The European standard “EN 12954 General principles for cathodic protection of buried or submerged metallic structures on the shore ” describes the general principles for the application and management of cathodic protection systems against corrosive attacks on structures buried or in contact with soil, surface freshwater, or groundwater, whether or not there is interference from external electrical sources. This standard includes the protection criteria that must be achieved to demonstrate the effectiveness of cathodic protection.
It may be impossible to use the criteria defined in this standard for structures that cannot be electrically isolated from adjacent impressive structures. In this case, the “EN 14505 Cathodic protection of complex structures” standard is complied with.
To help decide whether cathodic protection should be applied, the possibility of corrosion can be evaluated using the information contained in the standard annex (Appendix A). In this annex, "EN 12501-1 Protection of metallic materials against corrosion - Possibility of corrosion in soil - Part 1: General" and "EN 12501-2 Protection of metallic materials against corrosion - Possibility of corrosion in soil - Part 2: Low alloyed and non-alloyed ferrous materials" standards The requirements are explained.
Cathodic protection of structures submerged in seawater is covered by the “EN 12473 General principles of cathodic protection in seawater” standard and a number of standards specific to various applications.
Cathodic protection for reinforced concrete structures is within the scope of the standard "ISO 12696 Cathodic protection of steel in concrete".
EN 12954 standard is valid together with the following standards:
In general, cathodic protection is a method applied to prevent corrosion in metallic structures under water and underground. This method is one of the most effective methods of preventing corrosion on metal surfaces. It is widely used to protect against corrosion many structures such as ships, offshore floats, subsea equipment, ports, pipelines, tanks, basically all submerged or buried metal structures.
The cathodic protection technique is based on converting the active areas on the metal surface into passive ones, that is, turning them into the cathode of an electrochemical cell. By applying current, the potential of the metal is reduced, the corrosion attack is stopped and cathodic protection is provided.
The simplest method of implementing cathodic protection is sacrificial anode cathodic protection. In this method, the metal to be protected is connected to another metal that corrodes more easily, which will serve as an anode. Zinc, aluminum and magnesium are metals commonly used as anode. The most active metal forms the anode of the others and sacrifices itself by corroding (giving up metal) to protect the cathode. That's why the term sacrificial anode is used.
Among the numerous testing, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides testing services defined in the standard "EN 12954 General principles of cathodic protection of buried or submerged coastal metallic structures" with its trained and expert staff and advanced technological equipment. .
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