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cathodic protection

Definitions

  1. A technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. The simplest method to apply CP is to connect the metal to be protected to a piece of a sacrificial metal, an item that corrodes more readily. The sacrificial metal acts as the anode of the electrochemical cell.

External Sources

http://en.wikipedia.org/wiki/cathodic_protection