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Explain the types of corrosion ....

Explain the types of corrosion .

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Types of Corrosion :
Dry Corrosion or Chemical Corrosion :
(i) Corrosive action in the absence of moisture .
(ii) It is the process of a chemical attack on a metal by a corrosive liquids or gases such as `O_2,N_2,SO_2,H_2S` etc .
(iii) It occurs at high temperature .
Wet Corrosion or Electrochemical Corrosion :
(i) Corrosive action in the presence of moisture .
(ii) It occurs as a result of electrochemical reaction of metal with water or aqueous solution of salt or acids or bases .
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