Cathodic (or active) corrosion prevention is a technical process in which a potential reduction of corrosion is achieved with the aid of a cathodic current. At the level of around 850 mV (which is referred to as the cathodic prevention potential), the electrochemical corrosion process is almost entirely halted. The corrosion speed is reduced to a virtually negligible level of less than ten micrometres a year.
The FPI inspects cathodic corrosion prevention systems every three years (performance checks). During this procedure the precise settings and thresholds for the operator's periodical function inspections are also specified.
Each inspection is concluded with a detailed report.