Page 31 - Curriculum Visions Dynamic Book
P. 31
Two different methods of protecting a sheet of metal using zinc, a process called galvanizing: by hot dipping in zinc (above) and by electroplating (below).
Steel strip or wire
+–
Anodes Cathode
(Above) Zinc-plated steel – often called corrugated iron – has long been an inexpensive building material.
Molten zinc electrolyte
31
(Above) Much modern cutlery is stainless steel.
Gas shield protects steel strip as it enters the hot dip
Molten zinc bath
Steel strip or wire
“Knife” uses
high pressure gas
(Left) Galvanized barbed wire has a surface coating of zinc.
Galvanized steel strip or wire
