EL3002 Corrosion Science and Engineering Syllabus:
EL3002 Corrosion Science and Engineering Syllabus – Anna University Regulation 2021
OBJECTIVE:
• To provide fundamental understanding on aspects of electrochemistry and materials science relevant to corrosion phenomena and Identify practices for the prevention and remediation of corrosion.
UNIT I BASIC ASPECTS OF CORROSION
Introduction, classification, economics, emf series, Galvanic series. Corrosion theories: derivation of potential – current relationships of activation controlled and diffusion controlled corrosion processes. Potential – pH diagrams Fe-H2O system, application and limitations. Passivationdefinition, anodic passivation theory of Passivation.
UNIT II FORMS OF CORROSION
Definition, factors and control methods of various forms of corrosion: uniform, galvanic, pitting, inter granular, crevice, dezincification, stress corrosion, corrosion fatigue, hydrogen embrittlement.
UNIT III ATMOSPHERIC CORROSION AND PROTECTIVE COATINGS
Atmospheric corrosion – classification, factors influencing atmospheric corrosion, temporary corrosion preventive methods ; organic coating – surface preparation, natural, synthetic resin, paint formulation and applications. Paint testing and evaluation.
UNIT IV IMMERSION CORROSION AND ELECTROCHEMICAL PROTECTION
Corrosion in immersed condition: effect of dissolved gases, salts, pH, temperature and flow rates on corrosion; marine corrosion. Underground corrosion – corrosion process in the soil, factors influencing soil corrosion, Biological corrosion definition, mechanism of biological corrosion control of bio corrosion. Electrochemical methods of protection theory of cathodic protection, design of cathodic protection, sacrificial anodes, impressed current anodes, anodic protection. Corrosion inhibitors for acidic, neutral and alkaline media, cooling water system – boiler water system. Corrosion resistant alloys.
UNIT V CORROSION MONITORING
Laboratory corrosion tests, accelerated chemical tests for studying different forms of corrosion. Electrochemical methods of corrosion rate measurements by Gravimetric, Tafel polarization, linear polarization, cyclic polarization, impedance spectroscopy, harmonics and NDT techniquesultrasonics, radiography eddy current.
TOTAL: 45 PERIODS
OUTCOME:
• Understand basic aspects of corrosion
• Understand factors and control methods of various forms of corrosion
• Understand the concepts of atmospheric corrosion and protective coatings
• Acquire knowledge on Corrosion in immersed condition and Electrochemical methods of protection
• Acquire knowledge on chemical tests for studying different forms of corrosion
TEXT BOOKS:
1. S.N.Banerjee, “An Introduction to Corrosion Science and Corrosion Inhibition”, Oxonian Press, P.Ltd., New Delhi, 1985.
2. Zaki Ahmad, “Principles of Corrosion Engineering & Corrosion Control”, Butterworth Heinemann, London, 2006
REFERENCES:
1. E.E. Stansbury, R.A. Buchanan, “Fundamentals of electrochemical corrosion”, ASM International, 2000.
2. M.G.Fontana & N.D. Greene, “Corrosion Engineering”, III Edition, McGraw Hill, New York, 1978.