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Research on the White Spots Appeared on Gold Ornaments' Wearing Process
Author(s): 
Pages: 78-80
Year: Issue:  3
Journal: Precious Metals

Keyword:  metal materialsgoldmercurywhitereduction;
Abstract: The white spots appeared on gold ornaments in wearing process were studied. In the experiment, gold pieces were soaked into mercury ion solutions with different concentrations. The results showed that mercury ion alone can not change gold color into white; under the conditions of adding reduction agent and the concentration of mercury ion reaching a certain value, the white spots appeared on gold pieces. The relationship between concentration of mercury ion and white changing degree of gold pieces was studied.
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