Cathodic protection

Every year, considerable economic values are lost due to corrosion in steel pipelines, tanks/vessels and district heating pipelines, among others. In addition to safety and environmental aspects, cathodic protection (CP) offers the optimum protective measure for structures in addition to passive protection (e.g. coatings).

The principle of cathodic protection is based on reversing the corrosion process, thereby reducing the corrosion rate to a technically negligible level.

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There are several procedures:

CP due to external current

External current protection structures essentially consists of a transformer rectifier unit and an anode structure. The transformer rectifier unit provides the required cathodic protection current, which enters the cathode from the anode system through the ground into the coating holidays.

CP through galvanic anodes

These are particularly suitable for well-sheathed, short pipelines and tank farms with lower protective current requirements.

CP of complex structures (LKS)

For objects that cannot be separated from the existing earthing system for technical reasons, local cathodic corrosion protection (LKS) can be installed.

Cathodic Internal Protection (KIS)

For the protection of tank containers and pipelines with conductive medium, the installation of a KIS is required.