505211 B: Corrosion and its Control
Marks : 100
Cathodic Processes: Electro deposition of metals and alloys, electrowinning,
Different types of corrosion viz. Galvanic corrosion, Crevice corrosion, Pitting corrosion,
Intergranular corrosion, selective leaching, erosion corrosion, hydrogen damage etc.
Principals of Oxidation: Wangers theory, Pilling Bedworth ratio, Kinetics of
metal – Gas, reaction at high temperature, Prevention of corrosion, Principals of
protection, Inhibitation, Cathodic Protection, Surface treatment, design of components,
Minimum three practical application details (case studies)
Thermodynamic theory of corrosion, Pour Baix diagrams, their application and
limitations, Environmental effects, Electrode kinetics – Polarisation curves, concept of
over potential, Kinetics of passivity and Trans passivity.
Corrosion testing: Surface preparation, exposure technique, measurement of
corrosion rates, selection of material for specific corrosion application such as marine
industry, petrochemical industry, chemical industry, high temperature services.
Anodic metallurgical processes: Anodizing and Hard Anodizing, process
variables, testing of Anodic layer, mechanism of Anodising, sealing, coloring,
Electrolatic cleaning, Electrolatic polishing, Electroetching, Electrochemical grinding and
Corrosion Engineering – M. Fontana and N D Green, McGraw Hill ed. 1967.
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