Question

What is corrosion? please​

Answer 1

Corrosion is the process in which a refined or pure metal to a more chemically-stable form such as oxides.

Answer 2

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$\bold{\small{\color{blue}{Corrosion:}}}$

The surfaces of many metals become either dull or are slowly eaten up when these are kept in open for a long time when it reacts with moisture, air and water. This process is known as corrosion.

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$\bold{\small{\color{blue}{Example:}}}$

The surface of copper acquires a green coating due to the formation of basic copper carbonate which is a compound of copper hydroxide and copper carbonate. This is because of a chemical reaction that has taken place in the metal and the constituents of air.

$\bold{\small{\color{red}{Reaction:}}}$

$2Cu + H_2O + CO_2 + O_2 ----> Cu(OH)_2.CuCO_3$