Within the realm of engineering, Cathodic Protection Systems are extremely important. These systems are specifically designed to protect underground storage tanks from corrosion. Such protection is essential because many of these tanks often contain harmful materials. There are two types of Cathodic Protection Systems that are allowed to be installed: Sacrificial Anodes and Impressed Current.
Impressed Current Cathodic Protection
Sacrificial anodes are metal attachments that contain a greater electric charge than the metal of the underground storage tank. This greater electrical charge allows the corrosive effect to be deposited onto the anodes and away from the underground storage tank. Once the sacrificial anodes are corroded they have to be replaced.
Impressed current systems are used as the preferred way to protect larger underground tanks that are too big to be protected using a sacrificial system. Impressed current systems work by connecting anodes to DC power from a nearby AC system using a rectifier. Impressed current systems work by directing the current into metal bars buried in the ground via an insulated wire. The current prevents the system from becoming corroded via the current.
Once installed Cathodic protection systems must be inspected by a qualified inspector. Additionally, systems have to be carefully maintained and inspections are conducted every few years. The proper maintenance of these systems guarantees that erosion does not occur (also see Advanced Water Treatment Systems for Large Boats).
All Underground tank systems are required to have one of the aforementioned anti-corrosion systems. Various engineering services can install this type of system. Environmental agencies are adamant that such systems greatly reduce pollution by preventing harmful materials from entering the air and the ground. The absence of such a system or the failure of an anti-corrosion system could prove disastrous.
Cathodic Systems play an important role in ensuring the safety of underground tank systems. In the years to come it is likely that new and innovative systems will be developed for cathodic systems. For additional information on these systems http://www.cathodicme.com is an excellent and informative resource.