what is a corrosion
please give me. answer
Answers
Answer:
Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, carbonate or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment.
Answer:
When a metal reacts with air or water forming an undesirable material is called corrosion. This changes the physical as well as chemical properties of that metal.
for example :
Tarnishing of silver
Silver reacts with Sulphur and Sulphur compounds in the air give Silver Sulfide which is black in color.
equation:- 2Ag(s) + H2S(g) → Ag2S(s) + H+2+(g)
Corrosion of Iron (Rusting)
When Iron reacts with air or water forming iron oxide which is brown
equation:- Fe2+ + 3O2 → Fe2O3 + xH2O
Copper Corrosion
When copper metal is exposed to the environment it reacts with the oxygen in the atmosphere to form copper oxide which is red in color.
equation:- Cu2O(s) + ½ O2(g) → 2CuO(s)
hope it helps