Abstract
The purpose of this study is to evaluate the galvanic behavior between UNS S31803 duplex stainless steel and brazing filler metals. The Ni-Cr-Fe-P filler metals were prepared by mechanical alloying using the BNi-7, iron and chromium powders as starting materials. Increasing the adding amount of Fe and Cr powders was increases the deviation of corrosion potential of the filler metal from UNS S31803 plate. However the galvanic corrosion current between the filler metals and UNS S31803 plate were decreased as the adding amount of alloying element increase. From the immersion test, it is shown that weight loss of brazed joint using Ni-22r-8.IP-10Fe filler was the lowest among all testing fillers. Immersion test results have been confirmed the results of galvanic test.
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