What is the advisable practice regarding the mounting of bare copper and aluminum materials?

Mounting bare copper on aluminum surfaces is generally discouraged due to the potential for galvanic corrosion, which occurs when two dissimilar metals are in contact in the presence of an electrolyte. In this scenario, aluminum can act as the anode and corrode more quickly than it would alone, leading to a deterioration of the aluminum over time. This corrosion can undermine the structural and electrical integrity of the lightning protection system or other electrical installations.

By avoiding the mounting of bare copper on aluminum, the risk of this corrosion is minimized, ensuring that both materials maintain their quality and functionality over their expected lifespan. This practice is particularly important in environments where moisture or electrolytic conditions may be present, as these can accelerate the corrosion process. Maintaining the integrity of both materials helps ensure a reliable and durable installation that adheres to best practices in lightning protection systems.