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51318-10777- Fe-Al Galvanic Pair Revisited. The Combined Mathematical-Modeling and Localized-Electrochemical-Impedance-Spectroscopy Approach

Picture for 51318-10777- Fe-Al Galvanic Pair Revisited. The Combined Mathematical-Modeling and Localized-Electrochemical-Impedance-Spectroscopy Approach
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The study of a typical case such as the Fe-Al galvanic couple. Localized Electrochemical Impedance Spectroscopy (LEIS) results are compared to the developed computational model for validation and to predict the worst-case scenario leading to galvanic corrosion.

Product Number: 51318-10777-SG
Author: A. Borrego / R. Mayen / R. Montoya / V. Torres / J. Genesca / V. Vivier / G. Galicia
Publication Date: 2018
Industry: Corrosion Monitoring and Control
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  Modern technologies combine materials of different nature next to each other within the same structures. This new concept leads however to an increased risk of galvanic corrosion which needs to be thoroughly analyzed. The present work aims thus to apply novel techniques to the study of a typical case such as the Fe-Al galvanic couple. Localized Electrochemical Impedance Spectroscopy (LEIS) results are compared to the developed computational model for validation and to predict the worst-case scenario leading to galvanic corrosion. The electric-potential model provides highly valuable information not derivable from AC analysis. Nevertheless, the AC LEIS model currently under development will allow for a better interpretation of the unconventional LEIS features observed.

Key words: LEIS, FEM, Galvanic couples

  Modern technologies combine materials of different nature next to each other within the same structures. This new concept leads however to an increased risk of galvanic corrosion which needs to be thoroughly analyzed. The present work aims thus to apply novel techniques to the study of a typical case such as the Fe-Al galvanic couple. Localized Electrochemical Impedance Spectroscopy (LEIS) results are compared to the developed computational model for validation and to predict the worst-case scenario leading to galvanic corrosion. The electric-potential model provides highly valuable information not derivable from AC analysis. Nevertheless, the AC LEIS model currently under development will allow for a better interpretation of the unconventional LEIS features observed.

Key words: LEIS, FEM, Galvanic couples

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