Effect of Mass Transfer Conditions on Double-Loop EPR Sensitization Testing of Austenitic Stainless Steel

Abstract

Previous work showed that mass transfer conditions affect the critical current density during potentiodynamic polarization measurements on Type 304 stainless steel in dilute sulfuric acid containing thiocyanate. This work used rotating disk electrodes of sensitized Type 304 stainless steel to test whether the mass transfer conditions would also affect double-loop electrochemical potentiodynamic reactivation sensitization tests. The critical current density during the forward scan was found to increase slightly with increased rotation rate, but there was no effect on the critical current density during the reactivation scan. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0101508eel] All rights reserved.