Effect of controlled microstructure brazed with foil-type Ni-based filler metal on corrosion resistance of stainless steel joint

Abstract

evaluation by electrochemical method and the microstructure observation by EPMA analysis. From the results of the polarization curve, the corrosion resistance at the brazing time of 3 hours was the best. Results of microstructure observation, it was confirmed that the formation of the Cr-depletion zone was suppressed when the brazing time was 1 hour and 3 hours. From these results, it was suggested that good corrosion resistance of the brazed joint was obtained by long time brazing. These results provide new insights in determining future brazing conditions.