Aqueous Corrosion and Its Control

By Prof. V. S. Raja   |   IIT Bombay
Learners enrolled: 469
Corrosion failures of components cuts across all the industries and cost a national about 3.5% of its GDP. In addition, it affects environments, scant resources, safety and reliability of components. Effective control of corrosion requires basic understanding of electrochemical principles, metallurgical aspects and a clear perspective of the industrial problem. This course comprehensively addresses these aspects.

Metallurgical Engineering and Materials Science, but is open to other engineering branches
INDUSTRIES  SUPPORT     : Oil and Gas Industries, Manufacturing
Course Status : Ongoing
Course Type : Elective
Duration : 12 weeks
Start Date : 26 Jul 2021
End Date : 15 Oct 2021
Exam Date : 24 Oct 2021 IST
Enrollment Ends : 09 Aug 2021
Category :
  • Metallurgy and Material science & Mining Engineering
  • Materials Joining
  • Minor in Metallurgy
Credit Points : 3
Level : Undergraduate/Postgraduate

Course layout

Week 1:Introduction to the course and Importance of corrosion
Week 2:Can we predict of corrosion of a metal? Electrochemical Equilibrium and Thermodynamics of corrosion.Pourbaix diagrams and identification of stability regions
Week 3: Concepts of Electrochemical Kinetics, exchange current density charge transfer and diffusion controlled
Week 4:What determines the corrosion rates? Mixed Potential theory Passivity and Application of mixed potential theory for prediction of corrosion. Application of electrochemical kinetics for corrosion rate determination and mechanisms of corrosion
Week 5:Uniform corrosion and the factors affecting them and the control measures, concept of localized corrosion
Week 6:Galvanic Corrosion: Mechanism, factors affecting galvanic corrosion, prevention methods, typical industrial problems and methods of evaluation
Week 7: Crevice Corrosion: Mechanism, factors affecting crevice corrosion, prevention methods, typical industrial problems and methods of evaluation
Week 8:Pitting Corrosion: Mechanism, factors affecting pitting corrosion, prevention methods, typical industrial problems and methods of evaluation
Week 9:Intergranular Corrosion: Mechanism, factors affecting intergranular corrosion, weld decay, knife line attack. Role of welding techniques, parameters and other material conditions on weld decay.
Week 10:Industrial problems of weld decay, intergranular corrosion of other alloys, test methods and selection rationale.
Week 11: Dealloying: Mechanism, factors affecting alloying prevention methods, typical industrial problems.Flow assisted Corrosion, Erosion Corrosion, Cavitation damage: Mechanism, factors affecting these corrosion, prevention methods, typical industrial problems
Week 12:Environmentally assisted cracking: Stress corrosion cracking and Hydrogen Damage Mechanism, factors affecting cracking of metals, prevention methods, typical industrial problems and methods of evaluation
Week 13:Continuation of the above, Microbial Corrosion, Corrosion Control Philosophy and Management

Books and references

Corrosion Engineering, 3rd Ed., Mars G. Fontana, McGraw-Hill, Singapore, 1987.
Corrosion and its Control, 3rd Ed., H.H. Uhlig and R.W. Revie, John Wiley, Singapore, 1991.
Stress corrosion cracking – Theory and Practice, V.S. Raja and T. Shoji (eds); Woodhead Publishing Limited, Oxford, 2011.
Corrosion Failures: Theory, Case Studies and Solutions, K.E. Perumal and V.S. Raja,; ISBN 978-0-470-45564-7, John Wiley & Sons, NJ, 2015, USA

Instructor bio

Prof. V. S. Raja

IIT Bombay
Taught several courses related to corrosion over the last 32 years. Published a book on Corrosion Failure Analysis: basics, Case Studies and Solutions Edited a book on Stress Corrosion Cracking: Theory and Practice. Passionate about teaching, recipient of the Prof. SP. Sukhatme award for excellence in teaching

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 24 October 2021 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Bombay.It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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