what is corrosion of copper and brass calles?
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Corrosion is a galvanic process by which metals deteriorate through oxidation—usually but not always to their oxides. For example, when exposed to air, iron rusts, silver tarnishes, and copper and brass acquire a bluish-green surface called a patina.
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It is called corrosion only. There is no special name. The outer layer formed due to corrosion is called patina.
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