How long does it take copper to turn green?

Copper turns green due to oxidation, this is commonly referred to as a ‘patina. It can sometimes take several years for the process to occur, as it depends on environmental conditions like temperature, humidity, and the copper’s exposure to air and water; you don’t see it turn green overnight.

Why does Copper turn green after oxidation?

However, it undergoes oxidation reaction and turns green after being exposed to air. A prime example of copper oxidation is the Statue of Liberty, wherein a green color has developed on the structure’s surface due to redox, and not due to effect of acid rain, as generally believed by people.

What are some examples of copper turning green?

Another famous example of copper turning green is the historic copper-domed roof of the Canadian Parliament Buildings in Ottawa, Ontario. Constructed in the early 20th century, the buildings feature a distinctively green copper dome as a prominent architectural feature.