Nordic gold is the gold-coloured copper alloy from which the middle three denominations of euro coins (50, 20, and 10 cents) are made. It has also been in use for a number of years in other countries, most notably in the Swedish 5- and 10-kronor coins for which it was originally developed (hence the Swedish name: nordiskt guld), as well as the Polish 2 złote commemorative coins. Its composition is 89% copper, 5% aluminium, 5% zinc, and 1% tin.
Despite its name, it contains no gold and its colour and weight are quite unlike pure gold. It is non-allergenic; its other advantages include antimycotic and weak antimicrobial (especially after abrasion) attributes, and resistance to tarnishing.
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- 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. Retrieved 2 February 2014.
- 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.
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