Staining of bronze sculptures, determining the causes


Copper and its alloys have been widely used since prehistory. This is because when they are exposed to non-contaminated atmospheres it starts to grow on their surface a thin layer of copper oxides which provide excellent corrosion resistance. In fact, they provide good corrosion resistance in various environments. However, when the layer of corrosion products is not formed in the proper way, interference colors can be assumed. And when the aesthetic aspect is important, as it is for works of art, the loss of the original appearance can result in a huge prejudice. In this sense, this work presents all the study conducted for the identification of the causes that led to the appearance of brilliant gray stains on bronze sculptures surface.

MOREIRA, Anna Ramus; BARBOSA, Karen; ALMEIDA, Neusvaldo Lira de; PANOSSIAN, Zehbour. Staining of bronze sculptures, determining the causes. In: EUROPEAN CORROSION CONGRESS, 2014, Pisa, Italy. Proceedings… 10 p.

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