Environmental Degradation of Materials

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3 STUDENTS

INTRODUCTION:Definitions – Different forms of Environmental degradation – Cost of Corrosion – Electrochemical Nature – Aims;THERMODYNAMICS:Process at Interface – Free Energy and Electrochemical Potential – EMF Series – Nernst Relationship – Important Reactions – Cell Potential – Reference Electrodes – Advanced Thermodynamics (E-pH Diagrams);KINETICS:Current Density and Corrosion Rate – Corrosion Rate Expressions – Exchange Current Density – Polarization – Experimental Techniques;MIXED POTENTIAL THEORY:Postulates – Applications to Active Metals;PASSIVATION:Historical Interest – Polarization Behaviour – Application of Mixed Potential Theory;FORMS OF CORROSION: DIFFERENT FACTORS:Metal Purity – Crystal Defects – Grain Structure – Concentration cells – Velocity – Temperature – Humidity – Stress – Microbial effect – Liquid metal effect;FORMS OF CORROSION:Uniform – Galvanic – Intergranular – Crevice – Pitting – Dealloying – Erosion – Stress related corrosion;CORROSION MEASUREMENT AND FAILURE ANALYSIS:Philosophy – Laboratory Tests – Test Specimens – Electronic Probes;HIGH TEMPERATURE OXIDATION:Reactions – Thermodynamics – Oxide Structure – Oxide Growth – Hot Corrosion;CORROSION CONTROL: PHILOSOPHY,MATERIALS SELECTION:Stainless Steels – Nickel and Nickel Alloys – Other Metal Alloys – Plastics – Nonmetallics;CORROSION CONTROL:PROTECTIVE COATINGS:Metallic Coatings – Conversion Coatings – Organic Coatings – Ceramic Coatings;CORROSION CONTROL:INHIBITORS:Passivators – Barrier Inhibitors – Poisons – Scavengers – Neutralizers – Mixed Potential Theory Approach

CORROSION CONTROL ELECTRICAL METHODS:Sacrifical Anode Cathothic Protection – Impressed Current Cathodic Protection – Anodic Protection – Mixed Potential Theory Analysis;COREOSION CONTROL BY DESIGN:Establishing Uniform Corrosion – Minimization of Moisture Condensation – Prevention of Galvanic Cells – Prevention of Environment Cells – Prevention of Corrosion-Mechanical Interactions – Design for Inspection and Maintainence;DEGRADATION OF POLYMERIC MATERIALS:Swelling and Dissolution – Bond Rupture – Weathering – Other Processes – Polymer Cycling and Degradation;CORROSION OF COMPOSITE MATERIALS:Galvanic Effects – Matrix Nature – Reinforcement Nature – Prevention;FUTURE OUTLOOK:Corrosion and Society – Research – Industry

Course Curriculum

Introduction, Basic definition of corrosion Details 56:59
Forms of Degradation, Thermodynamics of corrosion Details 1:43
Thermodynamics of corrosion Details 35:12
Thermodynamics of corrosion Details 54:32
Thermodynamics of corrosion, Electrochemical series, Concentration cell Details 55:38
Reduction Potential series, Pourbaix diagram Details 54:20
Pourbaix diagram Details 59:15
Pourbaix diagram Details 55:14
Pourbaix diagram, Kinetics of corrosion Details 49:39
Kinetics of corrosion, Rate expression, Solved problems Details 54:41
Solved problems on the corrosion rate, Exchange current density Details 55:37
Exchange current density, Polarization, Activation Polarization, Tafel Equation Details 55:7
Activation Polarization, Concentration Polarization Details 56:34
Concentration Polarization, Mixed Potential Theory Details 51:45
Mixed Potential Theory, Explanation of corrosion events on the basis Details 50:47
Explanation of corrosion events on the basis of Mixed potential theory Details 51:29
Explanation of corrosion events on the basis of Mixed potential theory Details 54:4
Passivation and Mixed potential theory Details 52:20
Passivation and Mixed potential theory Details 51:59
Different corrosion protection mechanisms, electrochemical ways Details 55:32
Cathodic and anodic protection Details 54:6
Anodic protection, Forms of corrosion, Factors of corrosion Details 1:13:10
Forms of corrosion, Uniform Corrosion, Galvanic corrosion Details 50:40
Galvanic corrosion Details 36:20
Crevice corrosion Details 18:3
Crevice corrosion, Pitting corrosion Details 52:19
Pitting corrosion, Intergranular corrosion Details 54:53
Intergranular corrosion, Dealloying Details 59:41
Dealloying, Erosion corrosion Details 54:52
Erosion corrosion, Cavitation Details 55:49
Cavitation, Fretting corrosion, corrosion cracking Details 54:39
Stress corrosion cracking: mechanisms(dissolution controlled) Details 51:29
Stress corrosion cracking: mechanisms(cleavage controlled), factors affecting SCC, Details 55:46
Biologically influenced corrosion, liquid metal attack Details 1:1:19
Corrosion protection, change of materials, effect of design of component Details 53:19
Corrosion protection, change of environment, Inhibitors, coatings Details 1:3:42
Oxidation and hot corrosion, pitting Bedworth ratio, thermodynamics of oxidation Details 56:17
Thermodynamics of oxidation, Ellingham diagram, oxidation kinetics and laws Details 48:42
Oxide structure and Oxidation Details 0:59
Hot corrosion, corrosion testing and failure analysis, linear polarization Details 1:19:48
Degradation of composites, polymers and ceramics, corrosion and society Details 54:18

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