Elektrochemische Prüfung der Wirksamkeit von Heizöl-Inhibitoren

Electrochemical testing of the effectiveness of fuel oil inhibitors The potential/time and current density/potential curves for unalloyed steel were obtained in NaCl solutions with different concentrations of a certain type of inhibitor. The results show that the inhibitor acts as a passivator. A comparison with the results of conventional static tests shows that even a 99 pC inhibiting effect against uniform corrosion does not constitute an effective protection against pit corrosion. An effective protection is only obtained if the steel specimen can, like a platinum electrode, be polarized up to oxygen formation without any penetration of the Cl^?-ions.