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Course Postgraduate
Semester Electives
Subject Code CHM869
Subject Title Corrosion Science and Technology

Syllabus

Corrosion definition, Electrochemical and thermodynamic principles, Pourbaix diagram, Corrosion rate expressions, Tafel equation, Passivity,  Mixed potential theory, Forms of corrosion in metals & non-metals,   Evaluation of corrosion & degradation of materials, Methods of corrosion prevention, Case studies.

 

Detailed Version

Introduction and basic concepts: Corrosion definition - Electrochemical and thermodynamic principles, electrode potential of metals, EMF and galvanic series, Faraday’s laws Pourbaix diagram and its importance to iron, aluminium and magnesium metals

 Electrochemical Kinetics of corrosion: corrosion rate expressions. Exchange current density, polarization - concentration, activation and resistance, Tafel equation, passivity, electrochemical behaviour of active-passive metals, factors governing metals exhibiting passivity, mixed potential theory and its application.
 Forms of Corrosion: Atmospheric, galvanic, crevice, pitting, stress corrosion cracking, intergranular corrosion, corrosion fatigue, hydrogen damage, cavitation, fretting corrosion and high temperature oxidation-description, causes and remedial measures.
Corrosion measurement & testing : Purpose of testing, laboratory, semi-plant and field tests, susceptibility tests of IGC, stress corrosion cracking and pitting, ASTM standards for corrosion testing; polarization methods to measure corrosion rate, surface characterisation techniques.
Corrosion prevention : Corrosion prevention by design improvements, material selection, anodic and cathodic protection, metallic, non-metallic and inorganic coatings, mechanical and chemical methods and various corrosion inhibitors
Corrosion in industries: Corrosion in fossil fuel & power plants, automotive industry,aerospace industry, chemical processing industries, corrosion in petroleum production operations and refining, corrosion of pipelines. Corrosion in launch vehicles, related materials, launch facilities and in space environments.

Text Books

1. D. A. Jones, Principles and Prevention of Corrosion, 2nd edition, Prentice Hall, USA, 1996.

2.  H. H. Uhlig  and R. W. Revie, Corrosion and corrosion control : An introduction to Corrosion science and engineering (4th ed.), John Wiley & Sons,2008.

3. Fontana, M.G., Greene, N.D., Corrosion Engineering, 2nd edition, McGraw-Hill, USA, 1983
4.  Philip A. Schweitzer, Fundamentals of corrosion : mechanisms, causes, and preventative methods, CRC Press, 2010

References

1.  Robert Baboian, Corrosion Tests & Standards: Application & interpretation, ASTM International,

     2010.

2.  Michael Dornbusch, Corrosion analysis, CRC Press, 2019.