and particles. The same batch of powder coating should be used throughout the entire project. Metallic powders must use a bonding process, and sample panels should be checked under natural light.

4. Specify Coordinated Corrosion Protection: Define the Powder Coating and Pretreatment Together

Salt spray performance is the result of the combined effects of the powder coating formulation and pretreatment system. The quality of zinc phosphate or zirconium-based conversion coatings is often more critical than the powder coating itself.

During selection, requirements should be clearly defined according to the application, and both systems should be specified together:

Indoor Cabinets: Salt spray resistance is generally required to reach 500 hours (ASTM B117).

Outdoor Communication Enclosures: Salt spray resistance must reach more than 1.000 hours, together with additional UV aging verification.

The technical specification should define the powder coating and pretreatment process together rather than purchasing them separately, thereby avoiding premature blistering caused by combining high-quality powder coatings with poor pretreatment.

5. Maintain Strict Application Requirements: Film Thickness and Curing

Film Thickness: The powder coating film thickness for IT equipment enclosures is generally controlled within 60–80 μm. Insufficient thickness provides inadequate protection, while excessive thickness may affect adhesion and assembly precision.

Curing: An oven temperature profiler must be used to measure the actual metal temperature of the workpiece and verify that it reaches the curing temperature range specified for the powder coating. Under-curing simultaneously reduces weather resistance, chemical resistance, and adhesion. It is also a common cause of unstable antistatic performance.

Common Problems with Powder Coatings in the IT Industry and Their Solutions

The most common problems encountered when using powder coatings in the IT industry are mainly reflected in the following aspects. Based on our industry experience, we have proposed corresponding solutions to help effectively resolve the powder coating problems you may encounter.

1. Antistatic Performance Failure: Surface Resistance Drift or Localized Non-Compliance

Problem Symptoms: The surface resistance of the coating exceeds the target range of 10⁶–10⁹ Ω, or significant resistance differences occur between different areas of the same workpiece. After repeated cleaning or long-term use, the resistance increases and the coating loses its charge-dissipation capability.

Possible Causes:

Uneven Dispersion of Conductive Fillers: Conductive carbon black or metal oxide particles agglomerate during powder production, interrupting the local conductive network after curing.

Insufficient Curing: Incomplete resin crosslinking causes conductive fillers to become excessively encapsulated by insulating resin, increasing contact resistance.

Excessive Proportion of Recovered Powder: Conductive fillers are lost or their distribution changes during powder recovery, resulting in resistance drift.

Cleaning Agent Attack: Frequent wiping with solvents such as isopropyl alcohol causes slight swelling of the surface resin layer, obscuring conductive pathways.

Solutions:

Require suppliers to provide resistance test data after curing and cleaning rather than only the initial sample values.

Control the proportion of recovered powder (generally no more than one-quarter of the amount of new powder). The use of recovered powder should be further reduced for antistatic powder coatings.

Use an oven temperature profiler to measure the actual metal temperature of the workpiece and ensure that it reaches the specified curing temperature range.

Use neutral cleaning agents and soft cloths during cleaning. Avoid excessive solvents or prolonged contact between solvents and the coating surface.

2. Insufficient Electromagnetic Shielding Effectiveness

Problem Symptoms: Signal attenuation by the coating within specific frequency bands is lower than the design requirements (typically 10–25 dB), and shielding performance is unstable.

Possible Causes:

Insufficient conductive filler content or an unsuitable filler type prevents the formation of an effective electromagnetic attenuation network.

The coating film is too thin, reducing shielding effectiveness.

Insufficient coating coverage at joints, openings, and other geometric features creates electromagnetic leakage paths.

Solutions:

Select a suitable filler system according to the required frequency band (conductive carbon black, carbon nanotubes, metal oxides, etc.) and require suppliers to provide shielding effectiveness test reports.

Ensure that the film thickness reaches the minimum specified by the formulation. Increase the film thickness appropriately in shielding areas.

Arrange additional powder coating application at joints and openings to avoid coverage blind spots.

3. Mechanical Wear and Substrate Exposure: Coating Wear-Through on Rails and Hot-Swapping Areas

Problem Symptoms: The coating on server rail contact surfaces and the edges of hot-swapping slots wears through to the substrate, resulting in exposed areas or starting points for oxidation.

Possible Causes:

Insufficient pencil hardness or adhesion prevents the coating from withstanding repeated mechanical contact.

Film thickness is too low at sharp edges and corners due to the edge effect, which causes the coating to retract.

Overall film thickness is too low, providing insufficient wear resistance.

Solutions:

Require pencil hardness (ASTM D3363) and cross-cut adhesion (ASTM D3359) to meet the required standards.

Arrange manual powder touch-up on rail contact surfaces and slot edges to ensure sufficient film thickness at sharp edges.

Control dry film thickness within 60–80 μm, using the upper limit for wear-prone areas.

4. Low-Gloss Appearance Defects: Excessive Glare or Uneven Texture

Problem Symptoms: The coating gloss exceeds the target range (more than 30 GU at a 60° angle), resulting in noticeable glare under equipment room LED lighting. Alternatively, fine-textured finishes may be uneven, with localized glossy spots.

Possible Causes:

Uneven temperature distribution in the curing oven results in inconsistent matting effects in different areas.

Excessive variations in film thickness affect the distribution of matting agents.

Differences between powder coating batches or an excessively high proportion of recovered powder.

Solutions:

Conduct nine-point temperature measurements in the curing oven regularly and control the temperature difference within the oven to ±5°C.

Control film thickness uniformity and avoid localized areas that are excessively thick or thin.

Use powder coatings from the same batch throughout the entire project and strictly control the proportion of recovered powder.

5. Corrosion and Blistering: Failure to Meet Salt Spray Requirements

Problem Symptoms: Indoor cabinets or outdoor communication enclosures develop blistering and white spots during salt spray testing or actual use, and the coating separates from the substrate interface.

Possible Causes:

The quality of the pretreatment conversion coating does not meet the required standards or is incompatible with the powder coating formulation.

Insufficient curing results in poor coating density and increases moisture penetration pathways.

Moisture exposure during transportation and storage causes water to accumulate at the coating-substrate interface.

Solutions:

Specify the powder coating and pretreatment system together. Salt spray resistance should reach 500 hours for indoor cabinets and more than 1.000 hours for outdoor enclosures (ASTM B117).

Ensure sufficient curing and use an oven temperature profiler to measure the actual workpiece temperature.

Store profiles above ground and wrap them with moisture-proof film. Inspect the coating before installation. Components showing blistering must not be installed.

Providing High-Quality Powder Coating Solutions for IT Equipment

IT equipment enclosures and metal structural components have high requirements for coating appearance, abrasion resistance, corrosion resistance, and functional performance. Selecting the right powder coating not only enhances product appearance and texture but also improves the surface protection of metal components.

Standard International Group (HK) Limited has more than 20 years of experience in the powder coating industry. We can provide customized powder coating solutions according to the application requirements of server cabinets, computer cases, network equipment, communication equipment, and other IT metal components.

Contact us to obtain powder coating products and customized solutions suitable for your IT equipment!