Nordic Gold

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
50 euro cent coin made out of nordic gold.

Nordic gold (Swedish: nordiskt guld[1]) is the gold-coloured copper alloy from which many coins are made. It had been in use for a number of coins in many currencies, most notably in euro 50, 20, and 10 cents, in the Swedish 5 and 10 kronor coins, the latter of which it was originally developed for,[2] as well as the Polish 2 złote commemorative coins. Its composition is 89% copper, 5% aluminium, 5% zinc, and 1% tin.[3]

Being a copper alloy, it contains no gold. Its colour and weight are unlike pure gold. It is non-allergenic; its other advantages include antimycotic[4] and weak antimicrobial (especially after abrasion)[5] attributes, and resistance to tarnishing.

References[edit]

  1. ^ Predecimal.com. "The selection of the alloy for the New Euro Coins". Retrieved 2007-05-29.
  2. ^ "Nordic Gold in our pockets". scda.com. Scandinavian Copper Development Association. Archived from the original on July 23, 2012. Retrieved May 12, 2015.
  3. ^ Gizmology.net. "Notes on metals". Retrieved 2015-01-16.
  4. ^ Quaranta, Davide; et al. (January 2011). "Mechanisms of Contact-Mediated Killing of Yeast Cells on Dry Metallic Copper Surfaces". Appl. Environ. Microbiol. American Society for Microbiology. 77 (2): 416–426. doi:10.1128/AEM.01704-10. PMC 3020553. PMID 21097600.
  5. ^ Ha, H.; et al. (2011). "Tarnishing and Cu Ion release In Selected Copper-Base Alloys: Implications Towards Anti-Microbial Functionality". Abstract #1797, 220th ECS Meeting. The Electrochemical Society. Abstract #1797. Retrieved 2 February 2014.