what is corrosion????????
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Hello mate...
Corrosion is a natural process that converts a refined metal into a more chemically-stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment.
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when a metal is attacked by substances around it such as moisture, acids etc. it is said to corrode and this phenomenon is known as corrosion.
eg- the black coating on silver and the green coating on copper
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