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老银元会变黄吗

更新时间: 2020-11-08 00:00:00     

老银元是会变黄的,原因是人体汗液中含有很多硫,跟银饰接触,就会发生化学反应。银离子与硫离子容易产生化学反应,会在表面产生了硫化银;所以随着硫化银的增多,白银表面颜色便逐步由白色变黄。

关键词: 银元

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