What type of devices should be used to attach aluminum air terminals?

The use of stainless steel devices for attaching aluminum air terminals is preferred due to its resistance to corrosion and its compatibility with aluminum. Stainless steel provides strength and stability, ensuring that the connection remains secure over time, even in harsh environmental conditions. This metal's ability to withstand different weather elements contributes to the longevity of the lightning protection system, reducing maintenance requirements.

Utilizing stainless steel also minimizes the risk of galvanic corrosion, which can occur when dissimilar metals come into contact with one another, particularly in the presence of moisture. This risk is not a concern when using stainless steel with aluminum, as they have compatible corrosion resistance properties.

In contrast, plastic would not provide the strength needed for a secure attachment, and it is susceptible to degradation over time due to UV exposure and environmental factors. Brass could react with aluminum, leading to corrosion issues. Copper, while a good conductor, can initiate galvanic corrosion when paired with aluminum unless proper isolation methods are implemented. Thus, stainless steel stands out as the most suitable choice for ensuring a durable and effective connection for aluminum air terminals.