The microstructure of brazing alloys to B.S. 1845 and to certain proprietary specifications is reviewed and related to corrosion performanee in sea water on joints with copper, 70/30 cupro-nickel and 7% aluminium bronze. The factors influencing corrosion are illustrated and discussed and recommendations are made as to the suitability of various braze metal-parent metal combinaiions. Of seven brazing alloys tested with the three parent materialsi only two were completely satisfactory, two could be used within certain limitations and three were unsatisfactory.
