Characterization and performance of UNS S63019 (21-4N) as bipolar plate material in a simulated polymer electrolyte membrane fuel cell environment

► S63019 performed poorly for bipolar plate application in PEMFCs. ► Niobium carbide particles in the alloy did not reduce ICR. ► High carbon content reduced corrosion resistance of S63019. ► High nitrogen content did not improve corrosion resistance of S63019.