sacrificial anode

sacrificial anode

noun
Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.

Origin:
1975–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sacrificial anode is always a great word to know.
So is scrub. Does it mean:
to remove impurities from a gas by chemical means, as sulfur dioxide from smokestack gas or carbon dioxide from exhaled air in life-support packs
a salt of hydrofluoric acid consisting of fluorine, as sodium fluoride, NaF, or a compound containing fluorine, as methyl fluoride, CH3F
Collins
World English Dictionary
sacrificial anode
 
n
metallurgy an electropositive metal, such as zinc, that protects a more important electronegative part by corroding when attacked by electrolytic action

Collins English Dictionary - Complete & Unabridged 10th Edition
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