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sacrificial anode
noun
- Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.
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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Word History and Origins
Origin of sacrificial anode1
First recorded in 1975–80
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Example Sentences
After that brick — known as a sacrificial anode — meets its untimely demise, another is bolted in its place.
From Los Angeles Times
Don�t ignore a scratch and unwittingly let your aluminum outboard motor become a sacrificial anode.
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