Module 5 : Electrochemistry
Lecture25 : Corrosion
  25.5

Problems

25.1) Verify the Nernst equations given in the third column of table 25.2.

 
25.2) Rationalize the slopes of the curves of figures 25.1 (a) and (b).

 
25.3) What is the difference between passivity and immunity in systems undergoing corrosion?


25.4) Define overvoltage and exchange current density. What are the physical reasons for the existence of          overvoltage?
 
25.5) How is the electrochemical circuit completed in a corrosion process?
 
25.6) What do we learn from corrosion velocity diagram?
 
25.7) What are the advantages and drawbacks of Pourbaix diagrams?
 
25.8) In addition to the standard methods for the prevention of corrosion, can you think of some new alternatives?
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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