Question

what is corrosion and prevention of corrosion

Answer 1

Corrosion is the process in which metals are eaten up gradually by the action of air, moisture or a chemical in their surface. Eating of iron metal is the most common form of corrosion.

Ways to prevent from corrosion are as follows :-
a. Cathodic Protection from Corrosion,we can use any other metal in just place of it so that it reduces the forecast contact of it from Air.
b. Metal Selection and Surface Conditions ,we can use also alloy in spite of using the pure one.
c. Environmental Modification, we can also avoid to put it in environment directly.

Answer 2

It is the process in which metals are eaten up by the action of air , moisture or chemicals such as an acid on thier surface .
                     it is mainly caused by the oxidation of metals or by oxygen of air .
 Rusting of iron is the most common form of corrosion.    
  *Prevent a substance from corrosion (rusting) are :
       1. by providing oily or greasy layer 
       2.by painting the substance 
      3. by electroplating