sacrificial anode

noun

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

British Dictionary definitions for sacrificial anode

sacrificial anode

noun

metallurgy an electropositive metal, such as zinc, that protects a more important electronegative part by corroding when attacked by electrolytic action

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