why copper-T did not get rust
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It Corrodes However, it will oxidize and turn dark brown and then green over time. The Statue of Liberty looks green because copper has a property of turning green due to carbon dioxide and the moisture in the air. That is not rusting; it is called copper patina. More info Exposure to air or oxygen causes the brownish film on copper piping. Water - especially mineralized water - causes greenish or bluish corrosion. And deionized water can pull copper metal from the piping and cause pitting or damage. The term "rusting" is reserved for the corrosion of iron. Copper does not rust. Rust is a mixture of hydrated iron oxides so, by definition, if will only form on iron and iron-rich materials (such as some types of steel). Copper can get a covering of Verdigris, which is a green-colored compound.
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