[labnetwork] Galvanized steel for air-return surfaces

[Joseph Losby]

Hello Labnetwork,

We are designing an ISO 5 facility using a bay-and-chase layout.  Do you recommend the use of galvanized steel for recirculating air-return surfaces (only), specifically regarding long term risks of zinc oxide shedding or oxidation? All air return is refiltered before entering the cleanroom.

Would powder-coated aluminum be a better option?  Although stainless steel would be used for the ducting between the AHUs and cleanroom HEPA filters (as well as all exhausts), the use of galvanized upstream is mainly a value engineering consideration.

Cheers,
Joe


Joseph Losby, PhD

Manager, qLab Operations

Quantum City, Office of the VPR

joseph.losby at ucalgary.ca
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