Corrosion and Corrosion Protection

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Kirsten Bobzin

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Lecture and Exam information


All technical materials are exposed to environmental influences during their use, which can impair or destroy their usability. In the case of metals, corrosion causes a significant proportion of this damage. The course „Corrosion and Corrosion Protection“ will clarify terms, causes and magnitudes of corrosion. The class will moreover present theoretical basics of corrosion such as kinetics, thermodynamics as well as test methods of electrochemical corrosion and high-temperature corrosion, and explain and illustrate their numerous manifestations on the basis of practical examples. The class is divided into a lecture and an accompanying practical part. The lecture part will cover corrosion protection, suitable corrosion protection methods, in particular metallic coatings, thermally sprayed coatings and Physical Vapor Deposition thin coatings. During the practical part, students will carry out electrochemical test methods and analyze measurement results. In addition, students will have an opportunity to look into the world of coating processes and to jointly produce an industrially applicable corrosion protection coating.

Chapter Content
1. Introduction
  • Operation-induced damage
  • Introduction to corrosion science
  • Forms of corrosion
2. Corrosion protection
  • Definiton of corrosion protection methods
  • Active corrosion protection
  • Passive corrosion protection
  • Examples and causes of corrsoion
  • Application process for anticorrosive coatings

3.1 Fundamentals of electrochemical corrosion I

  • Chemical bond
  • Redox reactions
  • Electrochemical potential
  • Galvanic element
3.2 Construction of a pourbaix diagram
  • Derivation of Pourbaix diagrams
  • Disadvantages of Pourbaix diagrams
3.3 Fundamentals of electrochemical corrosion II
  • Kinetic of corrosion reactions
  • Polarization
  • Current density potential curve
  • Protective layer formation and passivity
4.1 Corrosion protection by Thermal Spraying
  • Coatings as corrosion protection
  • Thermal Spraying
5. Kinds of electrochemical corrosion
  • Ocygen corrosion
  • Acid corrosion
  • Corrosion without mechanical stress
  • Corrosion with mechanical stress
6. Test methods
  • Immersion test
  • Electrochemical test methods
  • Salt spray test
  • Climate change test
  • Application-oriented test benches
  • Field test
7. High temperature corrosion and corrosion protection
  • Fundamentals of high temperature corrosion
  • Corrosion protective coatings
  • Practical examples
8. Flue-gas desulfurization plants (FGD)

  • Pollutant emissions by power plants
  • Process and function of REA
  • Materials
  • Corrosion and corrosion protection
9. Metal-physical corrosion
  • Metal-physical corrosion/processes
  • Liquid metal-induced corrosion
  • Hydrogen-induced corrosion
  • "Tin pest"