Determination of corrosion types from electrochemical noise by phase space reconstruction theory

Chaos theory and the use of phase space reconstruction produce a novel methodology to study electrochemical noise (EN) signals, obtaining novel information to distinguish corrosion types. To evaluate the chaotic nature of electrochemical noise, phase space is reconstructed and the embedding parameter is obtained by the mutual information and Cao's methods. Subsequently, the correlation dimension is calculated. From the correlation dimension, we can conclude that local corrosion shows a higher correlation dimension while passivation shows a lower correlation dimension.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Chaos theory produces a new methodology to study electrochemical noise (EN) signals. ► Phase space is reconstructed and the correlation dimension is calculated. ► From the correlation dimension we can distinguish different corrosion types.