In Sacrificial protection of Iron the active metal that is most commonly used is:
Nickel
Tungsten
Zinc
Copper
Zinc being more active and having lesser reduction potential is used in sacrificial protection of Iron substances.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin and Copper etc. are reduced by using
Why copper and aluminum are used over tungsten, iron, nickel to make fuses?