[en] A program is in progress to develop a quantitative method (Electrochemical Potentiokinetic Reactivation) for nondestructively measuring the degree of sensitization in Types-304 and -304L stainless steels. The technique has been extended to characterize weld heat-affected zones and to correlate degree of sensitization with intergranular stress corrosion cracking resistance. A portable electrochemical cell and polarization system were developed and qualified for obtaining EPR measurements in-situ, on components in the field. A specification was issued for conducting an EPR test in the laboratory and procedures were initiated to conduct a round robin test for adoption of the EPR method by ASTM as a standard practice