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cathodic protection

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noun
  1. protection of ferrous metals against electrolysis by the attachment of sacrificial anodes.

Origin of cathodic protection

First recorded in 1930–35
Also called electrolytic protection.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cathodic protection

cathodic protection

noun
  1. metallurgy a technique for protecting metal structures, such as steel ships and pipelines, from electrolytic corrosion by making the structure the cathode in a cell, either by applying an electromotive force directly or by putting it into contact with a more electropositive metalSee also sacrificial anode
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012