Stochastical Analysis of a Saline Electrochemical System by Michelson Interferometry

摘要

In this work, the state-space diagrams, Lyapunov exponents and correlation dimension are obtained to characterize the corrosion process of an aluminum sample immersed in a solution of distilled water to 0.5, 1.5 and 3% NaCl. The stochastic analysis of the system is made from data sets obtained from Michelson interferometric patterns recorded during the optical monitoring of the corrosion process, which are digitally processed and converted into time series associated with the response of the optical pattern obtained. Moreover, the technique of spectral analysis (FFT) and calculation of the Hurst exponent (H) are used to establish a relationship between frequency components and morphology of corrosion in an entirely qualitative and where only distinguishes corrosion process.