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Numerous bullion coins have been issued. Tin: Portuguese Malacca 1521–1557 bastardo; Malaysia tin hat money; Great Britain farthing and halfpenny 1684–1692; Thailand satangs from the 1940s. Zinc: Twelfth century Indian coins were made of zinc. Vietnamese cash coins of the 1800s were made of zinc, as was the Vietnamese Tonkin 1/600 piastre ...
The Parkes process is a pyrometallurgical industrial process for removing silver from lead during the production of bullion.It is an example of liquid–liquid extraction.. The process takes advantage of two liquid-state properties of zinc.
Zinc smelting is the process of converting zinc concentrates ... One of the advantages of this process is that it can co-produce lead bullion and copper dross. In ...
A copper-based alloy with zinc. brockage Originally referring to metal wasted in coin production, now means coins struck when the previous coin remains stuck to a die, creating an incuse impression in the next struck coin (primarily found in ancient coins). bronze. Also abbreviated Æ [2] or AE [3]. A copper-based alloy with tin. bullion
Examples include iron, nickel, lead and zinc. Copper is also considered a base metal because it oxidizes relatively easily, although it does not react with HCl. In mining and economics, the term base metals refers to industrial non-ferrous metals excluding precious metals. These include copper, lead, nickel and zinc. [3]
The unique composition of the coin (low-grade steel coated with zinc, instead of the previously 95%-copper-based bronze composition) has led to various nicknames, such as wartime cent, steel war penny, zinc cent and steelie. The 1943 steel cent features the same Victor David Brenner design for the Lincoln cent which had been in use since 1909.
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