(Wikimedia CC Cmglee.)
The hull of the Cutty Sark
(above) is clad in a copper alloy called Muntz metal (60% copper and
40% zinc). This stopped the attachment of barnacles and seaweeds to the
hull, which would slow down the ship and need frequent scraping off,
meaning the ship could travel faster, delivering goods in less time and
improving profits for the company.
Aquaculture is a $100 billion global industry that supplies almost half the world's demand for fish and is the fastest growing animal-food producing sector worldwide. Copper alloys inherently resist biofouling, without any special treatments or additions.For this reason, modern fishing nets and marine farm enclosures are often made from copper alloys.
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