corrugated was invented,
and patented (in 1829) by British architect and engineer
Henry Robinson Palmer who worked for the London Dock
Company. It was originally made from wrought iron and
was promoted as a lightweight, strong, easily transported
building material ideally suited to prefabricated structures.
On the New Zealand goldfields in the 1860s corrugated
iron was used extensively and a Dunedin (NZ) company
began producing “galvanised iron”, in 1864, to meet demand.

Corrugated Creations (Tirau, NZ) makes signs from recycled,
and new, corrugated iron.