Anodes
made of lead alloys are used in the electrowinning
and plating of metals such as manganese, copper,
nickel, and zinc. Rolled lead-calcium-tin and
lead-silver alloys are the preferred anode materials
in these applications, because of their high resistance
to corrosion in the sulfuric acid used in electrolytic
solutions. Lead anodes also have high resistance
to corrosion by seawater, making them economical
to use in systems for the cathodic protection
of ships and offshore rigs. |