Lecture

Mod-01 Lec-41 Degradation of composites, polymers and ceramics, corrosion and society

This module addresses the degradation of various material classes, including:

  • Polymers and their susceptibility to environmental factors
  • Composites and how they fare under different corrosion conditions
  • Ceramics and their unique degradation mechanisms
  • The broader societal impacts of corrosion and material failure

Students will explore how different materials respond to environmental challenges and their implications for society.


Course Lectures
  • This module introduces the basic definitions of corrosion and its significance in material degradation. Understanding corrosion is essential for engineers as it affects the performance and longevity of materials. Key topics include:

    • Definition of corrosion and its implications
    • Overview of environmental factors influencing corrosion
    • Importance of studying corrosion in various engineering applications

    Students will gain foundational knowledge that sets the stage for deeper exploration in subsequent modules.

  • This module covers the various forms of environmental degradation including corrosion types, mechanisms, and thermodynamics involved. Key elements include:

    • Different forms of corrosion: uniform, localized, galvanic, pitting, and stress corrosion cracking
    • Influences of environment, including temperature, humidity, and chemical composition
    • Thermodynamic principles governing corrosion reactions

    Students will learn to identify corrosion types and understand how environmental conditions contribute to material degradation.

  • This module focuses on the thermodynamics of corrosion, providing insights into the energy changes and stability of materials in corrosive environments. Key topics include:

    • Fundamental thermodynamic concepts: Gibbs free energy, enthalpy, and entropy
    • Equilibrium conditions and their implications for corrosion
    • Importance of thermodynamic data in predicting corrosion behavior

    Through this module, students will understand how thermodynamic principles apply to real-world corrosion scenarios, aiding in predictive assessments.

  • This module continues to delve into the thermodynamics of corrosion, emphasizing key concepts that influence material degradation. Students will explore:

    • Factors affecting electrochemical potentials in corrosion processes
    • The relationship between thermodynamics and electrochemical mechanisms
    • Case studies showcasing thermodynamic principles in action

    Students will gain a deeper understanding of the interplay between thermodynamic factors and corrosion rates, essential for effective corrosion management.

  • This module introduces students to the electrochemical series and concentration cells, fundamental concepts in understanding corrosion behavior. Topics include:

    • The electrochemical series and its significance in corrosion
    • Understanding concentration cells and their role in localized corrosion
    • Applications of electrochemical principles in corrosion prevention

    By the end of this module, students will appreciate the critical role of electrochemical factors in predicting and managing corrosion.

  • This module focuses on the reduction potential series and Pourbaix diagrams, essential tools for understanding corrosion in aqueous environments. Key elements covered include:

    • The concept of reduction potential and its application in corrosion analysis
    • How to construct and interpret Pourbaix diagrams for different metals
    • Implications of diagrams for predicting corrosion and passivation

    Students will learn to utilize these tools for assessing material stability and corrosion susceptibility under varying environmental conditions.

  • Mod-01 Lec-07 Pourbaix diagram
    Dr. Kallol Mondal

    The final module revisits the Pourbaix diagram, building upon prior knowledge to explore its applications in corrosion science. This module includes:

    • Advanced interpretation of Pourbaix diagrams for multi-metal systems
    • Case studies demonstrating real-world applications of Pourbaix diagrams
    • Future trends in corrosion research and technology

    Students will gain insights into future directions in the field of environmental degradation of materials, emphasizing the importance of ongoing research.

  • Mod-01 Lec-08 Pourbaix diagram
    Dr. Kallol Mondal

    The Pourbaix diagram is a crucial tool in understanding the thermodynamic stability of materials in various environments. This module will explore:

    • The significance of the Pourbaix diagram in corrosion studies.
    • How to interpret the diagram for different materials.
    • Applications in predicting corrosion behavior and assessing material performance.

    Students will gain insights into the relationships between potential, pH, and corrosion processes, enabling them to make informed decisions regarding material selection and protection strategies.

  • This module delves deeper into the kinetics of corrosion, expanding on fundamental concepts introduced in previous lectures. Topics will include:

    • Kinetic theories that govern the rate of corrosion.
    • Factors influencing corrosion kinetics, such as temperature and concentration.
    • Mathematical expressions for reaction rates and practical examples.

    Students will learn how to apply these kinetics principles to real-world scenarios, allowing them to predict corrosion rates and implement effective material protection measures.

  • This module focuses on solving practical problems related to corrosion rates. Students will engage in:

    1. Analyzing real-world corrosion data.
    2. Applying theoretical knowledge to calculate corrosion rates.
    3. Understanding the implications of these calculations on material selection and engineering design.

    Through hands-on exercises, students will enhance their problem-solving skills and gain a deeper understanding of the practical challenges associated with corrosion.

  • This module introduces the concept of exchange current density, a critical parameter in corrosion science. Key topics include:

    • Definition and significance of exchange current density in electrochemical processes.
    • Methods for measuring exchange current density.
    • Impact of exchange current density on corrosion rates and kinetics.

    Students will also explore how this concept aids in understanding the reaction mechanisms during corrosion and helps in effective corrosion control strategies.

  • This module covers core concepts of polarization in electrochemical corrosion. Students will examine:

    • The principles of activation polarization and its role in corrosion kinetics.
    • How polarization impacts the overall corrosion process.
    • Application of the Tafel equation to real-life corrosion scenarios.

    Through discussions and examples, learners will connect theoretical knowledge with practical applications, enhancing their ability to evaluate and mitigate corrosion risks.

  • In this module, the focus shifts to concentration polarization and its effects on corrosion processes. Key areas of study include:

    • Understanding the mechanism of concentration polarization.
    • Factors affecting concentration polarization in different environments.
    • Implications for corrosion control and material performance.

    Through case studies and analyses, students will learn how concentration effects can alter corrosion rates and strategies for effective mitigation.

  • This final module addresses the mixed potential theory, a vital concept in understanding complex electrochemical processes. Topics will include:

    • The foundations of mixed potential theory and its relevance in corrosion.
    • How to apply mixed potential concepts to predict corrosion outcomes.
    • Case studies highlighting the mixed potential theory in practical scenarios.

    Students will conclude the course with a comprehensive understanding of how mixed potential theory guides corrosion management and material selection.

  • This module delves into the Mixed Potential Theory, outlining the fundamental concepts that explain corrosion events. It emphasizes how electrochemical processes contribute to corrosion mechanisms. Key topics include:

    • Definition of mixed potential and its significance in corrosion.
    • Factors influencing potential development in corrosive environments.
    • Applications of mixed potential theory in real-world corrosion scenarios.
    • Case studies demonstrating the theory's relevance.

    By understanding these principles, learners can better predict and mitigate corrosion-related issues in various materials.

  • This module provides a comprehensive explanation of corrosion events through the lens of Mixed Potential Theory. Learners will gain insights into:

    • Corrosion kinetics and thermodynamics.
    • How mixed potentials arise in corrosive environments.
    • Interpretation of electrochemical corrosion data.
    • Real-life examples of corrosion events explained using this theory.

    Through this exploration, students will be equipped to analyze and evaluate corrosion processes effectively.

  • This module continues the exploration of Mixed Potential Theory, further dissecting the various mechanisms of corrosion. Participants will learn about:

    • The significance of electrochemical potentials in various conditions.
    • Common misconceptions surrounding mixed potential theory.
    • Advanced topics in corrosion prediction and prevention.
    • Tools and techniques for measuring potential in real-world applications.

    By the end of this module, participants will have a firm grasp of the advanced aspects of corrosion science.

  • This module focuses on passivation and its interplay with Mixed Potential Theory. It covers critical concepts such as:

    • The definition and importance of passivation in corrosion control.
    • Mechanisms of passivation films and their formation.
    • Influence of environmental factors on passivation effectiveness.
    • Case studies where passivation successfully mitigated corrosion.

    Students will leave with a solid understanding of how passivation can protect materials from degradation.

  • This module extends the discussion of passivation, examining its relationship with Mixed Potential Theory. Topics include:

    • Detailed analysis of passivation mechanisms.
    • Comparison of different materials' passivation behavior.
    • Role of mixed potentials during passive layer formation.
    • Experimental methods to study passivation processes.

    By understanding these concepts, learners can implement effective corrosion prevention strategies in various applications.

  • This module discusses various corrosion protection mechanisms, emphasizing electrochemical methods. Key topics include:

    • Overview of different corrosion protection strategies.
    • Electrochemical methods and their principles.
    • Comparison of protective techniques and their effectiveness.
    • Case studies showcasing successful applications of these methods.

    Participants will gain insights into how to choose appropriate corrosion protection mechanisms for specific materials and environments.

  • This module provides an in-depth look at cathodic and anodic protection methods, vital for controlling corrosion. Key concepts include:

    • Definitions of cathodic and anodic protection.
    • Mechanisms and principles of each protection method.
    • Applications in various industries and environments.
    • Best practices for implementing these protection strategies.

    Through this module, learners will acquire the knowledge necessary to apply these methods effectively in engineering contexts.

  • This module delves into the concept of anodic protection and various forms of corrosion that materials may encounter. We will explore:

    • The principles of anodic protection and its significance in corrosion prevention.
    • Different forms of corrosion including uniform, galvanic, crevice, pitting, intergranular, and dealloying.
    • Factors influencing corrosion, such as environmental conditions and material properties.

    By understanding these factors, students will be better equipped to identify and mitigate corrosion issues in various applications.

  • This module focuses on the different types of corrosion, specifically uniform and galvanic corrosion. Key aspects include:

    • The mechanisms behind uniform corrosion and its impact on material integrity.
    • An in-depth analysis of galvanic corrosion, including conditions under which it occurs.
    • Real-world examples illustrating the consequences of these corrosion types.

    Understanding these corrosion forms is crucial for implementing effective corrosion control measures.

  • This module offers a thorough examination of galvanic corrosion, its characteristics, and prevention techniques. Topics include:

    • The definition and causes of galvanic corrosion.
    • Factors that contribute to galvanic corrosion, including dissimilar metals in contact.
    • Methods to prevent galvanic corrosion in engineering applications.

    By understanding galvanic corrosion, engineers can design systems that minimize this degradation risk.

  • This module investigates crevice corrosion, a localized form of corrosion that occurs in confined spaces. Key points include:

    • The mechanisms leading to crevice corrosion and its implications for material performance.
    • Factors that exacerbate crevice corrosion, such as environmental conditions and design flaws.
    • Case studies demonstrating the impact of crevice corrosion in various applications.

    Understanding crevice corrosion is essential for engineers to prevent material failures in critical situations.

  • This module continues the discussion on crevice corrosion and introduces pitting corrosion. Key topics include:

    • A detailed look at pitting corrosion, including its formation and characteristics.
    • Comparison between crevice corrosion and pitting corrosion, highlighting their differences.
    • Strategies to mitigate the risks associated with these forms of corrosion.

    Students will gain insights on managing corrosion in critical applications through this focused exploration.

  • This module focuses on pitting corrosion and intergranular corrosion, delving into their causes and effects. Topics covered include:

    • The characteristics and mechanisms of pitting corrosion and its significant impact on material integrity.
    • An exploration of intergranular corrosion and the factors that contribute to its occurrence.
    • Preventative measures to reduce the risk of these corrosion types in various materials.

    Understanding these forms of corrosion is vital for ensuring the long-term performance of materials in service.

  • This module concludes with a discussion on intergranular corrosion and dealloying, examining their implications in materials science. Key points include:

    • The mechanics of intergranular corrosion and its effects on metal structures.
    • Understanding dealloying, a process where one element is leached from an alloy, leading to material degradation.
    • Strategies for preventing these corrosion types in various engineering applications.

    This knowledge is essential for engineers to develop robust materials capable of withstanding harsh environments.

  • This module delves into the phenomena of dealloying and erosion corrosion, crucial processes that affect the durability of metallic materials. Dealloying occurs when one element in an alloy is selectively leached out, leading to a change in the material's properties. Erosion corrosion, on the other hand, is the degradation of materials due to the combined action of corrosion and mechanical wear. Understanding these mechanisms is essential for predicting material performance in various environments. Key topics include:

    • Definitions and differences between dealloying and erosion corrosion.
    • Factors contributing to these types of corrosion.
    • Case studies illustrating real-world impacts on material integrity.
    • Preventive measures and materials selection strategies.
  • This module focuses on the concepts of erosion corrosion and cavitation, both of which are significant factors in the degradation of materials in fluid environments. Erosion corrosion results from the combined effects of fluid flow and corrosion, while cavitation involves the formation and collapse of vapor bubbles in a liquid, generating shock waves that can erode surfaces. Key points of discussion include:

    • The mechanisms behind erosion corrosion and cavitation.
    • Factors influencing these corrosion types.
    • Real-world scenarios where these phenomena are particularly damaging.
    • Strategies for mitigating cavitation and erosion corrosion.
  • This module examines cavitation, fretting corrosion, and corrosion cracking, three critical degradation mechanisms impacting materials in various applications. Cavitation’s destructive potential is amplified by fluid dynamics, while fretting corrosion occurs at contact interfaces due to small oscillatory motion. Corrosion cracking leads to the failure of materials under tensile stress. Key discussions will cover:

    • Definitions and distinctions between these corrosion types.
    • Mechanisms and conditions leading to each type of degradation.
    • Case studies showcasing their impact on engineering structures.
    • Preventive techniques and design modifications.
  • This module focuses on stress corrosion cracking (SCC), specifically the dissolution-controlled mechanisms. SCC leads to sudden and catastrophic failures in materials subjected to tensile stress in corrosive environments. Understanding the dissolution-controlled mechanism is critical for predicting and preventing failure. Topics include:

    • The basics of stress corrosion cracking and its significance.
    • Dissolution-controlled SCC mechanisms and their conditions.
    • Strategies for assessing susceptibility to SCC.
    • Case histories detailing real-world failures attributed to SCC.
  • This module continues the exploration of stress corrosion cracking (SCC) by focusing on cleavage-controlled mechanisms. This form of SCC is characterized by rapid crack propagation and is influenced by environmental and material factors. Key learning points include:

    • Overview of cleavage-controlled SCC and how it differs from dissolution-controlled SCC.
    • Factors affecting SCC, including temperature, stress, and material properties.
    • Techniques for testing and monitoring SCC susceptibility.
    • Preventative measures to mitigate the risk of cleavage-controlled SCC.
  • This module introduces biologically influenced corrosion and liquid metal attack, two important phenomena that can lead to significant material degradation. Biologically influenced corrosion involves the actions of microorganisms that can exacerbate corrosion processes, while liquid metal attack refers to the degradation of metals through contact with liquid metals. Key points of focus include:

    • Mechanisms of biologically influenced corrosion and its impact on materials.
    • Understanding liquid metal attack and its industrial implications.
    • Case studies of failures due to these phenomena.
    • Mitigation strategies and material selection to resist these forms of corrosion.
  • This module covers corrosion protection strategies, focusing on changes in materials and the effects of component design. Effective corrosion management is essential for the longevity of materials in service. Key areas of discussion include:

    • Overview of corrosion protection methods including coatings and cathodic protection.
    • Material selection and design modifications to enhance corrosion resistance.
    • Evaluation of the effectiveness of various protection strategies.
    • Future directions in corrosion prevention technologies.
  • This module focuses on various methods of corrosion protection, including the use of inhibitors and coatings. Students will learn:

    • The significance of environmental changes on material behavior
    • Types of corrosion inhibitors and their mechanisms
    • Different coating techniques to enhance material resistance
    • Assessment of the effectiveness of these protective measures

    Understanding these concepts is crucial for developing strategies to mitigate corrosion in diverse environments.

  • This module delves into the processes of oxidation and hot corrosion, with a focus on:

    • The mechanisms of pitting and how the Bedworth ratio applies
    • Thermodynamics of oxidation and its impact on material integrity
    • Real-world examples of hot corrosion in various environments

    Students will gain insights into how oxidation affects materials under high-temperature conditions.

  • This module covers the thermodynamics of oxidation in detail, including:

    • Understanding the Ellingham diagram and its applications
    • Oxidation kinetics and the laws governing these reactions
    • Factors affecting oxidation rates in different materials

    By the end of this module, students will appreciate how thermodynamic principles influence oxidation processes and material performance.

  • This module will explore oxide structures and their formation through oxidation processes. Key topics include:

    • Types of oxides and their characteristics
    • The role of oxide layers in protecting underlying materials
    • How oxide structure affects material properties and corrosion resistance

    Students will learn how understanding oxide structures can inform better materials selection and corrosion prevention strategies.

  • This module focuses on hot corrosion, corrosion testing methodologies, and failure analysis techniques, including:

    • Understanding the mechanisms behind hot corrosion
    • Methods for corrosion testing and their significance in material evaluation
    • Linear polarization and its application in assessing corrosion rates

    Students will acquire practical skills to evaluate material performance under corrosive conditions.

  • This module addresses the degradation of various material classes, including:

    • Polymers and their susceptibility to environmental factors
    • Composites and how they fare under different corrosion conditions
    • Ceramics and their unique degradation mechanisms
    • The broader societal impacts of corrosion and material failure

    Students will explore how different materials respond to environmental challenges and their implications for society.