II. following questions in English

II. Please answer the following questions in English !

1. May atmospheric oxygen cause corrosion on metal.? Jawab : Yes, I can.
2. Tell us some materials capable of conducting electric current! Jawab : Aqdeous solution of acids, bases, salts.
3. How many classes of corrosion do you know ? Jawab : There are 4 classes : 

• Atmospheri corrosion.
• Gas corrosion.
• Chemical corrosion.
• Electrochemical corrosion.

1. Explain brietly the chemical corrosion  Jawab : Chemical corrosion , that are to reaction between the metal and gasses or liquid dielectries.
2. Which metal is most subject to corrosion ? Jawab : Iron and steel.
3. How do you improve the corrosion of metals ? Jawab: The corrosion resistance of metals can be improved by adding alloying elements.
4. What is the function of coating metal surface with paints or enamels ? Jawab : For corrosion protection.