1.1    Corrosion and Electrochemistry

Wikipedia delivers the following definition of corrosion: “Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment.” Since electrochemical reactions are the cause for many corrosion processes electrochemistry seems to be an appropriate mean to study corrosion processes and mechanism.

Electrochemistry is a versatile discipline that has applications in various fields of research and industry and corrosion research develops methods to save millions of Euro that are needed to remove the damage done by corrosion. Combine these two disciplines deliver the insights about the processes causing corrosion and are capable to investigate means against corrosion in hours instead of weeks. Although these experiments cannot replace the long term test under real conditions, they can provide the knowledge for a fast pre-selection of approaches that should be investigated more closely.

In the last 10 years electrochemical impedance spectroscopy has been opening new possibilities in corrosion and coating research. This strengthened the electrochemical research in the field of corrosion.

1.2    Goals

Thee tutorials want to explain some basic knowledge of corrosion research with a focus on Linear Polarization Curves and Electrochemical Impedance Spectroscopy EIS). Furthermore it should afterwards be possible to have a general idea of what can be read from the Tafel plot and the EIS spectrum. Some typical shapes of curves and spectra will be shown, to develop some feeling for possible phenomena and indicators.

1.3    Literature

Everyone has a different way of explaining and everyone has different ways to learn. Usually it is smart to give students some choice on which literature they can use, and let them choose what book they like to use. To create this handbook books and some white papers were used. The following books were used:

Allen J. Bard, Larry R. Faulkner, Electrochemical Methods: Fundamentals and Applications, 2nd Edition, 2001, ISBN: 978-0-471-04372-0

Robert G. Kelly, Johm R. Scully, David W. Shoesmith, Electrochemical Techniques In Corrosion Science and Engineering, 2003, ISBN: 978-0-8247-9917-5

Andrzei Lasia, Electrochemical Impedance Spectroscopy and its Applications, 2014, ISBN: 978-1-4614-8932-0

Mark E. Ozrazem, Bernard Tribollet, Electrochemical Impedance Spectroscopy, 2008, ISBN: 978-0-470-04140-6