The ability to protect rusted surfaces is of critical importance because a corrosion inhibitor rarely encounters a truly clean metal surface, except perhaps immediately after a chemical cleaning.  In the study presented in this paper, advanced electrochemical methods including electrochemical impedance spectroscopy (EIS), cyclic polarization (CP), and open circuit potential (OCP) were used to evaluate the effectiveness of corrosion inhibitors in passivating rusted surfaces.  The relative performance of several traditional and advanced corrosion inhibitors is provided together with a mechanistic discussion.

17-02: Can Rusted Surfaces be Effectively Passivated to Reduce Further