Monitoring of metal corrosion by electrochemical methods

• V.E. Kasatkin

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation

Abstract: The widespread use of metals and metal coatings in the manufacture of equipment and various products operated both in natural conditions and in technological environments requires the creation of means to control their corrosion behavior. This is relevant both in the process of developing these materials in the laboratory and for monitoring the current state of the equipment in operation. Methods based on the laws of electrochemical kinetics and coulometry make it possible to control the corrosion state of metal objects by measuring electrical characteristics such as current, potential, resistance and impedance. These electrical characteristics can be easily combined with the capabilities of modern microprocessor technology. To date, many methods and principles of interpreting the results of electrochemical measurements have been proposed to assess the corrosion state of metals, but it is not always easy to compare their capabilities and choose the optimal method for solving a particular problem, this publication compares various known methods of corrosion research based on electrochemical measurements. Their capabilities and the relationship of the parameters used are shown. The software for the implementation of the described methods is discussed.

Keywords: corrosion, electrochemical methods, polarization resistance, electrochemical impedance

Int. J. Corros. Scale Inhib., 2024, 13, no. 3, 1482-1500
doi: 10.17675/2305-6894-2024-13-3-7

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