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Contents
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| Week 1: |
Introduction to high temperature corrosion , definition of high temperature corrosion, high temperature corrosion types encountered in different application areas, Importance of high temperature corrosion on industrial aplications.
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| Week 2: |
Thermodynamics of metal-oxygen reactions, Gibbs free energy and activity , Ellingham/Richardson diagram, Stability diagrams depend on partial pressure of oxygen and temperature. |
| Week 3: |
Point defects in oxides, examples on typical oxide crystals stochiometric and non-stochiometric oxides,point defect reactions and Kröger Vink notation, n and p ty oxides,thermodynamic equilibria of defects. |
| Week 4: |
Transport mechanisms in oxides,diffusion mechanisms in solids, Fick's first and second law of diffusion, experimental methods used in diffusion studies, solutions of Fick's second law of diffusion, Kirkendall effect, Darken analysis, high diffusivity paths, diffusion in oxides. |
| Week 5: |
Oxidation mechanisms, initial stages of oxidation, transport mechanisms in oxidation, experimental methods used in measuring oxidation kinetics ,linear oxidation rate law, parabolic oxidation rate law, logarithmic oxidation rate law. |
| Week 6: |
Oxidation of pure metals at high temperature, single oxide scale forming systems, multiple oxide scale forming systems, systems for which volatile species are important, systems with significant oxygen solubilities in the metal, crack forming systems. |
| Week 7: |
Oxidation of alloys, classification of reaction types, noble parent with base alloying elements, base parent with base alloying elements, protective oxide forming alloys ( iron and nickel based) |
| Week 8: |
Midterm exam |
| Week 9: |
Stress formation during high temperature oxidation,factors causing stress formation during oxidation, growth stresses, thermal stresses, cyclic oxidation, stress relief methods for improving scale adherence. |
| Week 10: |
High tepmerature corrosion in sulphur containing environments, metal-sulphur reactions, sulfidation kinetics, hot corrosion, type 1 and type 2 hot corrosion, basic and acidic fluxing. |
| Week 11: |
High tepmerature corrosion in alkali and halogen containing environments, metal-alkali and halogen reactions,cyclic chlorine corrosion, corrosion in molten salts and carbonates. |
| Week 12: |
High temperature corrosion in carbon and nitrogen containing environments, alloy resistance to carburization, metal dusting, mechanisms of metal dusting, prevention mechanisms against metal dusting, internal nitridation, effect of internal nitridation on mechanical properties. |
| Week 13: |
Effect of hydrogen and water vapor on high temperature corrosion of metals, permeataion of hydrogen at elevated temperature,corrosion in low and high oxygen partial pressure environments containing water vapor, dual atmosphere corrosion. |
| Week 14: |
Corrosion in molten metals,simple dissolution, alloying between melt and metal, intergranular penetration, mass transfer owing to thermal gradient, mass transfer owing to concentration gradient, corrosion in industrial molten metals. |
| Week 15*: |
General review. |
| Week 16*: |
Final exam. |
| Textbooks and materials: |
Per Kofstad, High Temperature Corrosion.
Neil Birks, Introduction to High Temperature Oxidation of metals. |
| Recommended readings: |
David Young, High Temperature Oxidation and Corrosion of metals.
César A. C. Sequeira, High Temperature Corrosion: Fundamentals and Engineering.
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* Between 15th and 16th weeks is there a free week for students to prepare for final exam.
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