Fuel cells rely on catalysts for both the anodic and cathodic reactions. The cathodic current is balanced by the anodic current. The net current density is the difference between the cathodic and anodic current density. There are two types of EPD processes, anodic and cathodic. The ratio of the surface areas between the cathodic and anodic region is significant. The reason for the two compartment cell is to separate cathodic and anodic reaction. An improved cathodic protection system will enhance corrosion protection. Galvanizing, while using the electrochemical principle of cathodic protection, is not actually cathodic protection. Some bacteria are able to utilize hydrogen formed during cathodic corrosion processes. In the 1950s a means of preventing pipeline corrosion known as cathodic protection became available. Hazardous product pipelines are routinely protected by a coating supplemented with cathodic protection. Fluoropolymer / HMWPE insulation cathodic protection cable is typically made with dual insulation. It can also synthesize by Physical Vapour Deposition technique such as Cathodic arc deposition. Receives no maintenance except ships on donation hold, which undergo dehumidification and cathodic protection. Cathodic protection is typically employed to overcome this problem.