What is “Zinc Whiskers”, why is Electro-Galvanized (EZ) finishing strictly prohibited in Data Center white spaces, and how to avoid them?

Q: What is “Zinc Whiskers”, why is Electro-Galvanized (EZ) finishing strictly prohibited in Data Center white spaces, and how to avoid them?

What is “Zinc Whiskers”: Zinc Whiskers are microscopic, hair-like filaments of zinc (typically $1$ to $2$ microns in diameter and several millimeters long) that grow from the surface of electro-galvanized (zinc-plated) steel. Over time, internal stresses in the zinc coating cause these conductive filaments to erupt. Electro-galvanized coatings are the primary source of Zinc Whiskers. These are microscopic conductive filaments that grow due to internal stresses in the electro-plating process. In a data center’s high-velocity cooling environment, these whiskers can break off, become airborne, and cause micro-short circuits in sensitive IT equipment (servers, switches). Why is Electro-Galvanized (EZ) finishing strictly prohibited in Data Center white spaces: In a data center environment, these whiskers can break off, become airborne in the cooling system’s airflow, and be sucked into servers. Because they are conductive, they cause: Micro-shorts on motherboards and circuit boards. Intermittent hardware failures that are difficult to diagnose. Total system crashes and data loss. How to avoid them: Specify the right finish: Use Stainless Steel (304 or 316), Powder-Coated finishes, or Hot-Dip Galvanized finishes (though HDG has other drawbacks, as discussed below). Avoid Electro-galvanized (Pre-galvanized) products: These are the primary source of whiskers. Remediation: If they are already present, do not simply vacuum them; specialized professional cleaning and encapsulation are required to prevent further airborne contamination.

Question

What is &#8220;Zinc Whiskers&#8221;, why is Electro-Galvanized (EZ) finishing strictly prohibited in Data Center white spaces, and how to avoid them?

Accepted Answer

What is &#8220;Zinc Whiskers&#8221;:
 	Zinc Whiskers are microscopic, hair-like filaments of zinc (typically $1$ to $2$ microns in diameter and several millimeters long) that grow from the surface of electro-galvanized (zinc-plated) steel. Over time, internal stresses in the zinc coating cause these conductive filaments to erupt.
 	Electro-galvanized coatings are the primary source of Zinc Whiskers. These are microscopic conductive filaments that grow due to internal stresses in the electro-plating process. In a data center&#8217;s high-velocity cooling environment, these whiskers can break off, become airborne, and cause micro-short circuits in sensitive IT equipment (servers, switches).
Why is Electro-Galvanized (EZ) finishing strictly prohibited in Data Center white spaces:
 	In a data center environment, these whiskers can break off, become airborne in the cooling system&#8217;s airflow, and be sucked into servers. Because they are conductive, they cause:
 	Micro-shorts on motherboards and circuit boards.
 	Intermittent hardware failures that are difficult to diagnose.
 	Total system crashes and data loss.
How to avoid them: 
 	Specify the right finish: Use Stainless Steel (304 or 316), Powder-Coated finishes, or Hot-Dip Galvanized finishes (though HDG has other drawbacks, as discussed below).
 	Avoid Electro-galvanized (Pre-galvanized) products: These are the primary source of whiskers.
 	Remediation: If they are already present, do not simply vacuum them; specialized professional cleaning and encapsulation are required to prevent further airborne contamination.