Definition of Cathodic protection:
Method of protection for iron and steel against electrochemical corrosion. Two types of cathodic protection are: (1) Active, in which a low voltage (usually 40 to 50 volt) direct current is imposed between the exposed parts of a structure and the ground. (2) Passive, in which an anode (positive electrode) made of a more reactive metal (such as a magnesium alloy) is sacrificed to protect a structure acting as a cathode (negative electrode). Cathodic protection is the most widely applied anti-corrosion control technique in electrolytically conducting environments such as seawater and soils containing water. Invented in 1824 by the UK scientist Sir Humphrey Davy (1778-1829) to protect the copper-cladded wooden ships from seawater corrosion. Also called sacrificial protection. See also anodic protection.
Protection of a metal structure from corrosion under water by making it act as an electrical cathode.
How to use Cathodic protection in a sentence?
- A process called cathodic protection will reverse the effects of salt corrosion by passing a small electric current through steel reinforcements inside the concrete.
- The metal needed to be protected, so we decided it was time to implement some cathodic protection on all of our iron and steel stuff.
- You should try and make sure that you have cathodic protection and use it in a way to help your business.
- It is important to make sure that you have a good cathodic protection on any valuable machinery you have in your factory.
Meaning of Cathodic protection & Cathodic protection Definition