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Measure Corrosion by Electrochemical Impedance Spectroscopy
60 students
Measure Corrosion by Electrochemical Impedance Spectroscopy
A practical approach to using electrochemical impedance spectroscopy, or EIS, for corrosion measurement and analysis.
Created byCorroZone Ltd.
Last updated 12/2024
English
What you'll learn
- Understand EIS and how it can be used to study corrosion.
- Understand processes contributing to EIS response, including polarization resistance, double layer capacitance, and electrolyte resistance.
- Understand resistive and capacitive contributions to the EIS response of corroding surfaces.
- Learn how to combine impedances in series and parallel.
- Learn to measure EIS spectra and understand how corrosion processes affect EIS response shape.
- Understand the impact of surface conditions and measurement settings on EIS results.
- Learn to select suitable signal amplitude, potential, and frequency, and understand measurement effects on accuracy and time.
- Construct and interpret equivalent circuit models for EIS spectra.
- Recognize responses of individual circuit components and identify key spectral features.
- Learn to fit EIS data using circuit models and extract meaningful insights.
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Course content
4 sections • 46 lectures • 3h 57m total length
Requirements
- Basic understanding of corrosion processes (anodic and cathodic reactions, corrosion current)
- Basic understanding of corrosion electrochemistry
- Basic understanding of electrical concepts such as voltage, current and resistance
Description
Note: This course is also available on this platform in Spanish language ( Espectroscopía de impedancia electroquímica para corrosión ) and Italian language ( Spettroscopia di Impedenza Elettrochimica per la Corrosione )
In this course, we will take a practical approach to understanding and using electrochemical impedance spectroscopy (EIS) for corrosion measurement and analysis. We will begin by covering the basics of EIS, discussing essential concepts like impedance, alternating current signals, and corrosion surface phenomena, all aimed at making EIS accessible and straightforward for everyone, and we will finish with a practical example of fitting a complex EIS spectrum.
In Section 1, we will learn about the fundamentals of corrosion and impedance in electrochemical systems, building the foundation for understanding how and why EIS is applied to corrosion studies. In Section 2 we will look at how the processes occurring on the surface impact on the EIS responses, considering key factors like polarization resistance, double layer capacitance, and the impact of surface coatings on the EIS response.
In Section 3, we will focus on practical considerations for measuring EIS spectra. We will discuss critical topics such as the selection of signal amplitude, the measurement frequency range, and the importance of stationarity to obtain reliable results. Finally, in Section 4, we will learn how to interpret EIS spectra using equivalent circuit models, exploring characteristic responses and fitting techniques to extract valuable information from the data.
By the end of the course, we will have the knowledge and skills needed to confidently measure, model, and interpret EIS data for effective corrosion analysis.
Who this course is for:
- Professionals working on corrosion and corrosion testing seeking practical skills to efficiently use EIS for corrosion testing and analysis.
- Researchers working on corrosion-related matters looking to gain a deeper understanding of EIS to enhance their corrosion studies and data interpretation skills.
- Students approaching the issue of corrosion testing via EIS aiming to build a foundational understanding of EIS to confidently measure, analyze, and interpret corrosion data.