Abstract
The concept of automated processing of electrochemical current noise in the time domain is presented. The methodology is based on the identification of “run-ups”, which are representative of every single rising feature (transient) in a signal. Selected transients are then subjected to the analysis in terms of their characteristic parameters. Functionality is first demonstrated on a simulated signal with a predefined sample of pitting nucleation events and then in application to processing current signatures from potentiostatic tests on Alloy C22. The results from the analysis of the simulated signal are compared with those of a frequency-based analysis, and it is demonstrated that analysis in the time domain provides direct quantitative information on electrochemical processes that cannot be obtained from frequency-domain analysis.
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