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Abstract
The paper presents a novel approach to corrosion rate monitoring using non-linear electrochemical impedance spectroscopy. The authors propose a new variant of non-linear impedance measurement using amplitude-modulated multi-frequency ac perturbation signal. It allows shortening of measurement duration so it is possible to monitor corrosion rate of the systems experiencing rapid changes. In this way a limitation resulting from lack of stationarity condition during the impedance measurements is overcome. Potentialities of the proposed method were presented on the example of carbon steel corrosion in 1 M HCl solution. Sudden changes in the corrosion rate were induced by injection of urotropine as a corrosion inhibitor. The investigations provided time-evolution of charge transfer resistance and corrosion current, clearly reflecting the changes occurring in the investigated system triggered by the inhibitor introduction. Obtained corrosion current values were in a good agreement with the ones acquired using classic method of polarization in the Tafel range.
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
MEASUREMENT
no. 173,
ISSN: 0263-2241 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Ślepski P., Szociński M., Lentka G., Darowicki K.: Novel fast non-linear electrochemical impedance method for corrosion investigations// MEASUREMENT -Vol. 173, (2021), s.108667-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.measurement.2020.108667
- Verified by:
- Gdańsk University of Technology
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