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Volume 8 Issue 3
Sep.  2006
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YUAN Jun-ping, WANG Chang, SHEN Ke-ya, XIAO Dong-lin. Commentary on Anti-Tarnishing Experiment and Evaluation Method of Silver Alloy[J]. Journal of Gems & Gemmology, 2006, 8(3): 36-39.
Citation: YUAN Jun-ping, WANG Chang, SHEN Ke-ya, XIAO Dong-lin. Commentary on Anti-Tarnishing Experiment and Evaluation Method of Silver Alloy[J]. Journal of Gems & Gemmology, 2006, 8(3): 36-39.
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Commentary on Anti-Tarnishing Experiment and Evaluation Method of Silver Alloy

  • 1. Jewelry Institute of Panyu Polytechnic, Guangzhou 511483, China;

  • 2. Guangzhou Noble Jewelry Co. Ltd., Guangzhou 511400, China

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  • Received Date: July 09, 2006
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    • Abstract
  • Abstract: It is well known that silver alloy is prone to tarnish. The anti-tarnishing experiments can be taken to confirm a certain alloy's anti-tarnishing capability. There are two kinds of experiment methods, which are outdoors and laboratory experiments. Though the outdoors experiment could more really reflect alloy's anti-tarnishing capability under the certain environment, it need a long experimental time and has the lower reproducibility of the results. The laboratory experiment could be divided into two types, which are liquid experiment and gas experiment. The former includes the methods that the materials are soaped into corrosive solution like Na2S solution, artificial sweat and salt water, etc, and the later includes H2S experiment, SO2 experiment and mixed atmosphere experiment. The common methods to evaluate alloy's anti-tarnishing capability include mainly naked eye observation, weighing weight, microcosmic analysis of corrosion film and spectrophotometer.
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    • References (18)
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