Question

how does silver corroded

Answer 1

All metals, apart from pure gold, will corrode naturally when exposed to elements such as air.High relative humidity, moisture, and air pollutants are common causes of corrosion in metals, including silver.

Silver is known in the chemistry world as a noble metal which means it is resistant to corrosion, but not completely. Whether silver plating or pure silver, the composite of the metal will tarnish when exposed to air and sulfur.

Tarnish is a chemical reaction on the surface of metal (copper, brass, silver, etc.) and causes a layer of corrosion. In the case of silver tarnish, the silver combines with sulfur and forms silver sulfide (AgS) which is black. The original silver surface can be restored if the layer of silver sulfide is removed.

On some metals, tarnish serves as a protective layer known as a patina and is typically found on copper and bronze roofing, architectural elements, statues and bells

Answer 2

tarnish is chemical reaction on the surface of metal (copper,brass,silver,etc.)and corrosion .In the case of silver tarnish,the silver combines with sulphur and forms silver sulfide which is black . The original silver surface canbe restored if the layer silver sulfide is removed.
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