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Tarnish is a layer of corrosion that develops over copper, brass, silver, aluminum as well as a degree of semi-reactive metals as they undergo oxidation. It is analogous to rust, but with a slower rate of occurrence. It is mainly caused by chemicals in the air such as sulphur. It appears as a gray or black film over the metal. Chemistry (to be written) --> Prevention Most tarnishing is prevented by tinning, a process by which the reactive substance is coated in a non-reactive substance, such as tin or wax, and thus protected from oxygen. Another way to treat tarnish is to put a drop of water and some flouride toothpaste on a tissue and rub it on the silver (or metal, but silver is the most common to be targeted by tarnish,). These methods work well, but tarnish is very easily prevented by constant use and washing with a mild dish soap. | |||||||
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