Question

what do you mean by corrosion? why do copper vessels develop a greenish layer when exposed to moist air?​

Answer 1

Explanation:

a short and simple meaning of corrosion comes up to know about the term rusting of iron when exposed to air.

There are five general types of corrosion: galvanic, stress cracking, general, localized, and caustic agent corrosion. Galvanic corrosion is extraordinarily common and occurs when two metals with different electrochemical charges are linked via a conductive path.

When any copper vessel is exposed to the air it reacts with the compounds present in the air and we can see that the colour of the copper vessel changes into green. thats bcoz of tue reaction with the hydrogen,oxygen/vapour and etc compounds.

Green coating of basic copper carbonate is a mixture of copper carbonate and copper hydroxide , CuCO3. Cu (OH)2