Experimental protocols can have a significant impact on the evaluation of performance of corrosion inhibitors against localized corrosion and their selection for a particular application. In localized corrosion, there is a clear physical separation between the cathodic and the anodic active sites. However, there is no an easy way to clearly identify those areas and to determine their interactions with corrosion inhibitors. In the present paper, an attempt was made to separate those effects by using a novel experimental protocol along with a new electrode geometry. To conduct this work, such techniques as LPR and potentiostatic electrochemical noise (P-ECN) were employed.
Keywords: carbon steel, localized corrosion, inhibitors evaluation, linear polarization resistance (LPR), potentiostatic electrochemical noise (P-ECN).