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Bronze Disease
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Providence, RI 02912
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Bronze disease is a form of corrosion that affects bronze artifacts. It manifests itself as either a powdery green substance on the surface of the metal or as a warty or waxy film over the surface of an artifact. To the untrained eye, it may simply resemble a natural patina. However, while a patina is not destructive, bronze disease most certainly is.
In reality, “bronze disease” is not the result of bacteria, as the name would suggest, but the result of a complex chemical reaction. It is known as bronze disease because the reaction produces a green powder on the surface of bronze artifacts that resembles a fungus. This corrosion is much like rust on iron. This corrosion is caused by a circular set of reactions that involve the chlorides of a copper alloy and water. Bronze disease is triggered by the presence of water in this equation. It might take just one humid day to activate the ....

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