![sacrificial anode sacrificial anode](https://www.tekportal.net/wp-content/uploads/2018/11/sacrificial-anode.jpg)
noun
- Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.
noun
- metallurgy an electropositive metal, such as zinc, that protects a more important electronegative part by corroding when attacked by electrolytic action