Question #651d4

1 Answer
Jul 28, 2017

Answer:

Zinc

Explanation:

Zinc is the most common sacrificial anode used to protect iron.
Zinc is less expensive than Magnesium and less reactive. Because Zinc is less reactive it will last longer than the Magnesium rod.

The Magnesium rod works better in protecting the iron but is not used as often as it is more expensive and has a shorter life span.