Cupronickel alloys such as 70/30 Cu-Ni have excellent resistance to sea water corrosion and anti-fouling properties. and thus have been widely used for naval and offshore applications. Traditionally. arc welding and brazing processes have been used to weld such materials. https://www.spidertattooz.com/Essie-Day-Drift-Away-0-5-oz-170-p14961/