Electrochemical Noise Analysis of Type 316L Stainless Steel in a LiBr + Ethylene Glycol + H2O Solution

Abstract

Abstract The corrosion behavior of Type 316L (UNS S31603) stainless steel in a lithium bromide (LiBr) + ethylene glycol (C2H6O2) + H2O solution at different temperatures was evaluated using electrochemical noise and electrochemical impedance spectroscopy. The evaluation was performed from the fractal dimension of the electrochemical noise time series obtained using the so-called Rescale Range Analysis (R/S) proposed by Hurst. The fractal dimensions were calculated from the time series obtained for the different condition signals. Also, the surface fractal dimension from the depression angle of the Nyquist plot was obtained, and both dimensions were correlated. The fractal analysis of electrochemical noise helps to evaluate the surface condition and electrochemical performance under the corrosion conditions tested.