What is a desired characteristic of an installation for cathodic protection?

A desired characteristic of an installation for cathodic protection is electronic continuity throughout the system. This characteristic is vital because cathodic protection relies on the flow of electrical current to prevent corrosion on metal surfaces that are in contact with corrosive environments, such as underground storage tanks. For the cathodic protection system to be effective, individual components must be well connected, allowing for the consistent distribution of protective current to the areas needing protection. Without electronic continuity, the system may not function properly, leading to potential weaknesses in corrosion control.

The other options, while they may suggest aspects of a proper installation, do not directly contribute to the fundamental effectiveness of cathodic protection. For instance, although protection from environmental elements might be beneficial for the longevity of the components, it does not address the core requirement of ensuring that electrical current can adequately flow through the system. Similarly, consistent moisture content can be relevant in certain contexts, but again, it is not a fundamental characteristic that directly supports the successful operation of cathodic protection. Extensive surface area exposure does not necessarily enhance the effectiveness of the cathodic protection installation and may even pose challenges if not managed properly.