Cathodic protection is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode.

What cathodic means?

1. A negatively charged electrode, as of an electrolytic cell, storage battery, diode, or electron tube. 2. The positively charged terminal of a primary cell or a storage battery that is supplying current.

Is cathodic a word?

pertaining to a cathode or phenomena in its vicinity. Also cath·o·dal [kath-uh-dl].