Environmental Degradation of Materials — Summer 2024

Using proper examples explain how corrosion can be used as useful process.

Briefly discuss different losses due to corrosion.

Derive Nernst equation for electrode potential.

Define Corrosion. Discuss effect of anodic area on corrosion.

What is galvanic series? Discuss it’s uses in corrosion studies.

Describe Faradays’ laws of electrolysis and their role in corrosion measurement and prevention.

Explain electrochemical theory of wet corrosion with suitable example.

Explain the reason for breakdown of the passive layer in pitting corrosion.

What is differential aeration cell? Discuss With respect to crevice corrosion.

Describe the concentration polarization and activation polarization.

Discuss the factors which increase pitting.

Discuss causes and way of prevention of crevice corrosion.

Discuss the Pourbaix diagram for Fe-H Osystem.2

Justify the role of material selection in corrosion protection.

Write a note on dezincification.

Discuss causes, mechanism and way of prevention of erosion corrosion.

Justify the role of design aspects in corrosion protection.

Write a short note on alteration of environment for corrosion prevention.

Discuss causes, mechanism and way of prevention of stress corrosion cracking.

Prior to coating, metal surface needs cleaning. Explain why?

Explain one method for wear rate measurement

Explain impressed current cathodic protection method.

Define wear and list types of wear.

Compare cathodic protection method with anodic protection method.

Describe the Tafel’s extrapolation method for corrosion rate measurement.