Investigating acute coin discoloration by solution immersion
The third series of the 20 sen and 50 sen coins made of nickel-brass are prone to discolouration after few years of circulation. The discolouration causes tire brass colour golden coins to change greenish in colour. In order to investigate the discoloration, new 20 sen coins were exposed to vario...
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| Format: | Monograph |
| Language: | English |
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Pusat Pengajian Kesihatan
2015
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| Online Access: | http://eprints.usm.my/60032/1/MUHAMMAD%20FAKHRIY%20BIN%20ABLLAH%20-%20e.pdf |