Not to be confused with the five o’clock shadow one might sport after pulling an all-nighter updating servers, “zinc whiskers” refer to tiny surface crystals or microscopic filaments that form on the surface of steel coated with electroplated (galvanized) zinc to prevent rust.
While this protective coating helps prevent corrosion, the molecular stress from the electroplating process can cause the zinc to grow outward in the form of fine, hair-like structures known as zinc whiskers.
Why Are Zinc Whiskers a Concern in Data Centers?
In data centers, zinc whiskers can form on various infrastructure components, such as cable runway and tray systems, that use zinc-electroplated coatings.
If these zinc whiskers physically detach from their surfaces and enter a data center’s airflow (before ever being detected or impeded by air filters), they can create serious issues, including:
- Short circuits caused by the conductive nature of zinc whiskers.
- Equipment malfunctions or failures when whiskers settle on sensitive electronics.
- Reduced reliability and potential downtime, impacting critical IT operations.
How Can You Prevent Zinc Whiskers?
Proactively addressing zinc whiskers in data centers involves choosing the right infrastructure solutions and implementing best practices. Here are key steps you can take:
1. Use Low-Risk Materials
Avoid materials that rely on electroplated zinc coatings, which are more prone to whisker formation. Instead, opt for:
Powder-coated cable runways: Powder coating provides a robust, non-metallic protective layer that eliminates the risk of zinc whiskers.
- Hot-dip galvanized finishes: Electroplated zinc coatings are thinner and more prone to whisker formation, while hot-dip galvanizing creates a thicker, more stable layer with minimal molecular stress.
- Consider using raised floor tiles that don’t rely on zinc coatings.
2. Regular Inspections and Maintenance
- Schedule routine inspections to identify and address potential zinc whisker issues early.
- Clean cable runways and trays periodically to remove any debris or contamination that might accumulate.
3. Utilize High-Efficiency Air Filtration and Cleaning Systems
- Install high-efficiency particulate air (HEPA) filters to capture zinc whiskers in airflow.
What steps should I take if zinc whiskers are found?
If zinc whiskers are already present, consider these solutions:
Replace affected components: Swap out electroplated components with powder-coated or hot-dip galvanized alternatives.
Refinish existing surfaces: Use a qualified professional to apply a new, zinc-free coating to mitigate future risks.
Install Advanced Filtration Systems: HEPA filters can capture and contain zinc whiskers before they cause damage.
Why Choose CPI’s Cable Runway Solutions?
CPI’s cable runway solutions offer industry-leading protection against zinc whiskers. Key features include:
- Powder-coated options: These provide a smooth, durable finish that prevents whisker formation and supports long-term reliability.
- High load capacity: Designed to handle large cable volumes while maintaining structural integrity.
- Customizable designs: Tailor your cable management system to fit your specific data center requirements.
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