![]() ![]() How is this green patina formed on copper? That's why in this post I want to comment on how the natural corrosion process of copper gives us this colorful patina. ![]() Knowing how this protective layer is formed will give you another vision of the changes that occur throughout the history of our monuments or some family memory. In this way, although copper does not maintain its metallic shine, it is a metal that is adorned with a beautiful patina that can even tell its story. The particularity of copper, is that this patina formed by the process of corrosion, then protects it from the same, preventing the metal from deteriorating over time, thanks to this are so durable our heritage and at the same time look elegant beauty, because this patina is changing color over time and is unique to each place due to its different climatic conditions, so the beauty of copper and its alloys is unique among decorative metals. So, when exposed to the environment they slowly combine with some elements found in the air to return to their natural state. This bluish-green patina on the surfaces of copper or its alloys is a layer of copper salts produced by the corrosion process experienced by this metal due to the action of chemical agents present in the atmosphere, since, like other metals, copper oxidizes due to the natural tendency it has to return to its mineral state that is, in the form of rust. What is interesting is that a phenomenon as undesirable as the corrosion of metals can produce such a decorative patina, which is even highly desirable. Source: trumpet player and Minneapolis City Hall, public domain images. Well, it may not seem very curious but this effect is produced by the natural corrosion of copper. ![]() You may have noticed that the monuments made of copper or bronze that rest in squares and public places develop a curious green coating, this effect can also be seen in the old buildings of many cities. ![]()
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