Cathodic Protection

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  • 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)



Impressed Current

  • An "Active system" uses current flow to accomplish the goal

Hybrid Systems

  • Uses both galvanic and active methods

See Also

Useful Links