Anodic Polarization Studies in Neutral and Alkaline Solutions Containing Corrosion Inhibitors

In neutral and alkaline solutions containing both inhibitive and corrosive constituents corrosion becomes localized and weight loss measurements are of little value in finding out when solution becomes corrosive. Points of attack also vary considerably at border line concentrations. An elegant method of finding out at what concentration of corrosive constituents such solutions become corrosive is described. The method is based on anodic polarization measurements over as short a period as 5 min and takes into account the mechanism of passivation of metal surfaces in such solutions.