The biggest reason why silver turns black is oxidation. Silver is a very active metal. After wearing it for a long time, it will oxidize with oxygen in the air to form silver oxide. Generally, the color is brown or gray black. In addition, if the environmental quality is too poor, silver is easy to turn black over time. Why does silver turn black? With the changes of the times, people's aesthetic concept has gradually increased. Now there are many gold and silver jewelry on the market. They have certain value and excellent viewing degree. However, jewelry made of silver often turns black after long use. What is the reason?
Silver turns black because of the oxidation reaction of silver. Silver is a very active metal. After wearing it for a long time, silver will oxidize with oxygen in the air to form silver oxide, which is brown or gray black, which will mask the luster of silver itself and affect the viewing degree. It is recommended to clean it in time.
In addition, if our ambient air quality is too poor and contains some acidic gases, such as oxygen sulfide, silver will also combine with sulfur in the air to produce silver sulfide, that is, silver scale, which is also black.