Comparative corrosion studies of conventional nickel-based brazing alloys and newly developed iron-based brazing alloys

This paper presents newly developed iron-based brazing alloys, which are an interesting and a cost efficient alternative for commercial nickel-based brazing alloys. Comparative corrosion studies (potentiodynamic corrosion test) show, that the iron-based brazing alloys exhibit at least similar, but mostly better corrosion behaviour than the nickel-based brazing alloys. Furthermore, the paper presents results from a dynamic corrosion test in conformity with DIN EN 15664-1. The determined values show for the first time, that the release of nickel-ions from nickel-based brazing alloys is within the prescriptive limits of the drinking water regulation.