i

Title of the course

MM 646: Thermodynamics & Kinetics of Corrosion Processes

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Credit structure

L????????? T????????? P????????? C

6 ? ? ? ? ? 0 ? ? ? ? ?0? ? ? ? ? ?6

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iii

Pre-requisite, if any

None

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iv

Course content

Difference between chemical and electrochemical reaction, Fundamentals of ion solvent interactions and their transport in aqueous, fused salt and solid electrolytes. Electrode (conducting and semi-conducting)/electrolyte double layer interface. Concept of chemical potential, Electrode potentials. Nerns?t Theory. Reference electrodes, their principles of working and construction. The concept of reversible and irreversible electrodes and exchange current density. Theory of adsorption and zero charge potentials. EH-pH (Pourbaix) diagrams their construction form basic thermodynamic data and their applications in understanding different electrochemical phenomena. Fundamental electrochemical systems viewed as energy producer, energy converter and energy destroyer. Concept of different types of over voltages in an electrochemical cell and their relation to net reaction rate at either of the electrodes. Butler Volmer relation, development of Tafels equation and its linear approximation. Theory of mixed potential and its relation to corrosion potential. Important half reactions like hydrogen evolution, oxygen reduction and active metal dissolution. Dimensionally stable electrodes. Concept of passivity and its breakdown. Origin of electrochemical noise and its applications to studies in corrosion and its control. Electrochemical instrumentation to study different electrochemical reactions.

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v

Texts/References

1.011J.O.M. Bockris and A.K.N. Reddy, Modern Electrochemistry volumes 1 &2, Plenum Press New York, 2000.2.011A.J. Bard and L.R. Faulkner 226 Electrochemical Methods: Fundamentals and Applications, John Wiley, New York 1980.3.011M. Pourbaix, Atlas of Electrochemical equilibria in Aqueous solutions, Pergamon Press, New York 1966.

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vi

Instructor(s) name

Prof. S.Parida