Which material is best used for ductwork in a corrosive environment?

The use of aluminum for ductwork in a corrosive environment is ideal due to its inherent properties that resist corrosion. Aluminum forms a natural oxide layer that protects the metal from further oxidation, making it highly durable in settings where moisture and chemical exposure could be prevalent. This resistance to corrosion is particularly beneficial in environments such as coastal regions or industrial settings where chemicals are present.

Compared to other materials, aluminum's lightweight nature also simplifies installation and reduces the load on building structures. While galvanized steel and galvaneal provide some level of corrosion resistance through zinc coatings, they are not as effective in harsh conditions over time. Steel, in particular, is very prone to rusting when protective coatings are compromised, which can lead to reduced lifespan and efficiency of the duct system.

Thus, when evaluating materials for ductwork in a corrosive environment, aluminum's corrosion resistance and longevity make it the best choice for ensuring the durability and efficiency of HVAC systems.