The cathodic protection is a branch of the electrochemistry that prevents the corrosions. It can be applied to metallic materials keep in touch with aggressive surroundings that have a considerable electric conductivity.
One can apply this technique when a direct current circulates between an electrode (ANODE) puts in the surroundings and the surface of the structure to protect (CATHODE).
The current, causing the lowering of the metallic material’s potential, reduces the corrosion speed until it stops. |