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. 2014.
Cite This Source Link To sacrificial anode
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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
Water heaters come with internal sacrificial anode rods to protect against
  rusting.
Ensure that the pump is properly grounded and bonded to reduce the chance of it
  becoming a sacrificial anode.
For sacrificial anode systems, periodic underwater inspections shall be
  performed and observations recorded.
Cathodic protection of the piping shall be provided by a sacrificial anode
  system.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature