What is an important factor to consider when selecting anodes for a cathodic protection system?

In selecting anodes for a cathodic protection system, current discharge characteristics are a crucial factor. This refers to how effectively the anode can provide the necessary electrical current to protect the metal surface from corrosion. The current output of an anode influences its efficiency and performance in the cathodic protection system.

Anodes must be capable of supplying adequate current over their lifespan based on the corrosion environment and the amount of protection required. Understanding the current discharge characteristics allows for proper sizing of the anodes in relation to both their effectiveness and the specific needs of the structure being protected. This ensures a balanced design for the cathodic protection system that optimizes both performance and longevity.

While cost, availability, susceptibility to corrosion, and size and weight are also important considerations in the selection process, they do not directly impact the fundamental function of the anode in discharging current as effectively as current discharge characteristics do.