Basics

Also referred to as "Galvanic Protection" although this is more of a technique OF Cathodic Protection
Allows for Oxidation to be sort of "rerouted" to a remote Sacrificial Anode and thus making the structure into a sort of Electrochemical Cell
This is often done with a Zinc Sacrificial Anode, but technically Galvanization also uses the same mechanism (althouh it isn't often referred as Cathodic Protection in everyday use to provide more clarity)
Most Boats use this for propellors, and other water exposed metals
This is also very common for Pipeline Transport due to the expense of replacement
Rebar is another use case
The Sacrificial Anode can be directly attached (Usually via screws/bolts onto a clear surface), or remote via wires
It is thus easily exchangable
The Sacrificial Anode is gradually spent as it is oxidised, and thus must occasionally be replaced
This does lead to more Lifelong Design when compared to simple galvanization (Need to research how it compares to stainless steel etc)

Methods