Which Is More Corrosion-Resistant: Copper or Aluminum Coils?
Corrosion resistance is a make-or-break factor for HVAC coils, and copper outperforms aluminum in challenging environments. Copper forms a dense natural oxide film that defends against salt spray, industrial waste gas, and hard water scaling. Near chemical plants, copper-coil AC corrosion is just 1/5 that of aluminum.
Aluminum relies on a thin oxide layer for protection, which works in...