Limitations in Assessing Corrosion of Stainless Steel Rebar

Stainless steel (SS) rebar has been increasingly used in marine substructures due to its superior corrosion resistance over plain carbon steel (CS). While investigations have thoroughly addressed the reliability of corrosion detection techniques of CS rebar, very little work has examined the applicability of these techniques to SS rebar. This study evaluates the sensitivity of traditional corrosion detection methods such as half-cell potential and electrochemical impedance spectroscopy to SS corrosion in concrete. Modifications to existing methods or recommendations for more suitable methods or interpretations are considered.