Questions on Corrosion Science and Metal Finishing

CORROSION AND METAL FINISHING

1. What is corrosion?  Discuss the electrochemical theory of corrosion by taking rusting of iron as an example

2. Explain the factors affecting the rate of corrosion.

3. What is galvanic series? Explain how galvanic series is useful in predicting corrosion tendency of metals and alloys?

4. Explain Galvanic (Differential metal) corrosion with an example.

5. What is Differential aeration corrosion? Give example.

6. Explain waterline corrosion.

7. Write a note on pitting corrosion.

8. What is stress corrosion?  Give examples.

9. Write a note on Caustic embrittlement in boilers.

10. What is cathodic protection? Explain how the corrosion of a metal is controlled by   cathodic protection method.

11. What is metal coating? Write a note on Galvanization.

12. Write a note on Tinning. Mention its uses.

13. What is anodizing? Write a note on anodizing of aluminium.

14. Write a note on Phosphating. Mention its applications.

15. What is metal finishing? Mention its technological importance.

16. What is decomposition potential? Explain its significance.

17. What is over voltage (over potential)? Mention the factors affecting it.

18. What is electroplating (electrodeposition)? Explain its Mechanism.

19. Explain the factors affecting the nature of electrodeposit.

20. Explain how electroplating of nickel is carried out?

21. Explain how electroplating of chromium is carried out?

22. What is electroless plating? Mention its advantages.

23. Explain the electroless plating of copper. Discuss the manufacture of double sided printed circuit board with copper and mention its applications.

24. Differentiate between electroplating and electroless plating.