Galvanized vs Powder-Coated Frames in Humid Facilities

Operators in Incheon and coastal Gyeonggi facilities frequently ask whether frame surface treatment matters for service planning. Our measurements over two years suggest it matters more than rated TH/s when humidity control is absent.

Observed Corrosion Rates

Powder-coated frames in facilities maintaining 60–70% relative humidity showed first corrosion spots at weld seams within 10 months of installation. Galvanized frames under identical conditions typically reached the same stage at 16–18 months. The difference is not dramatic month-to-month, but it compounds: corroded weld seams lose structural integrity faster under vibration load.

Intake Shroud Interaction

Powder coating on intake shrouds tends to chip where dust particles impact at high velocity. Exposed steel beneath the chip becomes a nucleation point for rust that spreads beneath the remaining coating. Galvanized shrouds develop a more uniform patina that does not propagate beneath the surface layer as aggressively.

Practical Recommendation

For facilities without dehumidification, prioritize galvanized frame models when purchasing new hardware, and plan chassis inspections at 8-month intervals rather than the 12-month cycle appropriate for climate-controlled environments. When evaluating used equipment, check shroud inner surfaces — outer appearance often conceals advanced corrosion on the intake side.