Cathodic Protection

What is Cathodic Protection?

Cathodic protection (CP) is a method of corrosion control that can be applied to buried and submerged metallic structures.

It is normally used in conjunction with coatings and can be considered as a secondary corrosion control technique. The primary corrosion control method on any given structure is normally a coating system which can be between 50 and 99 % efficient depending upon age, type, method of installation, etc.

A properly designed and maintained cathodic protection system will take up the remainder resulting in a 100 % efficient cathodic protection system.

Why is it Important?

Corrosion costs money

It is estimated that somewhere between 3 and 5 % of the gross national product (GNP) of industrialised countries is attributed to corrosion damage. Corrosion of metals costs an average economy almost $300 billion per year and it is estimated that one third of this value could be saved with better selection of corrosion prevention techniques, including Cathodic Protection.

The Principles of Cathodic Protection

Useful metals are often extracted from their naturally existing states (as ores) to be commerically and industrially viable. However, due to their chemical nature, there’s a propensity for these metals to revert back to their initial states (metal oxides). This process is often known as corrosion in layman terms and the most common example notable in everyday life is the rusting of iron and its various alloys, an example being steel.

Advantages and Uses of Cathodic Protection

The primary benefit Cathodic Protection offers over other anti-corrosion systems is its ability to be deployed merely by the mantainenece of a Direct Current Circuit. Also, the effectiveness of the applied Cathodic Protection can be easily monitored as well as regulated by adjusting the properties of the Direct Current passing through the system. It can also work hand with hand with Anti-Corrosion coatings, where the coatings may have been copromised. It’s also applied to marine architecture structures to counter the effects of corrosion, hence increasing the lifesspan of these structures.

Why we should go with CATHODIC marine engineering

Cathodic have over 14 years manufacturing and design experience in providing comprehensive Cathodic Protection (CP) and Marine Growth Prevention Systems (MGPS) to the Marine, Offshore Oil & Gas, Offshore and Marine Civil Industries.

Cathodic where necessary can also assist as corrosion engineers for CP design, service work and corrosion inspection and testing.

Cathodic very stringently meet specification requirements that meet, DNV-RP-B401, ISO 15589-2 and NORSOK M-503 ,MIL-A-18001K, ASTM B418 Type I and Type II.

Our full range of Marine and Offshore anodes manufactured in accordance with NACE and ASTM requirements. Technical design complying with BS 7361, DNV RP B401 and NORSOK Standard M-503.