- Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.
Origin of sacrificial anode
First recorded in 1975–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- metallurgy an electropositive metal, such as zinc, that protects a more important electronegative part by corroding when attacked by electrolytic action