What do anodes do with current?

Anodes play a critical role in cathodic protection systems by discharging current into the surrounding environment. When an anode is connected to a structure that requires protection, it provides electrons to the cathodic area, effectively reducing corrosion on that structure. This process occurs because the anode willingly gives up electrons, which can then flow to the cathode to counteract the electrochemical reactions that lead to metal deterioration.

In the context of corrosion, the anode's discharge of current is essential for preventing metal loss in the cathodic region. Unlike the other options, which imply different interactions with current (like absorption or storage), the function of discharging current accurately describes the anode's role in sustaining the protective electrical potential and protecting the metal from adverse environmental conditions.